Nonsymmetrical H-plane corners for TE/sub 10/-TE/sub q0/-mode conversion in rectangular waveguides

Compact high-efficient TE
₁₀
-TE
_q0
-mode converters based on truncated H-plane angular junctions of single-mode and overmoded rectangular waveguides are designed and investigated. The comparison analysis of converters without and with an inductive iris in the input port is carried out. Iris-free converters are broader in bandwidth, while iris-matched ones provide a better purity and higher conversion efficiency. It is found that the same configuration can provide a high-efficient conversion to different TE
_q0
modes in different parts of the frequency operation range. Two interpretations of the conversion physical mechanism are discussed