The susceptance of an annular metallic strip in a circular waveguide with incident TE/0,1/ mode
Abstract
The principal aims of this paper are twofold: (1) to solve the problem of the scattering of a thin perfectly conducting annular strip suspended in a multimodal circular waveguide in which any number of TE(0n) modes can propagate, and with the aid of this result, (2) to give the susceptance of the thin annular strip in a monomodal circular guide with an incident TE(0,1) mode. These are treated with a variational approach. Applying the appropriate Green's functions to the continuity equations for the transverse electric field yields a variational expansion for the scattering-matrix elements. This is treated with a Rayleigh-Ritz procedure and matrix methods. Curves of normalized susceptance as a function of the free-space wavelength and the size of the annular metallic strip are shown. These results are in good agreement with experimental data. Tables of the scattering coefficients for a typical wavelength versus strip size are also included.
- Publication:
-
IEEE Transactions on Microwave Theory Techniques
- Pub Date:
- February 1979
- DOI:
- 10.1109/TMTT.1979.1129579
- Bibcode:
- 1979ITMTT..27..160S
- Keywords:
-
- Concentric Cylinders;
- Microwave Scattering;
- Propagation Modes;
- Reactance;
- Scattering Coefficients;
- Waveguides;
- Annuli;
- Equivalent Circuits;
- Green'S Functions;
- Matrix Methods;
- Network Analysis;
- Rayleigh-Ritz Method;
- S Matrix Theory;
- Variational Principles;
- Electronics and Electrical Engineering