Wave transmission lines and networks – Plural channel systems – Having branched circuits
Patent
1982-06-04
1985-03-12
Gensler, Paul
Wave transmission lines and networks
Plural channel systems
Having branched circuits
333135, 333 21A, H01P 1161, H01P 512
Patent
active
045048053
ABSTRACT:
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 side-arm waveguide means associated therewith for propagating signals in one of the different frequency bands; filtering means disposed within the main waveguide and operatively associated with the first and second junctions, the filtering means 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 means associated therewith, and (2) a passband characteristic for passing signals in a second one of the frequency bands past the first junction, the filtering means and the first junction suppressing spurious excitation of signals in undesired propagation modes different from the selected mode; and means for coupling signals in the second frequency band between the main waveguide and the second junction.
REFERENCES:
patent: 2908872 (1959-10-01), Garoff
patent: 3731235 (1973-05-01), Ditullio et al.
patent: 3978434 (1976-08-01), Morz et al.
patent: 4076039 (1978-02-01), Ren et al.
patent: 4258366 (1981-03-01), Green
patent: 4410866 (1983-10-01), Bui-Hai
Article Entitled "Frequency Reuse Feed for Domsat Ground Stations" by G. W. Collins.
Brochures entitled "Test Protocol for Linearly Polarized OMT with Mechanical Polarized Adjustment".
Ekelman, Jr. Ernest P.
Ostertag Edward L.
Andrew Corporation
Gensler Paul
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