Compact broadband planar orthomode transducer - AstrophysicsReport as inadecuate

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Abstract: We present the design and test results of a compact C-band orthomodetransducer which comprises four rectangular probes orthogonally arranged in acircular waveguide, designed to work in the WG13 band. Measurements of thesystem in the frequency range 4.64 GHz to 7.05 GHz agree very well withsimulation results and show a cross-polarisation level below -58 dB, a returnloss of about -20 dB, and an insertion loss difference of less than 0.18 dBbetween the orthogonal polarisation modes across the full waveguide band.

Author: P.K. Grimes, O.G. King, G. Yassin, M.E. Jones


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