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Class Information
Number: 333/116
Name: Wave transmission lines and networks > Plural channel systems > Having branched circuits > Using directional coupler > Having tem lines > Using stripline
Description: Subject matter wherein each of the first and second transmission lines have a planar center conductor and a planar ground plate.










Patents under this class:
1 2 3 4 5 6 7 8

Patent Number Title Of Patent Date Issued
4906954 Directional coupler device Mar. 6, 1990
4902990 Thick film microwave coupler Feb. 20, 1990
4882555 Plural plane waveguide coupler Nov. 21, 1989
4827270 Antenna device May. 2, 1989
4823097 Microwave directional coupler Apr. 18, 1989
4821007 Strip line circuit component and method of manufacture Apr. 11, 1989
4817189 Directional high frequency broadband transformer made by printed circuit technique Mar. 28, 1989
4809356 Three-way power splitter using directional couplers Feb. 28, 1989
4800345 Spiral hybrid coupler Jan. 24, 1989
4799032 Directional coupler Jan. 17, 1989
4795989 MMW microstrip coupler having movable test probe Jan. 3, 1989
4777458 Thin film power coupler Oct. 11, 1988
4764771 Antenna feed network employing over-coupled branch line couplers Aug. 16, 1988
4754241 3dB directional coupler Jun. 28, 1988
4742354 Radar transceiver employing circularly polarized waveforms May. 3, 1988
4737740 Discontinuous-taper directional coupler Apr. 12, 1988
4697160 Hybrid power combiner and amplitude controller Sep. 29, 1987
4697161 Directional couplers of the branchline type Sep. 29, 1987
4689584 Dielectric slab circulators Aug. 25, 1987
4677399 Wide band directional coupler for microstrip lines Jun. 30, 1987
4673958 Monolithic microwave diodes Jun. 16, 1987
4647878 Coaxial shielded directional microwave coupler Mar. 3, 1987
4636755 High-ratio, isolated microwave branch coupler with power divider, phase shifters, and quadrature hybrid Jan. 13, 1987
4636754 High performance interdigitated coupler with additional jumper wire Jan. 13, 1987
4607240 Directional coupler Aug. 19, 1986
4591812 Coplanar waveguide quadrature hybrid having symmetrical coupling conductors for eliminating spurious modes May. 27, 1986
4583061 Radio frequency power divider/combiner networks Apr. 15, 1986
4559489 Low-loss radio frequency multiple port variable power controller Dec. 17, 1985
4541120 Transmitter-receiver module Sep. 10, 1985
4536725 Stripline filter Aug. 20, 1985
4532484 Hybrid coupler having interlaced coupling conductors Jul. 30, 1985
4527136 Signal coupling apparatus Jul. 2, 1985
4525690 N-port coupler Jun. 25, 1985
4525689 N.times.m stripline switch Jun. 25, 1985
4517535 High speed high power step attenuator method and apparatus May. 14, 1985
4499441 Superconducting signal processing circuits Feb. 12, 1985
4492939 Planar, quadrature microwave coupler Jan. 8, 1985
4490721 Monolithic microwave integrated circuit with integral array antenna Dec. 25, 1984
4489271 Reflection coefficient measurements Dec. 18, 1984
4482873 Printed hybrid quadrature 3 dB signal coupler apparatus Nov. 13, 1984
4476447 Adjustable directional coupler and power detector utilizing same Oct. 9, 1984
4471329 Microwave circuit component for superhigh-frequency signals Sep. 11, 1984
4465985 Hardwire missile receiver coupler Aug. 14, 1984
4459568 Air-stripline overlay hybrid coupler Jul. 10, 1984
4433314 Millimeter wave suspended substrate multiplexer Feb. 21, 1984
4423392 Dual-mode stripline antenna feed performing multiple angularly separated beams in space Dec. 27, 1983
4419635 Slotline reverse-phased hybrid ring coupler Dec. 6, 1983
4415867 Hybrid coupled microstrip amplifier Nov. 15, 1983
4394630 Compensated directional coupler Jul. 19, 1983
4394629 Hybrid power divider/combiner circuit Jul. 19, 1983

1 2 3 4 5 6 7 8










 
 
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