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 (