Field theory analysis and design of multiport branch-guide couplers for contoured beam antennas
DOI:
https://doi.org/10.1109/ICATT.2003.1238861Keywords:
reflector antennas, contoured beam antennas, beam forming networks, multiport branch-guide couplers, Galerkin's method, scattering matrixAbstract
A rigorous and efficient full wave theory of multiport branch-guide couplers for contoured beam antennas is presented. Contoured beam antennas find wide use in modern satellite communication systems. The key element of these antennas is a beamforming network incorporating multiport branch-guide couplers to generate the necessary amplitude and phase distribution on the aperture feed.
The analysis of 2N-port branch-guide couplers is based on Galerkin's method taking into account the field edge condition and a generalized scattering matrix method. Numerical results are in a good agreement with the theoretical and experimental data of other works. Some optimized multiport branch-guide couplers are considered.
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