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Class Information
Number: 333/135
Name: Wave transmission lines and networks > Plural channel systems > Having branched circuits > For providing frequency separation > Utilizing long line element > Including waveguide element
Description: Subject matter wherein the long line element is of the type having a magnetic or electrical component extending in the direction of propagation.










Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
4912436 Four port dual polarization frequency diplexer Mar. 27, 1990
4903037 Dual frequency microwave feed assembly Feb. 20, 1990
4881051 Dielectric image-resonator multiplexer Nov. 14, 1989
4847574 Wide bandwidth multiband feed system with polarization diversity Jul. 11, 1989
4839894 Contiguous channel multiplexer/demultiplexer Jun. 13, 1989
4837531 Three-access polarization and frequency duplexing device Jun. 6, 1989
4833428 14/12 GHz Duplexer May. 23, 1989
4812789 Ridged waveguide wide band diplexer with extremely sharp cut-off properties Mar. 14, 1989
4783639 Wideband microwave diplexer including band pass and band stop resonators Nov. 8, 1988
4780693 Probe coupled waveguide multiplexer Oct. 25, 1988
4777459 Microwave multiplexer with multimode filter Oct. 11, 1988
4777457 Directional coupler for separation of signals in two frequency bands while preserving their polarization characteristics Oct. 11, 1988
4758806 Antenna exciter for at least two different frequency bands Jul. 19, 1988
4757281 Rotary microwave joint device Jul. 12, 1988
4725796 Millimeter and infra-red wavelength separating device Feb. 16, 1988
4725795 Corrugated ridge waveguide phase shifting structure Feb. 16, 1988
4630059 Four-port network coupling arrangement for microwave antennas employing monopulse tracking Dec. 16, 1986
4623921 Antenna diplexer utilizing aural input for visual service Nov. 18, 1986
4622524 Dual band polarization filter comprising orthogonally oriented fin-type conductors Nov. 11, 1986
4614920 Waveguide manifold coupled multiplexer with triple mode filters Sep. 30, 1986
4602229 Resonant bandpass T filter and power splitter Jul. 22, 1986
4567401 Wide-band distributed rf coupler Jan. 28, 1986
4546471 Multiplexing device for grouping two frequency bands Oct. 8, 1985
4527137 Evanescent resonator frequency multiplier Jul. 2, 1985
4520329 Circuit component for separating and/or combining two isofrequential but differently polarized pairs of signal waves lying in different high-frequency bands May. 28, 1985
4516089 System for receiving microwave signals having orthogonal polarizations May. 7, 1985
4507665 Primary source with frequency re-utilization Mar. 26, 1985
4504805 Multi-port combiner for multi-frequency microwave signals Mar. 12, 1985
4498062 Waveguide structure for separating microwaves with mutually orthogonal planes of polarization Feb. 5, 1985
4491810 Multi-port, multi-frequency microwave combiner with overmoded square waveguide section Jan. 1, 1985
4467294 Waveguide apparatus and method for dual polarized and dual frequency signals Aug. 21, 1984
4458217 Slot-coupled microwave diplexer and coupler therefor Jul. 3, 1984
4420756 Multi-mode tracking antenna feed system Dec. 13, 1983
4410866 Antenna transducer for a transmission-reception antenna Oct. 18, 1983
4367446 Mode couplers Jan. 4, 1983
4344048 Four-port network for separating two signals comprised of doubly polarized frequency bands Aug. 10, 1982
4319206 Transducer for orthogonally polarized signals of different frequencies Mar. 9, 1982
4231000 Antenna feed system for double polarization Oct. 28, 1980
4231001 Constant resistance coupling network Oct. 28, 1980
4228410 Microwave circular polarizer Oct. 14, 1980
4222017 Rotatable polarization duplexer Sep. 9, 1980
4176330 Diplexer apparatus Nov. 27, 1979
4168478 Apparatus for separating electrical signals of different frequencies Sep. 18, 1979
4162463 Diplexer apparatus Jul. 24, 1979
4145673 Multiplexer for millimetric waves Mar. 20, 1979
4110709 Apparatus for coupling microwave energy from two oscillators to a common transmission line Aug. 29, 1978
4052724 Branching filter Oct. 4, 1977
4030048 Multimode coupling system including a funnel-shaped multimode coupler Jun. 14, 1977
3978434 System separating filter for separating first and second doubly polarized frequency bands Aug. 31, 1976

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