An x‐band waveguide orthomode transducer with integrated filters

Abstract

This letter presents a novel waveguide orthomode transducer (OMT) with integrated filters. Resonator‐based bandpass filters are used for the two channels forming a duplexing OMT. As an example, a two‐channel duplexing OMT is designed with channels at 9.9‐10.1 GHz and 10.9‐11.1 GHz. A good filter response with 20 dB return loss is achieved for both the channels. The upper and lower bands are isolated to −80 dB due to the filtering elements and a transmission zero. This new multifunction compact filter‐OMT design leads to the size reduction and improved inter‐band isolation. A CNC machined waveguide OMT is demonstrated and its performance is verified with excellent agreement between the electromagnetic wave (EM) simulation and measured results.

Integrated Filter–Amplifiers: A Comprehensive Review

“…Resonator-based filter matching approaches can also be employed to provide the desired matching for other types of microwave circuits with complex port impedance. For example, we have demonstrated this on filter-amplifiers with different topologies [19]- [21], orthomode transducers [25],…”

Terahertz waveguide multiplexers: A review

“…The primary cause may be air gaps between layers and imperfection in coating walls. The resonator-coupled multiplexers with excellent performance have been widely designed in the microwave band, 46,47 but the performance will be degenerated when extending to THz frequencies. It is remarkable that the first THz resonator-coupled multiplexer developed in Skaik et al 36 can provide an important basis for future development.…”