Wednesday, June 20, 2018

On the Road to Design Success with CST STUDIO SUITE : a new hands-on workshop series

From June 22-29, 2018 we will be traveling through Germany and Switzerland providing hands-on workshops using CST STUDIO SUITE®. We sat down with Dr. Matthias Tröscher to talk about what makes the On the Road workshops different and useful for our customers.

1. What was the motivation behind this series? What gaps were you trying to fill? 

We have offered traditional workshops with PowerPoint presentations and online demos as well as traditional trainings for EDA, MW&RF, EMC and other applications. We came up with our “On the Road” workshop series because we realized that there was interest in an easy-to-understand, timely, limited training with CST STUDIO SUITE®.

2. What makes this series different from our standard workshop series? 

We’ve moved away from our typical full-day workshop and introduced individual morning and afternoon sessions and attendees can choose between them or attend both.

There will be one dedicated example per session. In the morning, EMC, and afternoon, MW antenna design. The focus will be on having hands-on experience rather than listening to an instructor and watching a presentation.

3. What can users expect from these workshops?
These workshops will help attendees understand how electromagnetic simulation works and see how easy it is to run simulations with CST STUDIO SUITE®. They will run simulations in the time and frequency domains and couple 3D field simulation with network simulation. All of the do-it-yourself experiences will of course benefit from active support by CST experts.

Interested? Register here for a workshop near you. 

Dr. Matthias Tröscher 
Business Development Executive 
Transportation & Mobility 

Tuesday, June 19, 2018

A look back at EUC 2018

The 13th CST European User Conference (EUC) took place from June 4-6, 2018 at the INFINITY Hotel & Conference Resort Munich in Unterschleissheim.

EUC began on Monday with compact seminars on Electromagnetic-Thermal Co-Simulation, Antenna Installed Performance, Simulation Automation and Comparison of Measurement and Simulation on a Vector Network Analyzer. These seminars were very popular and provided a wealth of information in a short time, and were a welcome addition to EUC.There was also the opportunity to learn about strategy and innovation from Dassault Systèmes SIMULIA.

The official opening  of EUC took place on Tuesday morning with two keynote presentations. First, Prof. Claudio Paoloni, Head of the Engineering Department at Lancaster University, talked about the requirements of ever increasing data traffic to networks. His special focus is the development of cost-effective traveling wave tubes in the millimeter-wave range.

The second keynote, “A Coherent Lidar Utilizing Antenna Coupled MIM Sensors”, came from David Ben-Bassat, founder of Oryx Vision. Lidar, light detection and ranging, is a technology that provides information on the
environment of autonomous driving vehicles. In his presentation, he introduced Oryx Vision's approach to solving some of the typical challenges of Lidar technology.

The rest of the program included topics such as e-mobility, antennas for many applications, microwave components, the propagation of electromagnetic fields in the human body, as well as insights into current research and development activities. Presentations from EUC will be made available on our website.  To download them, users will simply need to set up a MyCST account.

Dr. Martin Timm
Marketing Director SIMULIA EMAG

Wednesday, June 13, 2018

New whitepaper: Designing a Compact Ridged Waveguide Filter

Designing a Compact Ridged Waveguide Filter

Multi-mode cavity filters offer high power handling and good performance as a compact device. Such filters are complex and sensitive to changes in the structure, meaning that their design can be time-consuming or even impossible with conventional methods. This article shows how the CST® filter synthesis tool Filter Designer 3D, part of the simulation software CST STUDIO SUITE®, can be used to design and tune a multi-mode compact ridged waveguide filter to meet stringent specifications.

The proliferation of mobile communication systems and protocols mean frequency spectrum
utilization is increasingly restricted – realizing the stringent channel specifications require high-performance band-pass filters. Satellite systems in particular are very exact in frequency, power, size and weight requirements: the filter response should produce steep cut-off to avoid channel interference and adhere to different standards, but size and space are typically restricted. Cavity filters are typically the preferred choice due to their power handling capabilities, but they are often bulky and heavy. Multi-mode cavity filters are therefore an attractive alternative. They use a number of modes in a single cavity, which significantly reduces the overall size. They also allow cross-couplings between cavities for a better filter response, which is not always possible for single mode resonators due to physical restrictions.

There are several simulation techniques that can be used in the tuning process of coupled-resonator filters. One traditional approach is to sequentially build up the filter by adding only one resonator at a time, while the group delay of the reflected signal is used as the figure of merit for the optimization. Another approach is to apply the inverse chirp Z-transformation to the reflected signal and from the transient response identify the individual detuned resonators and couplings. It is also possible to add additional ports to the full-wave simulation model and connect lumped components in a coupled schematic for space mapping[. All of these techniques typically involve using an equivalent circuit as a surrogate model where intermediate results can quickly be obtained as a reference during the process.