FSS QDAS Demo Software Download

Q-par Angus is pleased to announce a new Frequency Selective Surface design capability for application in the following areas: Radome design with frequency filtering characteristics, Composite Radar Absorbent Material improvements, Free-space polarisation transformers (e.g. linear to circular), Switchable (active FSS) surfaces, & Microwave diffraction gratings. The software runs only under Linux and although fully functional, is limited to 25 basis function maximum per FSS.

FSS Design Capabilities with QDAS

Version 1.21

Q-par Angus is pleased to announce a new Frequency Selective Surface design capability for application in the following areas:

• Radome design with frequency filtering characteristics.
• Composite Radar Absorbent Material improvements.
• Free-space polarisation transformers (e.g. linear to circular).
• Switchable (active FSS) surfaces.
• Microwave diffraction gratings.

Our aim is to engineer solutions to all microwave concepts involving FSS. An important element to our design capability has been the development of in-house software for the analysis of general FSS composites, QDAS (Q-par Dichroic Array Software). QDAS is a powerful tool that features some novel analysis techniques and, we believe, would be of interest to other electrical engineers.

So why should you take our word for it? We don't believe you should. In consequence, we have decided to release a limited version of QDAS, for use on Linux systems only, together with a complete set of documentation describing the mathematical formulation and use of the software.

Test it for yourselves and see. This version places a limit on the complexity of the FSS structure (25 basis function maximum per FSS) but allows studies of multiple FSS, close inter-FSS coupling, arbitrary materials etc. (Please note that we have no current plans to release an unlimited version and can not offer free software support). We hope you will find it of interest.

If you have any particular questions on the design or operation of this software or would like to know more about it, please email fss@q-par.com

How does it work ?

In brief, the software allows the modelling of an arbitrary layered dielectric sandwich with a periodic conducting or partially conducting pattern of elements or slots on each interface. Any design is permitted using triangular basis functions. The periodicity is described by a unit cell, not necessarily rectangular, and possibly different on each interface (though in the latter case only primary mode coupling is permitted).
Some attention has been given to novel formulation, especially in the manner of coupling closely bound structures.

The principal outputs are the reflection and transmission coefficients for the dominant rays and grating lobes (if there are any).

Before downloading the demo software, please register with us .....

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