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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
6771141 Directional coupler Aug. 3, 2004
6765455 Multi-layered spiral couplers on a fluropolymer composite substrate Jul. 20, 2004
6759922 High directivity multi-band coupled-line coupler for RF power amplifier Jul. 6, 2004
6759923 Device for directing energy, and a method of making same Jul. 6, 2004
6756860 Dual band coupler Jun. 29, 2004
6753746 Printed circuit board having jumper lines and the method for making said printed circuit board Jun. 22, 2004
6747525 Directional coupler Jun. 8, 2004
6738611 Image rejection sub-harmonic frequency converter realized in microstrip, particularly adapted to be use in mobile communication equipments May. 18, 2004
6731244 High efficiency directional coupler May. 4, 2004
6727782 Multilayered LC composite component and method for manufacturing the same Apr. 27, 2004
6686812 Miniature directional coupler Feb. 3, 2004
6677832 Connector for differential-mode transmission line providing virtual ground Jan. 13, 2004
6670856 Tunable broadside coupled transmission lines for electromagnetic waves Dec. 30, 2003
6642809 Multi-layer chip directional coupler Nov. 4, 2003
6624722 Coplanar directional coupler for hybrid geometry Sep. 23, 2003
6614325 RF/IF signal distribution network utilizing broadside coupled stripline Sep. 2, 2003
6611181 Electromagnetic coupler circuit board having at least one angled conductive trace Aug. 26, 2003
6600386 Thin-film broadband coupler Jul. 29, 2003
6590472 Surface mounted broadside directional coupler Jul. 8, 2003
6573801 Electromagnetic coupler Jun. 3, 2003
6573806 Method for adjusting the coupling factor of a strip line directional coupler and a strip line directional coupler Jun. 3, 2003
6573807 High-power directional coupler and method for fabricating Jun. 3, 2003
6549089 Microstrip directional coupler loaded by a pair of inductive stubs Apr. 15, 2003
6515556 Coupling line with an uncoupled middle portion Feb. 4, 2003
6512423 Printed board, method for producing the same, and electronic device having the same Jan. 28, 2003
6496082 Matched broadband switch matrix with active diode isolation Dec. 17, 2002
6483397 Tandem six port 3:1 divider combiner Nov. 19, 2002
6483398 Directional coupler, high frequency circuit module and wireless communication system Nov. 19, 2002
6441699 Directional coupler, antenna device, and transmitting-receiving device Aug. 27, 2002
6437661 Directional coupler Aug. 20, 2002
6429757 Coupling arrangement for a stripline network Aug. 6, 2002
6414565 Variable attenuator and mobile communication apparatus Jul. 2, 2002
6392503 Half-sawtooth microstrip directional coupler May. 21, 2002
6388538 Microwave coupling element May. 14, 2002
6346863 Directional coupler Feb. 12, 2002
6342681 Surface mount coupler device Jan. 29, 2002
6335662 Ferroelectric-tunable microwave branching couplers Jan. 1, 2002
6323741 Microstrip coupler with a longitudinal recess Nov. 27, 2001
6300848 Power splitter and power combiner using N-branch-line-shaped directional couplers Oct. 9, 2001
6275689 Double-balanced mixer Aug. 14, 2001
6225874 Coupling structure as a signal switch May. 1, 2001
6208220 Multilayer microwave couplers using vertically-connected transmission line structures Mar. 27, 2001
6150898 Low-pass filter with directional coupler and cellular phone Nov. 21, 2000
6147570 Monolithic integrated interdigital coupler Nov. 14, 2000
6111476 Non-contact coupling system Aug. 29, 2000
6104240 Microwave circuit and method of manufacturing microwave circuit Aug. 15, 2000
6066995 Four-phase phase converter May. 23, 2000
6018279 Radio frequency coupler Jan. 25, 2000
6016087 Coupled microstrip lines Jan. 18, 2000
5986616 Antenna system for circularly polarized radio waves including antenna means and interface network Nov. 16, 1999

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