Transmit and receive diplexer for circular polarization

摘要: A diplexer for processing polarized energy at separate transmit and receive frequencies. The nature of the polarization may be circular, linear or elliptical depending upon phasing associated therewith. comprises a waveguide having first second ports disposed opposite ends thereof. symmetrical bandpass resonator arrangement is around periphery couples frequency out waveguide. bandstop also filters to prevent coupling received port. resonators each arrangements generally include tuning members that control amount coupled from adjust balance components maintain state plurality rings diposed adjacent port compensate impedance mismatch caused by external ring provided compensates arrangements. an overmoded structure permits propagation higher order modes in energy. symmetry inhibits prevents excitation these hence not through Similarly, scattering improves performance diplexer.