Wednesday, January 10, 2018

Top 5 CST Articles of 2017

Every year, thousands of visitors check out the technical content in CST's large library. With articles and webinars that cover all of the markets and industries that we serve, it's always fascinating to see what was most interesting to our followers.

1. A Dielectric Lens Antenna with Enhanced Aperture Efficiency for Industrial Radar Application 

One application of RADAR (RAdio Detection And Ranging) is to measure the distance to a moving or fixed object using an electromagnetic wave. The distance of the object is determined by the time difference between the transmitted and reflected wave. This article describes such a distance measurement using a RADAR system for measuring the tank filling level in an industrial storage tank.

2. Microstrip Patch Array Design

This article explains the design process for a planar microstrip patch array for WLAN frequencies using the circuit and full-wave 3D solvers and optimization tools in CST STUDIO SUITE®. 

3. Five-Section Microstrip Hairpin-Filter

This practical article covers the step-by-step simulation of a Five-Section Microstrip Hairpin-Filter.

4. Optimization of Torque in a Permanent Magnet Synchronous Motor (PMSM) for Traction Applications

This article summarizes the simulation and optimization of a 200 Hz, 8-Pole Permanent Magnet Synchronous Motor (PMSM) typically used for traction applications in automotive and transportation systems.

5. RFID Reader-Coil, 13.56 MHz

This article details the simulation of a specific  RFID Reader-Coil using CST's frequency domain solver. 

Mesh details of the tetrahedral Mesh used for the Frequency-Domain Solver in CST MWS. 

Tuesday, January 2, 2018

CST Lab: Improving design with measurement and simulation

“Why don’t my simulation results agree with the measurement?” This is the question I sometimes heard from our customers and which inspired us to start CST Lab, which is a project that promotes the combination of simulation and measurement to fix the perennial problem of mismatched results. CST Lab was officially started two years ago, and for the past 5 years we have been working in this space through our joint workshops with Rohde & Schwarz, one of the global leaders in measurement instruments and techniques. These workshops were very well received since the content went well beyond a typical product presentation. The workshops examine critical points in the design process and include hands-on learning for both measurement and simulation portions.
Recently, we introduced a two-day vector network analyzer (VNA) training course, which covers the fundamentals of microwave measurement and the obtained measured data are used during the second day for the material characterization and component modeling.

Providing customers with comprehensive technical support

CST Lab’s objective is to provide our customers with broader, application-based technical support where we deal with the overall design process instead of limiting the support to the simulation portion only.  
CST Lab at European Microwave Week 2017
CST Lab supports our customers who can benefit from our extensive knowledge concerning measurement and its interpretation. The approach is beneficial to all engineers who need to reduce the length of the design cycle making the design process more robust and reliable.  

Benefits of combining simulation and measurement

There are many benefits of combining simulation and measurement during the design stage. Each of the domains is suitable for different tasks. For instance, simulation allows us to do what-if analysis without the expensive and lengthy manufacturing process. We can employ an automatic optimization engine to improve the device parameters. Also, simulation provides an inside view of EM field visualization, which provides a better understanding of the physical mechanisms.
On the other hand, material properties, which are the critical input information for 3D EM simulation, need to be determined using the measurement of a simple, well-defined sample. Measurement is usually very fast, providing the results in real-time. Also, the measurement contains all the physical effects of the device under test (DUT).  So if we combine both domains, we can always be sure we have used the best-suited tool for the particular task.

Common misconceptions

There are a few common misconceptions or mistakes that we encounter and correct when we are working with users or giving workshops on simulation and measurement. The most common mistake is that people simulate something different than what is measured. A typical case is a microwave circuit or antenna that includes an adapter is measured, but because the engineer assumes the adapter behaves ideally, it is not included in the 3D model. However, if we look closer and measure its S-parameters, the results show that the troublemaker is in fact, the adapter. The adapter in this example can be replaced with any other piece of structure that is present in the experiment, but it is missing in the virtual model. Sometimes, a very tiny detail might cause a significant discrepancy, and it can be challenging to reveal this.
If we look at electromagnetic compatibility (EMC), we can find an example of a typical misconception. A standard initial request of a potential customer dealing with an EMC issue is: “Please put all the system including all the nonlinear circuits and mechanical parts into the 3D EM simulator and show us the agreement of emissions to our measurement”. This is a very inefficient approach since it would require a lot of time to transfer all the complexity of the device to the virtual model including, possibly, the effects of the environment where the device being tested was measured. Regardless, this approach won’t help to solve the EMC issue if the aim is just to replicate the measurement with the simulation. Instead, we recommend capturing only the most relevant portion for the principal study and finding the emission sources utilizing field visualization. As soon as we understand the how the emissions are generated, we can take action to suppress them. Typically that can be achieved just by modifying the PCB layout. Then, we may add a bit more complexity in the final step before applying changes to the physical sample to complete the verification loop.

The future of CST Lab

Our efforts with CST Lab are well received, and our customers actively cooperate since they see the benefits of combining measurement and simulation.
During the last three years, we have developed several novel workflows that speed up the design process and which enable our customers to create much more robust virtual models with an accuracy we haven’t seen before. Besides the development of further new approaches, the most critical task and challenge for the future will be the transfer of this knowledge to technical practice.   In fact, CST recently jointly presented a course from the well-respected European School of Antennas titled “Combination of Measurement and Simulation.” This is a wonderful example of companies and academia coming together to promote this approach to design.

Want to learn more? Check out these webinars in our archive and sign up with MyCST to be notified of upcoming training, workshops and other CST Lab related events.

Related webinars:

Dr. Vratislav Sokol
Senior Application Engineer

Vratislav Sokol received his M.Sc. and Ph.D. degrees in radioelectronics from the Czech Technical University in Prague in 2000 and 2004, respectively. He was a post-doctoral research associate with Cork Institute of Technology in Ireland where he dealt with an ultra-wideband transceiver. His activities are focused on microwave circuit design and modeling using electromagnetic field simulators and precise microwave measurement and calibration. He has been with CST since 2006 as an application engineer.

Thursday, November 30, 2017

What's on next week: December 4-10

It's a quiet week here at CST, the last webinar of our 2017 series will air on Thursday and we are hosting several fully booked training sessions. All the previous webinars are now available to stream, so why not check them out and catch up on anything you missed?


Precise Characterization of Multipin Connectors 

December 7th, 2017
17:00 CET (UTC +01:00)

Join us next Thursday for the final webinar of our 2017 series.
Connectors are an integral part of any electronic system, allowing multiple parts of one system to interconnect. However, they represent a discontinuity, and this discontinuity causes reflections, differential-to-common-mode conversion and radiation. All these phenomena are more intense at higher frequencies and they can significantly distort the transmitted signal which leads to the reduction of transmission speed/bitrate.


December 5th-6th, 2017
Vélizy-Villacoublay, France

CST STUDIO SUITE - Low Frequency Training
This event is full
December 5th, 2017
Darmstadt, Germany

CST STUDIO SUITE - Microwave and Antenna Training
This event is full
December 5th-6th, 2017
Darmstadt, Germany

This event is full
December 5th-6th, 2017
Darmstadt, Germany

Tuesday, November 28, 2017

CST Automotive Conference 2017: A great success

This year's Automotive Conference in Neckarsulm, Germany was booked to capacity as we welcomed attendees from 14 European countries as well as the US, Singapore, and Japan. Companies represented included Audi, BMW, JLR, Renault, Volkswagen, Volvo as well as tier 1 & 2 suppliers including Autoliv, Brose, Continental, Delphi, MAGNA, Rheinmetall Automotive, Robert Bosch, TE Connectivity, Valeo, Yamaichi as well as several research institutes, universities and service providers.
We held a panel discussion at the end of the conference with representatives from Audi, BMW,
Continental, Robert Bosch and TE Connectivity discussed how to better cooperate regarding simulation, how to define requirements, how to validate them, how to exchange simulation models and how to deal with the many variants and car models. It was nice to hear BMW and Bosch saying, that using a combination of CST STUDIO SUITE and the 3DEXPERIENCE platform would be probably the best and most efficient way to guarantee smooth workflows and fruitful cooperation.

See the full program of presentations here.

This is the fourth year in a row that CST has held a dedicated conference for the automotive industry. In 2014, we held the first automotive related conference in Bundang near Seoul, Korea. We realized that specific conferences are more interesting for our customers and prospects than general EM workshops. That first conference was a success with good attendance which we credit to its original content as a specialists meeting.

In 2015 CST held our second automotive conference at BMW World Munich and again, we were impressed by the number of attendees who came out. We were asked to have the conference on a regular basis, and many of the attendees told us that it was both informative and beneficial for networking as the conference provides a non-competitive environment for the exchange of ideas in the industry.

In 2016, CST held the third conference at the Henry Ford Center in Detroit, as with previous conferences, it was well received and according to an attendee-“A perfect platform for knowledge exchange.” These words could easily describe this year's conference as well, so thank you to everyone to attended, we could not do this without you!

We look forward to continuing engagement with the automotive industry as it continues to innovate and evolve. 

To learn more about upcoming CST events that might interest you, check out our website.

Matthias Tröscher
Business Development Manager
Germany, Austria & Switzerland

Wednesday, November 22, 2017

What's on next week: November 27-December 3

We've got a busy week ahead with plenty of training and we're excited to present the next installment of our webinar series. We just wrapped up several workshops and our 2017 Automotive Conference. We hope to see you at in Marseille if you are attending and be sure to register today for our Thursday webinar.


Electromagnetic Environmental Effects (E3) Simulation

November 30th
17:00 CET

This presentation focuses on the simulation of E3 including lightning strikes, high-power electromagnetic pulses (EMP) and high intensity radiated fields (HIRF). Simulation is playing an increasingly important role in evaluating system performance when subjected to E3 and investigating strategies for protection. A new approach in CST Studio for modeling radiated susceptibility using a virtual reverberation chamber model will be presented.

Register today.


Mediterranean Microwave Symposium 2017 

Nov 28th-30th, 2017
Marseille, France

The 17th edition of the Mediterranean Microwave Symposium (MMS 2017) is one of the best conferences to discover the newest developments in RF / microwave and antenna technologies. The conference will cover topics such as Microwave-Media Interactions, Microwave Metrology, Measurement Techniques, Microwave and Millimeter-wave Components, Circuits and Devices, Energy Harvesting, Antennas and Telecommunication Systems, IoT, Propagation, Scattering and Diffraction, 3D Printing for Microwave Applications and a lot more.



Nov 28th-29th, 2017
Dolni Brezany, Czech Republic

CST STUDIO SUITE - Microwave and Antenna Training 

Nov 28th-29th, 2017
Dolni Brezany, Czech Republic

CST STUDIO SUITE - Signal Integrity and Power Integrity Training 

Nov 28th-29th, 2017
Framingham, MA, United States


Nov 28th-29th, 2017
Framingham, MA, United States

Friday, October 20, 2017

A look back at European Microwave Week 2017

CST Modeling Challenge in action!
Exploring Wi-Fi signals in a bus with VR
This year's European Microwave Week, which ran from October 8-13 was a wonderful success for CST. We sponsored the wifi for the exhibition and our booth was busy as we welcomed attendees to learn more about CST STUDIO SUITE and electromagnetic imulation. One of the highlights was our ever popular CST Modeling Challenge. This year, we asked attendees to model and simulate a simple waveguide filter. We were impressed with the entrants’ work, and surprised by the interest – our computers were often all in use. Everyone who successfully completed the challenge received the classic Nuremberg delicacy: a Lebkuchen (gingerbread) heart and were entered into a raffle to win prizes
at our booth party.

We provided demonstrations in the CST lab on the finer details working with both EM simulation and measurement, providing a preview of the joint "Measurement Meet Simulation" workshops we run with Rohde & Scwarz throughout the year.

CST Measurement Meets Simulation demonstration.
The CST booth also featured a demonstration with virtual reality glasses that gave people the chance to see EM fields in 3D and explore them digitally. With VR, people could see Wi-Fi  signals propagating through a bus and see
how signals can jump from one PCB trace to another causing crosstalk. We had a great deal of fun meeting old friends and new who came to try for themselves.

On Wednesday afternoon, we held our booth party and the winners of the Modeling Challenge were announced and picked up their prizes from Samsung, Bang & Olufsen and Bose. The party featured local food and drinks and was well attended and we're already looking forward to European Microwave 
The lucky draw marked the end of our modeling challenge
Week 2018 in Madrid!

Martin Timm
Director, Global Marketing
CST-Computer Simulation Technology

Wednesday, October 18, 2017

What's on next week: October 23-29

Next week, CST will present two fascinating webinars on Tuesday and Thursday. Register today to learn from CST experts as they walk you through simulation strategies and analysis. We will also be attending several exhibitions, including the IME/China in Shanghai. Read on for the details on where you can meet us and learn with us.


RF Co-Site Interference Simulation in Complex Electromagnetic Environments

October 24th 2017
08:00 PDT (UTC -07:00)
Approx. 60 min

In this webinar, we will demonstrate how a 3D full-wave simulation can be used to analyze the antenna to antenna coupling for an Unmanned Aircraft System (UAS). The coupling data will then be used to estimate possible RF interference using one of the newer products of CST STUDIO SUITE: The CST Interference Task. With this new system-level tool, RF systems can be defined to analyze inter-system coupling. The analysis delivers the possible occurrence of RF interference at a glance. The interference task is fully integrated into the CST design environment, making it easy to run different scenarios and test mitigation strategies after the detection of possible interference.
Register here

Automotive Radar SimulationWebinar Series 2017

October 26th 2017
17:00 CEST (UTC +02:00)
Approx. 60 min

Automotive radar is becoming increasingly important for car designers, due to the huge role it plays in securing and ensuring the driver’s safety. In this webinar, we will show how CST STUDIO SUITE can be used to perform and study all of the design stages of automotive radars, starting from the basic element which is the antenna, through its integration inside a radome, to actually placing and calibrating the whole package inside the car, using CST Complete Technology’s versatility and solver diversity.
Register here


Radar 2017 

Belfast, United Kingdom
Oct 23rd-26th, 2017

RADAR 2017 is the world’s premier international conference making a welcome return to the UK and the vibrant city of Belfast, Northern Ireland. The conference focuses on the challenging topics of radar theory and applications covering many aspects of radar systems for defence, security and civilian applications.

Space Tech Expo Europe 2017 

Bremen, Germany
Oct 24th-26th, 2017

The free-to-attend Space Tech Expo & Conference is Europe's meeting place for space business, technology & innovation. The three-day trade fair will showcase the latest from technical designers, sub-system suppliers, manufacturers and components through the systems integrators for civil, military and commercial space.Visit us at booth #F72

IME/China 2017

Shanghai, China
Oct 25th-27th, 2017

China International Conference & Exhibition on Microwave and Antenna (IME/China), which is one of the largest and most influential Microwave and Antenna exhibition in China, will be a good platform and channel for technical exchanges, business cooperation and trade promotion between global Microwave and Antenna products & technology suppliers and Chinese Microwave and Antenna customers. IME/China is a must-attend event for design engineers, technical managers and purchasing executives in China.

Visit us at booth #A082