CST E-News, May 2010

Welcome to the May edition of CST's E-News, our series of regular news and feature updates. We hope that you find the contents relevant, interesting and informative. Should you receive this email more than once, please accept our apologies. Any feedback and suggestions for future editions is welcome.

News in brief

  1. Free Cadence / CST Webcast
  2. Enhancements in CST MWS Asymptotic Solver
  3. New Functionality for CST MWS Frequency Domain Solver in Version 2011
  4. Sensitivity Analysis and Adapted Optimization Strategies for Transient Solver
  5. New Customer Support Ticket System Released
  6. Technical Presentations at MTT-S IMS
  7. Antenna Magus Version 2 - Expanded Database and Antenna Array Synthesis Tool
  8. CST STUDIO SUITE 2010 Webinar - International Versions Available
  9. Calendar of Events

Free Cadence / CST Webcast

Free Cadence / CST Webcast

Cadence and CST are presenting a webcast demonstrating advances resulting from their technical cooperation: "Integrated 3D Full-Wave Analysis of Mixed Signal 3D Packages", June 23, 10:00 AM - 11:00 AM Pacific.

As multiband devices shrink and frequencies increase, the layout of packages, system in packages (SiP) and PCBs is becoming increasingly critical to maintain good signal and power integrity and to meet radiated emission requirements. Rule checkers can help to some extent, but electromagnetic field simulators are required to see the full picture, both in pre-layout analysis and post-layout verification. Most layout tools have 2D simulators available that can offer good insights, but for high accuracy and to address layouts with non-planar elements such as wirebonds, a full 3D simulator is mandatory.

CST has offered a plug-in to Cadence tools for some years and more recently a direct import has become available that offers component recognition, layer editing and net and area selection. A major collaborative project now enables Cadence layout engineers to stay within their familiar environment while performing a full wave 3D extraction and EM analysis in the background. Results are back annotated to the Cadence environment. This "EDA centric" viewpoint vastly simplifies the workflow required to achieve design goals.

You can find more information and webcast registration for "Integrated 3D Full-Wave Analysis of Mixed Signal 3D Packages" here.

Enhancements in CST MWS Asymptotic Solver

Engineers simulating electrically large structures, either for radar cross section analysis or for antenna placement studies, benefitted from the introduction of an asymptotic solver in CST MICROWAVE STUDIO® version 2010. This solver is based on the shooting bouncing ray method. With the latest CST STUDIO SUITE 2010 service pack, significant functional enhancements have been made available to our customers.

The asymptotic solver can now use farfields as excitation sources. These farfields can be computed by other CST MWS solvers including the transient and frequency domain solvers.

This makes the calculation of the installed antenna´s farfield possible, even for an electrically very large structure such as a ship. Importing more than one farfield enables the computation of the coupling between several antennas, or of the total farfield including all antennas.

For scattering simulations, many excitation sources can be run in parallel. Their properties can be set by means of an excitation list. This enables the simulation of an arbitrarily polarized wave incident, or an incident from different directions. This is interesting in many radar applications.

New Functionality for CST MWS Frequency Domain Solver in Version 2011

Engineers designing narrowband or high Q structures, working with the CST MICROWAVE STUDIO® (CST MWS) frequency domain solver offers some natural advantages. Additionally, it is often used to crosscheck results with the transient solver for even greater confidence. The introduction of "True Geometry Adaptation" in CST MWS version 2009 represented a major milestone for the derivation of reliable and accurate results for RF FEM solvers.

With version 2011, the CST MWS frequency domain solver will feature curved elements of arbitrary order.

In comparison to using simpler curvilinear elements (first order curved elements), which often suffer from the creation of inaccuracies in the mesh representation, the implementation of higher order curved elements means that the approximation of arbitrary surfaces is much smoother. As with all mesh adaptation schemes, simulations will only converge to the correct results, if mechanisms such as True Geometry Adaptation are used. These actually improve the representation of the input model continuously, rather than simply refining the first discretization of the model.

The arbitrary order curved elements will also be available for the CST MWS eigenmode solver and the fast resonant solver.

The CST MWS frequency domain solver's simulation performance will be further improved by the introduction of domain decomposition. By breaking down the initial problem into several smaller parts that are distributed to a compute cluster, larger and more complex problems can be solved faster. This implemented method promises super-linear speed-ups, even for large numbers of participating nodes.

Sensitivity Analysis & Adapted Optimization Strategies for Transient Solver

An efficient sensitivity analysis for the CST MWS transient solver will be implemented in version 2011. The sensitivities can be used in the transient as well as the frequency domain solver for yield analysis and fast optimization. The latest addition to this solver will help them to speed up parameter studies and optimization of RF-components significantly.

One of the key advantages of the CST MWS transient solver is the efficient computation of broadband s-parameters and field results in one single simulation run. The newly implemented sensitivity analysis will be capable of evaluating the s-parameter dependencies on various model parameters on the basis of one simulation. This means that all further evaluations for different model parameter sets can be derived without restarting the full-wave simulation, thus offering users a considerable speed-up. Yield analysis for complex three dimensional models is becoming available at virtually no additional computational cost.

The benefit of the sensitivity analysis will be further increased by the implementation of special optimization techniques. Minimax and Trust Region mechanisms work on parameter models created by the sensitivity analysis to find optimal solutions for the given goals, without rerunning the simulation. The proposed optimum can be verified by a 3D simulation, thus reducing the number of costly full simulations drastically. These optimization strategies will also be available for the CST MWS frequency domain solver, for which sensitivity analysis was released in version 2010.

New Customer Support Ticket System Released

In order to accommodate CST's growing customer base and reinforced support team, we have introduced a new support ticket system which enables flexible communication with our technical experts. This system gives customers an excellent overview of their requests and provides easy access to all communication and attachments related to a certain topic. We would like to encourage every user to login to our support area on www.cst.com/support and give it a try.

Technical Presentations at IEEE MTT-S IMS, May 25 - 27 Anaheim, CA

Technical Presentations at IEEE MTT-S IMS,  May 25 - 27 Anaheim, CA

CST will be hosting a full program of application and technology talks on booth #2924 on all 3 days of the show. Topics will include phased arrays, metamaterials, RCS, sensitivity analysis, heating and mechanical stress. You can download the full agenda here .

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