Multi-port combiner for multi-frequency microwave signals

Details Multi-port combiner for multi-frequency microwave signals Multi-port combiner for multi-frequency microwave signals

H - Electricity

01

P

333/3

H01P 1/213 (2006.01) H01P 1/209 (2006.01)

Patent

CA 1194562

Abstract of the Disclosure A combiner for transmitting and receiving co-polarized microwave signals in a selected propagation mode in at least two different frequency bands, the combiner comprising a main waveguide dimensioned to simultaneously propagate signals in the different frequency bands, at least a portion of the main waveguide being overmoded; at first and second junctions spaced along the length of the main waveguide for coupling signals in the different frequency bands in and out of the main waveguide, at least the first junction being located in an overmoded portion of the main waveguide and having a side-arm waveguide device associated therewith for propagating signals in one of the different frequency bands; a filtering device disposed within the main waveguide and operatively associated with the first and second junctions, the filtering device having (1) a stopband characteristic for coupling signals in a first one of the frequency bands between the main waveguide and the first junction and the side-arm waveguide device associated therewith, and (2) a passband characteristic for passing signals in a second one of the frequency bands past the first junction, the filtering device and the first junction suppressing spurious excitation of signals in undesired propagation modes different from the selected mode; and a device for coupling signals in the second frequency band between the main waveguide and the second junction.

424543

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