Cross-coupled dual-stub waveguide filter
AssigneeLockheed Martin Corporation
InventorJason Stewart Wrigley
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Abstract
Provided herein are various enhancements for waveguide filters. A waveguide structure includes a series of iris-coupled resonant cavities forming a waveguide filter folded at a midpoint and having at least one cross-coupling established between non-adjacent resonant cavities. Resonant cavities at ends of the waveguide filter comprise bends coupled to ports arranged perpendicularly to a remainder of the resonant cavities. Stubs are included having inputs coupled at the ports and comprising short-circuited resonant cavities aligned parallel to the iris-coupled resonant cavities.
Claims20
A waveguide structure, comprising:
- a series of iris-coupled resonant cavities forming a waveguide filter folded at a midpoint and having at least one cross-coupling established between non-adjacent resonant cavities, wherein end resonant cavities of the waveguide filter comprise bends coupled to ports arranged perpendicularly to a remainder of the resonant cavities;
- and
- stubs having inputs coupled at the ports and comprising short-circuited resonant cavities aligned parallel to the iris-coupled resonant cavities.
A method, comprising:
- forming a waveguide filter having a series of iris-coupled resonant cavities folded at a midpoint and having at least one cross-coupling established between non-adjacent resonant cavities, wherein end resonant cavities of the waveguide filter are formed to comprise bends coupled to ports arranged perpendicularly to a remainder of the resonant cavities;
- and
- forming stubs having inputs coupled at the ports and comprising short-circuited resonant cavities aligned parallel to the iris-coupled resonant cavities.
Dependencies are inferred from the claim text.