Potter Horn and Compact Orthomode Transducer at 150 GHz

A Potter horn and a compact orthomode transducer operating at 150 GHz are designed using full wave analysis. The Potter horn patterns have good symmetry within the main beam, the sidelobe level is less than -35 dB, and the cross-polarization level reaches 21 dB. The transmission test results of the orthomode transducer and feed horn show that the bandwidth (S-11 < -20 dB) is 16 GHz. The whole dimension is only (25 mm x 20 mm x 70 mm), whereas the orthomode transducer dimension is (25 mm x 20 mm x 30 mm).