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Class Information
Number: 333/113
Name: Wave transmission lines and networks > Plural channel systems > Having branched circuits > Using directional coupler > Having parallel-guide waveguide
Description: Subject matter wherein the first and second transmission lines are waveguides; the direction of energy propagation in the first and second lines being parallel in the coupling region.

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8664807 Planar tri-mode cavity Mar. 4, 2014
8594480 Rotating data transmission device Nov. 26, 2013
8482361 Waveguide power divider having coupling slots between stacked waveguide portions and method of manufacture Jul. 9, 2013
8324983 Selectable coupling level waveguide coupler Dec. 4, 2012
8294530 PCB mounted directional coupler assembly Oct. 23, 2012
8213534 Transmission apparatus and communication system Jul. 3, 2012
8171191 Bus interconnect device and a data processing apparatus including such a bus interconnect device May. 1, 2012
8040206 Circular and/or linear polarity format data receiving apparatus Oct. 18, 2011
8023902 Adaptive radio transceiver with an antenna matching circuit Sep. 20, 2011
7973616 Post-wall waveguide based short slot directional coupler, butler matrix using the same and automotive radar antenna Jul. 5, 2011
7863997 Compact tuner for high power microwave source Jan. 4, 2011
7804381 Broadcast signal waveguide Sep. 28, 2010
7755450 Waveguide correlation unit and a method for its manufacturing Jul. 13, 2010
7697900 Adaptive radio transceiver with an antenna matching circuit Apr. 13, 2010
7671700 Hollow waveguide directional coupler Mar. 2, 2010
7561013 Small NRD guide bend Jul. 14, 2009
7382215 Image guide coupler switch Jun. 3, 2008
7349673 Adaptive radio transceiver with an antenna matching circuit Mar. 25, 2008
7307492 Design, layout and method of manufacture for a circuit that taps a differential signal Dec. 11, 2007
7286093 Frequency dispersive antenna applied in particular to a meteorological radar Oct. 23, 2007
7116945 Adaptive radio transceiver with an antenna matching circuit Oct. 3, 2006
7109823 Image guide coupler switch Sep. 19, 2006
7068118 Pulse modulator for nonradiative dielectric waveguide, and millimeter wave transmitter/receiver using the same Jun. 27, 2006
6956447 Directional coupler using non-radiative dielectric waveguide Oct. 18, 2005
6927653 Dielectric waveguide type filter and branching filter Aug. 9, 2005
6917789 Adaptive radio transceiver with an antenna matching circuit Jul. 12, 2005
6897739 Waveguide power divider and combiner utilizing a resistive slot May. 24, 2005
6868258 Structure for connecting non-radiative dielectric waveguide and metal waveguide, millimeter wave transmitting/receiving module and millimeter wave transmitter/receiver Mar. 15, 2005
6737934 Directional Coupler, antenna device, and transmitting-receiving device May. 18, 2004
6707349 Directional coupler for microwave cavities Mar. 16, 2004
6668106 Crosspoint microwave switching architecture for optical telecommunications Dec. 23, 2003
6542046 Directional coupler, antenna device, and radar system Apr. 1, 2003
6483396 Microwave system with redundant processing devices and passive switching Nov. 19, 2002
6441699 Directional coupler, antenna device, and transmitting-receiving device Aug. 27, 2002
6400235 Radio frequency, millimeter-wave or microwave device and method of making same Jun. 4, 2002
6285266 Directional coupler having shiftable parallel dielectric transmission lines Sep. 4, 2001
6166699 Antenna source for transmitting and receiving microwaves Dec. 26, 2000
6147569 Non-radiative dielectric waveguide coupler Nov. 14, 2000
6144267 Non-Radiative dielectric line assembly Nov. 7, 2000
6127902 Waveguide directional coupler capable of propagating higher order modes Oct. 3, 2000
6121868 Electric switch device which can prevent damage to it and devices connected to it Sep. 19, 2000
6094106 Non-radiative dielectric waveguide module Jul. 25, 2000
6069529 Compact redundancy combiner assembly and method of operation thereof May. 30, 2000
5920245 Nonradiative dielectric line apparatus including a specifically oriented circuit board Jul. 6, 1999
5917232 Dielectric-line integrated circuit Jun. 29, 1999
5874867 Waveguide hybrid junction Feb. 23, 1999
5784033 Plural frequency antenna feed Jul. 21, 1998
5770989 Nonradiative dielectric line apparatus and instrument for measuring characteristics of a circuit board Jun. 23, 1998
5736907 Multiple-frequency autotrack feed for wideband communication systems Apr. 7, 1998
5714965 Active reception antenna with coplanar feeder Feb. 3, 1998

1 2 3

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