Monday, November 17, 2014

CST webinars and content for industry

CST likes to make things as simple and straightforward as possible for it customers and users. Not only our software itself, but also access to support and information about the latest developments in EM simulation and how to use our tools in an efficient and effective manner.

That's why the yearly CST Webinar Series always proves popular, with great participation and learning for both the webinar presenters and the attendees. Like CST's simulation experts, our customers and users want to become better and better at what they do.

The CST Webinar Series 2014 has four remaining webinars left to go. It ends on December 11. While organising all the great material that's come out of it, we thought it's a good time to share related material based on an industry breakdown.

CST software is used in a broad range of industries as diverse as telecommunications, defense, automotive, electronics, and healthcare. We have run previous webinars focused on applications for these different industries as well as published related whitepapers and other material.

Here is a list of key industries that use CST software. Each link leads to a page with previous webinars and materials related to that particular industry, and each one provides a helpful educational resource.

There are two other places to find webinars and articles relevant to your work. The first is in our webinar archive and the second is in the applications section of the CST website. Have a look around and familarize yourself.

Tuesday, October 28, 2014

CST interviews Professor Mário G. Silveirinha, University of Coimbra, Portugal

Professor Mário G. Silveirinha is an associate professor in the Electrical Engineering Department at the University of Coimbra in Portugal. His interests include metamaterials, nano-optics and plasmonics. His group won the CST University Publication Award in 2012 for a research paper on ultraconfined interlaced plasmons. We had the opportunity to ask him a few questions about his research and his use of simulation.

CST: Hello Mario, we’re happy you could take the time to speak to us. The paper which won our University Publication Award was for a study of ultraconfined interlaced plasmons. What was the background to this work – was it purely theoretical, or are there applications for these plasmons?

There are indeed many applications!

In general, the diffraction of light prevents us from doing many interesting things. For example, diffraction limits the miniaturization of microwave and optical devices because the confinement of light in a standard waveguide (e.g. an optical fiber) requires that the characteristic size of the cross-section should be of the same order of magnitude as the light wavelength.
In our work, we explored the potentials of a novel artificial material formed by a dense mesh of crossed metallic wires showing that it supports localized charge density oscillations (interlaced plasmons), whose characteristic spatial size is determined by the entanglement of the grids, rather than by the electrical length of the metallic wires.
Interestingly, because of the deeply subwavelength size of the interlaced plasmons, they can serve as the basis for either novel ultra-subwavelength waveguides, or for the design of novel broadband “superlenses” able to restore subwavelength features inaccessible to conventional systems.
For example, in a follow up study (M. G. Silveirinha, C. R. Medeiros, C. A. Fernandes, J. R. Costa, New J. Phys. 13, 053004, 2011) we experimentally verified that the interlaced plasmons enable to resolve objects separated by subwavelength distances over a broad range of frequencies. This can have interesting applications in sensing, microscopy, and in radiofrequency identification systems (RFID).

CST: How did you use simulation in this project, and how did it fit in with the theoretical and experimental work?

We used CST MICROWAVE STUDIO® (CST MWS) to characterize the electromagnetic response of a microwave prototype that served to demonstrate the excitation, ultra-confinement, and the propagation of the interlaced plasmons. The agreement between CST and our experimental results was really good! Moreover, the results obtained with CST compared extremely well with an analytical model developed by us.

CST: Did the award help you or your group in carrying out research?

Absolutely! Most of all, I would like to say that we were really honored that our research work was distinguished by CST. The award gave us additional resources to run our simulations, and this was extremely useful because CST MWS is an invaluable work tool in most of our projects.

CST: Is there any other work you’re involved in that you would like to highlight?

Yes, recently we became interested in the problem of trapping light in a bounded open material cavity. The lifetimes of light oscillations in closed lossless cavities, e.g. a closed metallic box with perfectly conducting walls, can in theory be infinitely large because the photons are unable to escape the system. However, in open systems the light energy continuously leaks away in the form of a radiated wave, and hence the oscillation lifetime is finite. Interestingly, we discovered a way out of this bottleneck (M. G. Silveirinha, Phys. Rev. A, 89, 023813, 2014), and demonstrated that in the limit of no material loss volume plasmons may provide perfect electromagnetic shielding. Our solution allows for free light oscillations with an infinite lifetime in a dielectric core, despite the fact that the cavity is open and transparent to the radiation coming from the outside world. CST MWS was essential to support our ideas, and allowed us to demonstrate how based on nonlinear materials it may be possible to trap quantized amounts of radiation – with a very specific value of the electromagnetic energy – in an open cavity!

CST: Thank you for your time, and for sharing some very interesting results with us!

Monday, October 20, 2014

Celebrate the Day of Photonics with CST

Photonic coupling into a plasmonic waveguide
Everything has a day in its honor, and future technologies are no exception.

On October 21, companies and research organizations worldwide will be celebrating the Day of Photonics by organizing events for photonics engineers and the wider community.

We will be doing our part as a supporter of the event with an afternoon session at the CST US headquarters in Framingham, Massachusetts to discuss some of the challenges facing photonics engineers and the role of simulation in optical and photonic design.

Pizza, soft drinks and informal chats about your simulation requirements with CST engineers will follow a talk about the cutting-edge developments in photonic simulation.

We have many years of experience of simulation for optical applications, and the range of specialized material types, simulation features and post-processing methods for photonic simulation in CST STUDIO SUITE is constantly growing. We’d be delighted to hear what you do with our software, and learn more about your requirements.

So, if you’re interested, register now and secure your place.

Thursday, October 2, 2014

CST takes 3D EM simulation to Rome for EuMW

Click here for our schedule of talks
All roads lead to Rome, the saying goes. And next week CST is on the road to Rome to attend Europe's largest microwave and RF event.

To be held at the Fiera de Roma conference centre, the six day European Microwave Week (EuMW) 2014 is going to be big. Three conferences on leading developments, workshops, seminars, a trade and technology exhibition with more than 250 exhibitors, an estimated 2000 conference delegates and more than 5000 visitors.

CST is rightly proud to be a platnium sponsor of this major event. EuMW visitors can check their emails at the CST-sponsored cyber café in the exhibition hall and delegates can use the WiFi access in the conference area.

As well as sponsorship, we will also be part of the daily action, including a full schedule of free electromagnetic (EM) simulation presentations at CST booth 109. During the exhibition, running October 7-9, we will be offering free application presentations and simulation technology talks from 10:30 to 16:00.

Here's a snapshot of what we'll be doing:

The 2015 version of  CST STUDIO SUITE® will be unveiled and previewed at the show. Each day our expert staff will demonstrate new features between 10:30 and 11:30. CST STUDIO SUITE 2015 features a new powerful Array Wizard tool for synthesizing and designing antenna arrays. The 2015 version's full-wave high frequency solvers are also more tightly integrated than ever.

EM Simulation Presentations
For the duration of the exhibition, we will be offering 35 free demonstrations, customer presentations and simulation technology talks. Included on the agenda are talks on EM simulation for space applications, numerical simulation of metamaterial inspired components and antennas, EMC in the design flow of modern electronics, comparing simulation and measurement and much more. Download the full schedule here.

Antenna Magus
We will be hosting talks and live demonstrations from Magus Pty., showing how Antenna Magus can be used alongside CST software.

Booth Party
Come along to our traditional booth party on Tuesday October 7 from 16:30 to closing for drinks, snacks and an informal chat with our EM simulation experts.

Presentations in Italian
On Wednesday October 8, from 13:00 to 16:30, we're hosting eight application and simulation technology talks in Italian.

It's going to be a great week and we're looking forward to meeting you there.

Tuesday, September 16, 2014

CST Webinar Series 2014 - Exploring EM Simulation

In the fast moving world of electrical design, EM simulation is now a must rather than a nice-to-have.

Electrical engineers of all stripes are increasingly expected to do more with less, and in less time. Every bit of time-saving knowledge is therefore money well spent. Even better if it comes free!

Running from September to December, CST's Webinar Series 2014 offers exactly this - 12 free webinars that provide an insight into EM simulation and techniques to shorten the design cycle and reduce the number of costly prototypes required.

Each of the webinars has both the newcomer to CST software in mind and the advanced user. No matter your experience, whichever webinar you attend, we think you'll benefit.

The 2014 Webinar Series begins late September and ends mid-December and kicks off with a webinar on multiphysics simulation for medical applications.

The series covers trending topics such as how to strengthen EMP/lightening protection for critical facilities with EM simulation (a recent hot topic in the media), antennas for automotive applications, simulation-enabled 5G antenna design and the simulation of accelerator components. Below is the full list.

Registrations are now open; simply follow the links to secure your place!

September 25: Multiphysics Simulation for Medical Applications. Read more and watch on-demand here.

October 2: EM Simulation for Sensor Development. Read more and watch on demand here.

October 9: Lightning and EMP Protection for Buildings. Read more and watch on demand here.

October 16: Simulation of Accelerator Components. Read more and watch on demand here.

October 23: Mobile Phones & Automobile Systems. Read more and watch on demand here.

October 30: Power Delivery Network (PDN) Analysis:  Read more and watch on demand here.

November 6: EMC Simulation in Modern Electronics. Read more and watch on demand here.

November 13: Efficient Simulation of Optical Devices. Read more and watch on demand here.

November 20: Modeling a DDR4 Memory Channel. Read more and watch on demand here.

November 25: Modeling Material Properties. Read more and watch on demand here.

December 4: Antennas for Automotive Applications. Read more and watch on demand here.

December 11: Simulation-Enabled 5G Antenna Design. Read more and watch on demand here.

Monday, August 18, 2014

Improved workflow between CST STUDIO SUITE and Optenni Lab

Guest post by Jussi Rahola, Managing Director, Optenni Ltd

A good simulation tool includes not only advanced mathematical algorithms and an easy-to-use user interface, but also capabilities for linking with other simulation software. Software interoperability has become more important and valuable to the end users in speeding up their design work, also enabling new types of design flows and analysis types.

The recently released Optenni Lab 3.0 and CST STUDIO SUITE® 2014 Service Pack 3 enables a new joint workflow between these leading matching circuit and electromagnetic simulation software. We launched the first joint workflow three years ago, but the newest update introduces several important new features. Tuning an antenna with a matching circuit based on simulated results has never been easier - just follow these easy steps:

1. Simulate the antenna in CST MICROWAVE STUDIO®

2. Launch a macro command in CST MICROWAVE STUDIO®  to open Optenni Lab with the simulated impedance data (also the efficiency data is now passed to Optenni Lab)

3. Optimize the matching circuit for desired operation bands in Optenni Lab

4. Transfer the matching circuit back to CST DESIGN STUDIO™

In the new version, the matching circuit is directly constructed on the CST DESIGN STUDIO® schematic, connected to an external port and simulated. The workflow works equally well with multiport antennas.

We can also take the joint workflow one step further. Suppose the electromagnetic simulation model is changed – for example, by varying the antenna size and height or antenna placement. Normally, this will change not only the radiation properties of the antenna but also the impedance matching and thus the antenna needs to be re-matched after each parametric simulation. We can now combine a parameter sweep in CST STUDIO SUITE®  with a post-processing step that uses Optenni Lab to automatically optimize the matching circuit for a given frequency range. Thus, the user can see the effect of changes of the physical antenna parameters to the S-parameters and efficiencies, using optimized matching circuit for each parameter combination.

Additionally, we can set up an optimization task such that CST STUDIO SUITE®  is controlling the parametric lengths of the electromagnetic structure and the optimization goal is the total efficiency through an optimized matching circuit. This is a coupled electromagnetic and circuit optimization problem that is very challenging to solve using a single software alone.

In addition, the bandwidth potential calculation (estimation of the bandwidth of resonant or non-resonant antennas at all frequencies) and the electromagnetic isolation calculation (calculation of the worst-case isolation independently of antenna matching) can also be launched from CST MICROWAVE STUDIO® as post-processing steps. This can be used to study, for example, antenna placement for maximal bandwidth or for maximal isolation and to understand the wideband characteristics of antennas.

Monday, August 11, 2014

CST workshop in the City of Space

Space technology not only makes our global civilization possible, but immensely easier. Designing it, however, can be anything but.

Unprotected by the atmosphere satellites, for example, are exposed to the full fury of the sun’s radiation. Inside, their powerful and tightly-clustered systems generate their own potentially mission-botching electromagnetic heat.

These extreme thermal conditions pose a difficult, but enjoyable challenge to engineers and demand electromagnetic simulation early in the design phase to ensure mission-critical components function properly once a satellite is in orbit.

To assist designers and companies working in this exciting and challenging field, CST is hosting its first workshop on electromagnetic design for space applications, including satellites, probes and ground stations. It will be held on September 23 in Toulouse, France at Cité de l‘Espace (City of Space), a theme park dedicated to space science, the space industry and the conquest of space.

The workshop will give attendees the opportunity to meet engineers and scientists from industry, research, and universities working on space applications.

The workshop’s keynote speakers are Airbus Defence and Space’s Manager of Antenna Feed Systems and Products Ralf Gehring and Thales Alenia Space’s Head of Space Antennas RF Design Unit Dr. Roberto Mizzoni.

The preliminary agenda, while subject to change between now the workshop, will cover the following the following topics:

• Complex feed systems and reflector systems

• Microwave components: filters, circulators etc.

• Multipaction analysis and thermal and structural mechanics

• Electromagnetic compatibility on satellites and launchers: installed performance and cabling

• SI, PI on high speed data connections

• Enhancing simulation throughout using high performance computing

Depending on the total number of participants the workshop may offer parallel sessions on the other topics. Registrations are coming in now. Please feel free to invite your colleagues, but everyone who wishes to attend must pre-register.

Visit our website for more information and to register.

The workshop comes off the back of a webinar CST presented at the end of July on electromagnetic simulation for space applications which attracted more than 281 live participants from all over the world and ended in a lively 15 minute Q&A session. The webinar can be viewed here.

CST’s Global Market Development Manager for Microwaves and RF, Marc Rütschlin, demonstrated how CST STUDIO SUITE® can be used to design the mission-critical componentry in satellites.

The webinar covered the following topics:

• How electromagnetic and multiphysics simulation allows the behavior and installed performance of mission-critical components such as antennas and filters to be investigated long before construction and launch.

• Why the densely-packed structure of satellites means that interference between different systems is a critical consideration in the design process.

• How the high-power components in satellites introduce additional potentially harmful effects, such as heating and multipaction, and how these can be investigated by charged-particle and multiphysics simulation tools.

• How to make simulation more efficient by splitting up complex systems into individual elements, which can be simulated and optimized separately using different solver types.

• How the System Assembly and Modeling framework in CST STUDIO SUITE allows numerous simulation tasks to be combined into a single project in order to allow the integrated design of satellites at both the component and system level.

Wednesday, July 30, 2014

Lighting the Way at the International Symposium on EMC

We’re glad to be a part of the 2014 IEEE International Symposium on Electromagnetic Compatibility (EMC), taking place this year in Raleigh, North Carolina from August 3-8. The event gathers the best in the industry through its focus on learning and collaboration and presentation of top-rated technical papers. The theme of this year’s event is, ‘EMC Lights the Way’. As part of the show, we’re hoping to contribute our own insights on how electromagnetic (EM) simulation can help light the way throughout the EM design process.

Drop by to one of our talks below or visit us at booth no. 711 to have a chat about how CST STUDIO SUITE® can be used to analyze EMC issues. 

CST Show Schedule

Monday August 4

8:30 am - 12:00 pm Room 306C
Electromagnetic Analysis of Installed Antenna Performance on a UAV and Assessment of Co-site Interference

8:30 am - 12:00 pm Room 302B
EM Modeling of High-Speed Interconnects for Signal Integrity Analysis

1:30 pm - 5:30 pm Room 302C
Co-chair of 'Using CEM Modeling to Understand the Underlying Physics in EMC Problems' session

1:30 pm - 5:30 pm Room 302C
Combining Electromagnetic Field Simulation and Physics Based Models

Tuesday August 5

11:30 am - 12:00 pm Room 302B
Electromagnetic Simulation of 3D Stacked ICs: Full Model vs S-Parameter Cascaded Based Model

1:30 pm - 5:30 pm Room 302C
Standalone Removable EBG-Based Common Mode Filter for High Speed Differential Signaling

Thursday August 7

8:30 am - 9:00 am Room 302B
Effective Roughness Dielectric in a PCB: Measurement and Full-Wave Simulation Verification (Finalist for Best SI/PI Paper Award)

Radiated emissions coupling through a cable into an enclosure

Monday, July 14, 2014

Antenna Magus Version 5.0 Release

Magus (PTY) Ltd (Magus) has just announced their fifth major release of Antenna Magus and with it has included several exciting new updates.

Smart Design

Magus describes this feature as “Design at the click of a button, using the information you have”. Effectively this means that many of the design steps have been simplified down to just one click. The option to specify all design objects is, of course, still possible, but “Smart Design” caters for empty or incomplete objective sets using intelligent predictions. The suggested values can be further adjusted to refine the design appropriately.

Specification Library

The “Specification Library” introduces several pre-defined specifications which can also be expanded and refined. Each specification contains values that represent the performance requirements of the targeted design, with the possibility to include keywords to describe the required antenna. The library can also be used to store various design specifications in a structured format and are easily accessible for later use.

Chart Tracer Tool

The Chart Tracer Tool has been updated with value extraction capabilities. Once a trace has been captured and the X and Y axis types specified, the tool automatically calculates the relevant performance parameters. Useful values such as bandwidth, beamwidth, etc. can now be extracted and determined quickly from plots or images and can be further used in the design process.

25 New Antennas

Antenna Magus continues to expand their antenna database and this release sees an additional 25 new antennas including array antennas, waveguide and reflector antennas, wire antennas, planar antennas and more.

We’ve just given a preview of Antenna Magus Version 5.0. To read more about the range of new antennas, general updates and to get a deeper insight into the new features, read the latest Antenna Magus newsletter.

Existing Antenna Magus users can download version 5.0 from the CST homepage. For those interested in this antenna design tool, an evaluation license can be requested.

Thursday, June 12, 2014

CST and Rohde & Schwarz team up for the “Measurement meets Simulation” workshop

Simulation and measurement are complementary tools, and together they offer more than either technique can alone. However, this is only true when the results of the two are comparable.

There are various reasons why simulation and measurement may not agree, even when it seems like you’ve done everything right. These include the simulation set-up, manufacturing variations in the prototype, and the effect of connectors and cables used in the measurement. Therefore CST has teamed up with Rohde & Schwarz, the world’s leading manufacturer of wireless communications and EMC test and measurement equipment, to put together a workshop titled “Measurement meets Simulation” The aim of this workshop is to give engineers an insight into how to achieve accurate simulations and show best practice guidelines to getting better measurements.

The first workshop was held at Loughborough Antennas and Propagation Conference (LAPC) 2013 and attracted 40 participants, from both industry and academia. Participants learned how to design and simulate a patch antenna using CST STUDIO SUITE®, and how to measure its performance using the new ZNB and ZNC network analyzers from Rohde & Schwarz. In addition, they also learned about how under- and over-etching can affect the performance of prototypes, and how to estimate the effect of manufacturing tolerances using sensitivity analysis.

Figure 1: The four stages of antenna design covered by the workshop

With the success of the first workshop, CST and Rohde & Schwarz are now bringing the workshop to other locations. The next workshop will be held in Dublin, Ireland on 9 July, 2014. If you are interested in attending, the agenda and registration details can be found on our website.

Wednesday, June 11, 2014

Trends from the CST European User Conference 2014

This year’s European User Conference helped to show us just how users are implementing electromagnetic (EM) simulation into their design workflows. The event, including workshops and a two-day conference, was held in Berlin from May 7-9 and gathered users from diverse industries to facilitate knowledge exchange through various application-based technical presentations. Even during the coffee and lunch breaks, insights on engineering design challenges and solutions were being shared between users.

We covered topics in a range of application areas. Although antennas remained a popular session, we saw an increasing amount of interest in EMC and also introduced new sessions on high power microwaves, high performance computing, components and optical applications. With the diversity in applications continuing to grow, the conference is incredibly useful in seeing how CST software is being used to address today’s complex engineering challenges in industries ranging from phones to particle accelerators, and from railways to radio-astronomy.

Our keynote speakers brought with them expertise from the cutting-edge of industry. Prof. Wolfgang Heinrich shared his knowledge of extremely high frequency integrated circuits operating in the 100 GHz regime, while Dr. Bruce Archambeault both spoke about the role of simulation for EMC/EMI analysis on PCBs and led a workshop on EMC simulation.
Now with this year’s event over, we are already planning for CST EUC 2015 to be held in Darmstadt, Germany from April 28-29. Keep a look out for more news as we get closer to the date.

As always, some of the technical presentations from CST EUC 2014 are available to download with the permission of their authors.

Wednesday, May 28, 2014

CST Presentations at the International Microwave Symposium 2014

While engineers world-wide begin preparing for the IEEE MTT International Microwave Symposium (IMS) in Tampa, Florida from June 1-6, we are also busy setting up our booth (# 1423) for a series of application-based talks.

CST are silver sponsors of this year’s event and we will have a team of engineers at the show to answer any technical questions and to discuss electromagnetic simulation and its use in a range of applications.

All attendees are welcome to drop by booth #1423 to listen to our presentations which will focus on presenting practical demo workflows.

Tuesday June 3

09:50 – 10:05 Automatic CAD Update in CST MICROWAVE STUDIO
15:15 – 15:30 Antenna System Modeling and Simulation
15:30 – 15:45 From Specs to 3D – Filter Design with Nuhertz FilterQuick and CST

Wednesday June 4

09:50 – 10:05 Simulation of Complex Cable Harnesses using CST CABLE STUDIO
15:15 – 15:30 Co-Site Analysis of an UAV using CST MICROWAVE STUDIO and Delcross EMIT
15:30 – 15:45 3D Model Generation from Schematic Blocks via SAM

See you in Tampa!

CST at IMS 2013 in Seattle

Thursday, May 22, 2014

YEP Award – A Winner’s Perspective

In our last blog, “Universities in Japan Granted with the YEP Award”, we announced the latest winners of the award. The YEP (Yes! Education Program) Award, an initiative run by our partners AET Japan, grants an extended one-year license to universities that use CST software, in order to assist  their research projects. In this blog, Dr. Yasuaki Monnai from The University of Tokyo and winner of the YEP Award 2013, describes his recent research paper and details how he and his team use CST in their lab.  

Winner’s comment (By Dr. Yasuaki Monnai from The University of Tokyo)

It is our great honor and pleasure that our recent paper [*] has been awarded for the YEP Award. In that paper, we presented a planar millimeter-wave antenna based on surface-wave scattering from a perturbed metal corrugation. The simulation of surface-waves is not quite compatible with a conventional transmission line model, so a direct calculation of Maxwell’s equations is important. Being based on the direct calculation along with realistic excitation ports and probes, we are allowed to model and investigate whatever strange structures on CST. We thus regard the CST as a virtual lab that allows us to not only prototype a new device but also predict how it is characterized. Consequently, new challenging ideas can be tested with a great speed at a low cost.

Our group has been working on the engineering of wide EM spectra ranging from MHz to THz for applications such as communication, sensing, and wireless power transmission with an emphasis on how they can be merged in human-computer interaction scenarios.

Irrespective of the spectra, we have been using CST for almost 10 years. CST serves also as the best tool for students to learn Maxwell’s equations as well as a common language when performing international collaborations. We believe CST is one of the first needs when starting up a new lab.

[*] T. Okuyama, Y. Monnai, and H. Shinoda, “20 GHz Focusing Antennas Based on Corrugated Waveguide Scattering,” IEEE AWPL, vol.12, no.1, pp.1284- 1286, 2013, has received the YEP Award.

For more information, have a look at the research paper.

Wednesday, May 14, 2014

Universities in Japan Granted with the YEP Award

The Yes! Education Program (YEP) Award, an initiative run by our partners AET Japan, grants an extended one-year license to universities that use CST software, in order to assist their research projects. For the YEP Award 2013, two winners were chosen:
  • Dr. Yap Yung Szen from Osaka University and,
  • Dr. Yasuaki Monnai from The University of Tokyo. 
Both candidates published research papers that demonstrated the skilful use of CST STUDIO SUITE®. In this blog, Dr. Yap Yung Szen from Osaka University describes the research project that won him and his team the award.  

Winner’s comment (By Dr. Yap Yung Szen from Osaka University)

In Kitagawa Lab of Osaka University, we use Nuclear Magnetic Resonance (NMR) and Electron Spin Resonance (ESR) for molecular spin quantum computing research. This means that our experiment setups require extensive use of RF and microwave components and instruments.

An important part of the setup is the resonator and one part of my research is to create a stripline ESR resonator that will allow users to control electron spins quickly before the spin decoheres with time and information is lost irreversibly. Since the electron spins react to the strength of microwave magnetic field, we can control (or “rotate”) the spins quickly using an efficient resonator coupled with sufficient microwave power. The measure of how fast the spins “rotate” is known as Rabi frequency and is represented in hertz.

The flexibility and accuracy of CST MICROWAVE STUDIO® is instrumental to our research work. In our paper, we describe our work to use the software to design, simulate and fabricate a new stripline resonator that efficiently converts microwave power to magnetic field at around 17 GHz. By applying pulses around 1 W, we have demonstrated a Rabi frequency of ca. 210 MHz. Rabi frequencies rarely exceed 100 MHz, especially for ESR spectroscopic experiments, but such high Rabi frequency and a broad bandwidth are useful for quantum computing. By overcoupling the resonator, we were able to increase the bandwidth from around 200 MHz to about 560 MHz, which allows us to use pulses as short as 2 ns when overcoupled. In this paper, we also proposed a new coupling adjustment method for (transmission and reflection type) stripline and micro-stripline resonators, which we believe, offers greater flexibility than conventional methods.

For more information, please have a look at our paper (

Tuesday, April 29, 2014

The CST Korean User Conference 2014

The CST Korean User Conference continues to grow each year, attracting various users from both academia and industry. This year 170 people joined us for the one-day event on April 10 to network with peers and to take a closer look at the latest version of CST STUDIO SUITE®.

Application talks were presented on the topics of EMC, multiphysics and microwaves and RF, as well as user-based presentations showcasing specific design challenges.

Attendees were particularly interested in the new functions of CST STUDIO SUITE 2014 and were able to benefit from the peer-to-peer interchange of knowledge.

Thursday, April 24, 2014

The CST US Workshop Series 2014 Kicks-Off

The end of April marks the commencement of the CST US Workshop Series 2014. With stops in ten different cities across the country, the events will focus on demonstrating the capabilities and benefits of CST STUDIO SUITE® 2014 and and its integration with partner products from Synopsys, Delcross and Optenni Lab.

These workshops are an opportunity for you to find out more about designing and optimizing electromagnetic components and systems with the help of virtual prototyping.  There have been major advances in both software and computing hardware in recent years and realistic large scale simulation of full devices and systems is now possible in relatively short run times, helping you ensure your system will meet specs and regulations before it’s built.

 If you have never used EM simulation or CST STUDIO SUITE before, please join us to see how this advanced technology can benefit you directly.

The agenda will include a live demo of CST STUDIO SUITE 2014 as well as application-specific workflow examples in the areas of microwaves & RF, antennas, electronics, EMC/EMI and multiphysics.

All the workshops are free to attend and lunch and refreshments will be provided.

Click on the links below for more information and to register online.

April 29 – Baltimore, Maryland: Microwaves & RF, Antenna
April 29 – Seattle, Washington: Microwaves & RF, Antenna, EMC/EMI
May 6 – Santa Clara, California: Microwaves & RF, Antenna (morning session)
May 6 – Santa Clara, California: EMC/EMI, EDA (afternoon session)
May 13 – Framingham, Massachusetts: Microwaves & RF, Antenna (with hands on afternoon session)
May 13 – Framingham, Massachusetts: Microwaves & RF, Antenna (morning session only)
May 13 – Irvine, California: Microwaves & RF, Antenna (morning session)
May 13 – Irvine, California: EMC/EMI, EDA (afternoon session)
May 20 – Chicago, Illinois: Microwaves & RF, Antenna
June 10 – Dallas, Texas: Microwaves & RF, EMC/EMI
June 12 – Framingham, Massachusetts: Low Frequency
June 18 – Framingham, Massachusetts: EMC/EMI and SI/PI
July 1 – Denver, Colorado: Microwaves & RF, EMC/EMI
July 29 – Melville, New York: Microwaves & RF, EMC/EMI

Wednesday, April 23, 2014

Version Control in CST STUDIO SUITE 2014

No matter how powerful and versatile the simulation product is, it will always be limited unless it’s also user-friendly and works well with other tools. CST devotes large amounts of development time to improving the workflow of CST STUDIO SUITE, and making it easier to for users to just simulate their models.

One new feature in CST STUDIO SUITE 2014 is version control for imported CAD models. This is designed to help users working in large teams to keep track of all the changes to the device without having to reset the simulation environment for each design iteration. For instance, in many electronics companies, EM engineers might receive weekly or daily updates to the CAD data from other departments. This updated data may contain new components or remove old components, and can sometimes significantly affect the behavior of a device.

The simple example shown here is the casing for a phone, imported in CST STUDIO SUITE as a STEP file. 

The model includes an LCD screen, which is modeled as a different material and subject to local mesh refinement.

After the user imports the phone model, however, the design department updates the CAD file. The next time CST STUDIO SUITE is opened, this change is automatically detected and the software asks whether the simulation project should be updated as well.
The updated model is loaded into the project. The material and mesh settings are kept, which means that the model doesn’t need to be set up again, and the simulation can proceed as normal. CST STUDIO SUITE also keeps track of which elements have been added and removed between designs to help the user track changes and ensure that the new model is ready to be simulated.

Wednesday, April 16, 2014

Five Reasons for Going to the CST European User Conference

If you haven’t already heard of the CST European User Conference (EUC) to be held on May 7-9 in Berlin, Germany – it’s an annual event that attracts engineers from industry and academia to discuss the topics surrounding CST STUDIO SUITE® tools and future developments.
So what are the benefits of attending?

1.    User-based applications
The preliminary program has just been published and included in the schedule are customer talks from topics such as antennas, EDA, EMC, particle accelerators, high power microwaves, optics, low frequency, bio-EM, optical frequencies, metamaterials, components and high performance computing. Attendees will be able to gain in-depth insight on a range of technical applications directly from our users.

2.    Special guest speakers
This year, we have the pleasure of welcoming two special guest speakers. Dr. Wolfgang Heinrich, Head of the Microwave Department at the Ferdinand-Braun-Institut (FBH) will present a keynote talk titled, “Design and Characterization of Integrated Circuits at Frequencies Beyond 100 GHz”. Dr. Bruce Archambeault, member of the Board of Directors for the IEEE EMC Society, will be presenting two talks on EMC as well as running one of the mini training sessions in the pre-EUC program, titled “How to Manage EMC and SI on PCBs”.

3.    Industry partners
Our industry partners will be at EUC to showcase their products at the industrial exhibition. Attendees will be able to speak directly to representatives from Delcross Technologies, Magus Pty Ltd, Optenni Ltd, CADnetwork and Nvidia and find out how their products can be used together with CST software. Have a look at what they had to say at EUC 2013.

4.    Meeting CST staff
EUC provides the opportunity to ask CST staff technical questions as well as the chance to network with experts in particular application areas. Parallel to the talks, there will also be specific time slots open where our support staff will be available to answer queries.

5.    A social event at the German Bundestag
As EUC will take place in the German capital, Berlin, we have organized a social event on May 8 with a visit to the German Bundestag. The evening begins with a tour of the historical building, now used as the meeting place for the German parliament, followed by a relaxed evening dinner in the roof top restaurant.

If you haven’t already, it’s not too late to register, simply head to our website for more information.

Tuesday, April 15, 2014

Time Dependent Materials in CST STUDIO SUITE 2014

Our powerful time domain solver has long been one of our key strengths. In order to improve our transient simulation capabilities even further, CST STUDIO SUITE 2014 adds a new feature: time-dependent conductivity materials.

These materials are really useful for situations where the system undergoes a switching action or a breakdown, such as a spark gap switch. In this switch, the two poles are separated by a short gap – when the voltage across the poles becomes great enough, an arc forms and the switch closes. The path of the arc itself can be modeled as a material with time-dependent conductivity – before the spark forms, its conductivity is essentially zero, while after ionization, its conductivity is massive.

In previous versions of CST STUDIO SUITE, this system would be modeled by treating the air gap as a lumped element switch in a transient/circuit co-simulation. Time-dependent conductivity materials offer an alternative approach, with several additional capabilities beyond those of lumped elements. For one thing, the switching response can be modeled. The arc doesn’t simply come into being suddenly, it forms over a time of about 300 ps. This effect is captured by the time-dependent conductivity material.

Modeling the spark gap in 3D also means that its actual shape – for example, the radius of the arc – can be taken into account. This means that the physics of the switch can be modeled more accurately by the simulation.

A spark-gap switch, closed at 2000 ps.

Thursday, April 10, 2014

Developing new EMC simulation methods with SEISME

(Left) A TEM cell for measuring emissions from a PCB. (Right) A model of a PCB in a TEM cell in CST STUDIO SUITE, using measured data as a source.
When designing electronic systems, engineers can spend much of their time hunting and resolving potential electromagnetic compatibility (EMC) problems. With the help of the SEISME project, of which we are a member, these EMC issues should have fewer places to hide.

SEISME is a research consortium made up of industrial and academic partners based mainly in Aerospace Valley in south west France, and includes companies working in the fields of semiconductors, automotive, aviation, space and defense. As well as being French for “earthquake”, SEISME also stands for “Simulation de l’Emission et de l’Immunité des Systèmes et des Modules Electroniques” (“Simulation of Emissions and Immunity of Electronic Systems and Modules”).

The goal of SEISME is to develop new techniques to allow the EMC properties of products to be analyzed using simulation, allowing modeling to complement traditional measurements and opening new possibilities for electronic design. New components come onto the market all the time, and often engineers would like to replace an obsolete component with its newer equivalent. However, even if the components have the same function, they may not have the same EMC behavior.

At present, engineers have to analyze the EMC properties of rebuilt systems in the lab. SEISME aims to complement the testing process by devising a standardized approach for EMC simulation. The International Electrotechnical Commission (IEC) has published a specification for simulating conducted emissions on integrated circuits – SEISME will create similar specifications for both conducted and radiated emissions and immunity, not just for integrated circuits but also for PCBs and devices.

Participation in SEISME allows us to see firsthand how customers use CST STUDIO SUITE® in their workflow, and use this information to improve our EMC capabilities. We can also bring our experience of electromagnetic simulation to bear to help the engineers and researchers from SEISME’s partners to produce the specifications for EMC simulation.

The three year project started in 2011, and runs until 2014. We are excited to be part of this collaborative project to benefit engineers and shape the future standards of EMC simulation.

Tuesday, April 8, 2014

Field Source Coupling Wizard in CST STUDIO SUITE 2014

We have put the finishing touches to the latest version of our flagship simulation product, CST STUDIO SUITE®, and have recently announced its worldwide release. When developing the 2014 version, one of our major goals was to make it easier for users to combine different solver types into a multi-scale simulation flow process.

Previous versions of CST STUDIO SUITE introduced System Assembly and Modeling (SAM), which makes it possible for field results from one simulation to be used as the basis of the next. This has been developed in CST STUDIO SUITE 2014 with greater cross-compatibility between solvers and a new wizard for setting up field sources.

An antenna mounted on a car body

This feature is especially useful to engineers who work on applications such as EMC/EMI and antenna placement or who use field measurements. These applications all have in common the fact that they often require the analysis of a small radiating source in a relatively large structure – this might be a component causing interference inside an electronic device, or an antenna mounted on a vehicle.

The near-field source equivalent of the antenna (left) mounted on the car body (right).

The SAM project is set up in the Schematic view. After selecting the “Field Source Coupling” option in the Create Simulation Project tool, the software will ask which model or models should be used as sources, and which model is the target. The full system is then automatically constructed by the software, based on the anchor points of the different models.

Installed performance of the antenna, calculated with the near-field source

Simulations can be linked using both nearfield and farfield sources, depending on the requirements of the project, with numerous possible combinations of solvers. By combining different solver types, a wide range of different systems can be simulated more efficiently.

Friday, April 4, 2014

CST to Showcase EM Simulation Tools at EDI CON 2014

We are going to Beijing to visit the Electronic Design Innovation Conference (EDI CON) from April 8-10, 2014 – a show focusing on the high-frequency and high-speed electronics industry. As gold sponsors of the conference, we will be presenting workshops that look at how electromagnetic (EM) simulation can be used when designing electronic devices, touching on topics such as high-speed and signal integrity analysis as well as EMC/EMI design.

The best place to find us is at booth no. 117, but we’ll also be participating in the technical conference and co-chairing the measurement and modeling track.

Check out our schedule for the show:
  • MIMO Antenna System Simulation
Tuesday 8 April, 15:30 – 16:15 (Room D, 203 B)
Multiple-input, multiple-output (MIMO) systems are a major field of study for researchers interested in achieving high data rate communication in typical urban multi-path environments. Although a fast analysis can be based on S-parameters, this approach has limitations. A more detailed analysis needs to take into account broadband, farfield and antenna properties. These are especially important in presence of the human body. This workshop will show how simulation can be used to calculate the effect of hand and head (e.g. CTIA models) on mobile devices, MIMO for wearable antennas and different power weighting functions for different environments, along with post-processing options for envelope correlation (including spatial power weighting functions), derived quantities  diversity gain and multiplexing efficiency. Finally, there will be a demonstration of the link between CST MICROWAVE STUDIO® and Optenni Lab for multiple antenna matching to optimize power transfer to antennas while minimizing cross-coupling.
  • High-Speed and High-Power Connector Design
Wednesday 9 April, 9:15 – 9:35 (Room E, 203 C)
As data transfer rates increase and complexity grows, designing high-speed connectors is becoming increasingly challenging, especially with multiple compliance regulations to meet. A precise analysis of the connector in isolation as well as the connector and PCB interface is essential, and can be only achieved by extensive use of 3D EM simulation during the development cycle. Multiple examples, including display connectors and USB 3.0 connectors will be used to demonstrate features such as online TDR and cross-probing, with the aim of identifying impedance mismatches and discontinuities. A low-speed high-power connector analysis using multidisciplinary approaches (including electrical and thermal effects) will also be presented.
  • Simulation and Measurement: Complementary Design Tools
Wednesday 9 April, 13:30 – 14:15 (Room D, 203 B)
The usual aim of electromagnetic simulation in design is to lower the number of prototypes to reduce costs and time to market. However, this is only possible when the EM simulator is given the correct input data that accurately represents the physical device. Then an excellent agreement between simulation and measurement can be expected. There are many possible causes of discrepancies between the two, including geometric differences (over-etching, over-milling, rounded corners), material properties (anisotropic dielectrics, surface roughness), installed performance (surrounding structures) and feed discrepancies (connector modeling). In this workshop we will explore the relationship between simulation, using CST STUDIO SUITE®, and measurement, and explain what each domain is best suited for. In some situations measurement can be difficult to perform while simulation is simpler, and vice versa. Simulation allows many variations on a design to be investigated, using techniques such as parameter sweeps, sensitivity and yield analysis. We will show how simulation can be used for what-if analysis and feasibility studies at early stage of design before first prototypes. Finally, the use of measured data to calibrate simulation will be shown. This is useful for hard-to-model phenomena like surface roughness or for the modeling of low-cost adapters.
  • EDA Design Flow Panel
Thursday 10 April, 14:15 – 15:00 (Room B, 201 D)
We will be participating in this panel session.

If you happen to be in Beijing for the show, remember to drop by booth no. 117 for a chat or head to one of our workshops to get more insight on electromagnetic simulation.

Tuesday, April 1, 2014

EuCAP 2014

We always enjoy going to the European Conference on Antennas and Propagation (EuCAP). It attracts experts from all over Europe and the diverse technical program helps keep us abreast of the latest research and applications.

This year’s EuCAP takes place on 6 – 11 April, 2014 in The Hague, Netherlands. CST will not only be supporting the event as platinum sponsors, but we’ll also be taking part in a few of the show’s activities. If you’re heading to EuCAP this year, have a look at the sessions below.

  • CST Workshop on Advanced Antenna System Simulation with CST MICROWAVE STUDIO® 2014
Tuesday 8 April, 11:00 – 12:00, Room: Europe 2
  • CST Workshop on Simulation of Installed Antenna Performance with CST MICROWAVE STUDIO® 2014
Wednesday 9 April, 11:00 - 12:00, Room: Europe 2
  • CST Workshop on Advanced Antenna System Simulation with CST MICROWAVE STUDIO® 2014
Thursday 10 April, 11:00 - 12:00, Room: Europe 2

  • EVEREST Simulation Campaign Results on Multipactor Effect Using CST PARTICLE STUDIO
Wednesday 9 April, 10:00, Room: Antarctica
Ahmed Al-Mudhafar (Technische Universität Darmstadt & Institut für Mikrowellentechnik und Photonik, Germany); Jerome Peuch (CNES, France)
  • Contact-less RF and Optical Measurement of Antenna Array Active Impedance Using Scattering Data
Thursday 10 April, 17:40, Room: Amazon
Zeev Illuz (Tel Aviv University & CST AG, Israel); Amir Boag (Tel Aviv University, Israel)
  • Bringing Numerical Simulation and Antenna Measurements Together
Friday 11 April, 10:00, Room: Mississippi
Lars Jacob Fogged (Microwave Vision Italy, Italy); Lucia Scialacgua (SATIMO, Italy); Francesco Saccardi (SATIMO, Italy); Francesca Mioc (Consultant, Switzerland); David Tallini (CST, Germany), Emmanuel Leroux (CST, Italy); Ulrich Becker (CST, Germany); Javier Leonardo Arque Quijano (Universidad Nacional de Colombia, Colombia); Giuseppe Vecchi (Politecnico di Torino, Italy).


CST will also be exhibiting at the show from 7 – 10 April. Drop by our booth at the industrial exhibition site to discuss antenna simulation.