Fast and accurate mode-spectrum analysis of waveguide structures using a new set of edge-conditioned basis functions
✍ Scribed by John M. Damaschke; Smain Amari; Jens Bornemann
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 255 KB
- Volume
- 8
- Category
- Article
- ISSN
- 1096-4290
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✦ Synopsis
A new set of edge-conditioned basis functions is used to determine the modal characteristics of a large variety of nonstandard waveguide structures. Since the electromagnetic field includes the proper edge conditions at metallic corners and since the new basis functions are readily Fourier transformed, a considerable reduction in computational effort with respect to standard modal field-matching techniques is observed. Similar to procedures involving other known sets of applicable basis functions, the analysis achieves a higher reliability level, as it completely avoids relative convergence phenomena.
The method is demonstrated at the examples of several waveguide structures, such as the L-shape, T-shape, and cross-iris-shape waveguides; the rectangular coaxial waveguide; and the ridged circular waveguide. Results for the cut-off wave numbers of TE and TM modes are shown to be in excellent agreement with those from standard modal field-matching techniques and previously published data.