Friday, April 20, 2018

Announcing the 2017 YEP Award winners

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.

We spoke to this year's winners about their work and their experience with CST STUDIO SUITE the winners came from the National Defense Academy and the University of Yamanashi.

"A Linear Array Antenna of Microstrip Patch Antennas Fed by the Open-End of Coplanar Waveguides" by Toshihisa Kamei, Hiromi Shima, Syotaro Fukuda, Seishiro Ishii of the National Defense Academy 

Dr. Toshihisa Kamei
"It is our great pleasure that our recent paper [*] has been honored with the YEP Award. In this paper, we presented a 4-element linear array antenna using four 20 GHz band microstrip patch antennas. The signal is fed to the patch antennas from open-end coplanar waveguides without contact. We investigated factors related to the design of linear patch antenna arrays. Our group is working on communication, meteor burst communication systems, fundamental and
applied research of radio wave absorbers in the millimeter wave and microwave band from MHz to THz.
Our lab has been using CST for over 10 years. Based on the direct calculation along with realistic excitation ports and probes, we are able to model and investigate any novel structures on CST. CST STUDIO SUITE also serves as the best tool for our students to learn Maxwell’s equations and a common language. We believe that CST Software is very convenient for university education and research and allows quick testing of new and difficult ideas at a low cost.' - Dr. Toshihisa Kamei

[*] Toshihisa Kamei, Hiromi Shima, Syotaro fukuda, Seishiro Ishii

A Linear Array Antenna of Microstrip Patch Antennas Fed by the Open-End of Coplanar Waveguides, Pub. Date: April 14, 2017DOI:10.4236/wer.2017.820

“A Novel REBCO Wire Structure That Improves Coil Quality Factor in MHz Range and its Effect on Wireless Power Transfer Systems” by N. Sekiya and Y. Monjugawa of the University of Yamanashi

Dr. Sekiya's lab students
"We would be greatly honored to receive the CST YEP AWARD2017 for our published paper [*]. We also appreciate the cooperation between our lab students and CST support.

In this paper, we described the development and application of superconducting wire which realizes low losses at high frequencies. Conventional superconducting wire has no loss in direct current, but a high loss at high frequencies. That is why the application in this field has not developed. To solve this problem, we propose a new superconducting wire structure and investigate its effect through simulation and experimental verification.

Superconducting wire requires a substantial amount of time to calculate because they have a multilayer structure. As our lab had the small number of staff, we needed to proceed our research effectively. Under these circumstances, CST STUDIO SUITE helped us to proceed our research more efficiently. We will continue to use CST STUDIO SUITE to create innovative research." -Dr. Naoto Sekiya
Dr. Naoto Sekiya

[*] N. Sekiya and Y. Monjugawa, “A Novel REBCO Wire Structure That Improves Coil Quality Factor in MHz Range and its Effect on Wireless Power Transfer Systems”
Learn more about our academic programs here. 

Thursday, April 19, 2018

Featured whitepaper: Optical Materials in CST STUDIO SUITE

CST recently published a new whitepaper about simulating special optical materials in integrated components with CST STUDIO SUITE®. 

For many optical applications, materials are needed with anisotropic or nonlinear
properties. Two important examples of such properties are birefringence and dichroism.
Such materials exhibit different refractive indices and attenuation for orthogonal optical
polarization states. They are used to alter the polarization state of the light for example in
polarizers or polarization converters. A special case of a polarization dependent material
property is magneto-optical activity. Magneto-optical active materials can also be used to
alter the polarization state, but more importantly they can be used to build non-reciprocal
components like isolators. Further, the optical properties can not only depend on the state of
polarization but also on the electric field amplitude of the light wave. The optical properties
can depend on the second, third power or even higher powers of the electric field. Here,
the effects and applications are vast – amplification, frequency conversion, and all-optical
switching to name but a few.

To learn more, read "Optical Materials in CST STUDIO SUITE"

Wednesday, April 11, 2018

Submit to the CST University Publication Award

The deadline to submit your work for the CST University Publication Award is April 15, 2018. To honor the work that is done using CST STUDIO SUITE® at institutions around the world, we present the CST University Publication Award. Past awardees have pioneered breakthroughs in a wide range of fields. The winners' respective university institutes will recieve upgraded licenses for one year.

We recently published an interview with one of the 2017 winners about their breakthrough in filter design for satellite communications using CST STUDIO SUITE®You can see all of last year's winners here: 2017 University Publication Award Winners

Work published April 1, 2017 - March 31, 2018 can be submitted for our University Publication Award. The submission must be in English and should also state the place of publication. Only one paper per candidate will be considered so please limit your submissions to one paper.

Friday, April 6, 2018

NVIDIA Quadro GPU acceleration in CST STUDIO SUITE®

The high memory bandwidth and parallel processing abilities of GPU cards mean that GPU computing can provide significant simulation speed advantages over conventional CPU computing.  A series of comparative analyses were carried out to test the performance of NVIDIA’s Quadro GP100 and the brand new GV100 device, pictured below in Figure 1. These tests were performed using various models which represent typical applications that are simulated in the CST STUDIO SUITE® Time-Domain Solver.

Figure 1 - The NVIDIA Quadro GV100 features 5120 CUDA cores, 32GB of HBM2 memory, 7.4 TFLOPs double precision performance and a remarkable 900GB/s memory bandwidth, making it the fastest GPU device for simulation acceleration.

An initial study was done to compare the Quadro GP100 and Quadro GV100 against a high-end CPU model of the Intel Xeon Broadwell family. The CPU vs. GPU performance in Figure 2 shows that the NVIDIA Quadro devices can provide a significant speed-up to the Time-Domain Solver Loop*. On average, the latest GV100 model is shown to perform about 8 times faster than a high-end CPU; the performance of the GP100 model is not too far behind with an average speed-up factor around 7.

Figure 2  - The above plot represents the solver loop speed-up factor due to GPU computing, in reference to Dual Intel Xeon E5-2643 v4 CPUs with 12 physical cores, 3.4GHz clock, DDR4 2400MHz memory modules, on a Windows Server 2012 R2 system.

In another test, a direct comparison of the GP100 vs. GV100 was performed. The benchmark results shown in Figure 3 illustrate the GV100 performs about 20% faster than the GP100 device. This is in-line with what is expected, since the solver speed-up tends to be proportional to the difference in memory bandwidth of the GPU devices. The new Quadro GV100 device has an impressive memory bandwidth specification of 900GB/s vs. the GP100 at 732GB/s.

Figure 3 - The above plot represents the Solver Loop percentage speed-up (%) provided by the Quadro GV100 in reference to the Quadro GP100.

Along with high memory bandwidth and parallelization capabilities, NVIDIA Quadro GPU devices have many additional noteworthy features. For instance, select Quadro cards can be utilized for the CST STUDIO SUITE double-precision solvers due to their powerful performance capabilities in this aspect. The Quadro GP100 and GV100 cards have fast double-precision performance at 5.2TFLOPs and 7.4TFLOPS respectively. The new Quadro GV100 also provides a significant increase in GPU RAM at 32GB making it very suitable for larger and more demanding tasks, which have not been possible for single GPU devices thus far.

In parallel to their computational acceleration capabilities, Quadro series GPU cards can be utilized for their accelerated graphics capabilities; this means there is no requirement for an additional adapter. Quadro cards are specifically dedicated to CAD/CAE applications and well tested with CST STUDIO SUITE, making them the recommended option for display. They are also a particularly interesting option for those who are interested in a GPU dedicated for a workstation over a server-class system. Since these devices are actively cooled, they can be installed into a workstation chassis, which tends to be a more cost efficient option for simulations which can be solved within the resources of a single system.

NVIDIA just announced the release of the NVIDIA Quadro GV100 at the end of Q1 in 2018. This device is scheduled to be supported in CST STUDIO SUITE 2018 Service Pack 4 for the Time Domain solver. Full support of the GV100 for all GPU-empowered solvers will become available in the next major release. GPU-empowered solvers consist of: Transient FIT & TLM, Particle-in-Cell, Asymptotic, Integral-Equation, Multilayer and Conjugate Heat Transfer solvers. The NVIDIA Quadro GP100 device, which was also used in this study, has been fully supported since CST STUDIO SUITE 2017 Service Pack 2.

*Note that the solver loop time is not a representation of the total simulation time. The solver loop is the main, and most compute intensive phase of a time-domain simulation. The solver is the only phase of the simulation which takes advantage of GPU computation.

 Melissa Reis 
 Application Engineer
 CST of America