Directional coupler

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 8803633
APP PUB NO 20130241668A1
SERIAL NO

13891075

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Abstract

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In a directional coupler, even when parasitic inductance exists, an increase in device size can be suppressed while obtaining good isolation characteristics. A transmission line type directional coupler includes a main line and a sub line that is coupled to the main line through electric field coupling and magnetic field coupling. The main line includes a signal input port and a signal output port, and the sub line includes a coupling port and an isolation port. A series capacitor is connected to only one of the signal output port and the coupling port.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
MURATA MANUFACTURING CO., LTD.KYOTO-FU5805

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Mukaiyama, Kazutaka Kyoto, JP 12 56
Tokuda, Daisuke Kyoto, JP 4 1

Cited Art Landscape

Patent Info (Count) # Cites Year
 
ATR OPTICAL AND RADIO COMMUNICATIONS RESEARCH LABORATORIES (1)
5446425 Floating potential conductor coupled quarter-wavelength coupled line type directional coupler comprising cut portion formed in ground plane conductor 18 1994
 
Ultrasource, Inc. (1)
7327582 Integrated thin film capacitor/inductor/interconnect system and method 6 2005
 
MITSUBISHI ELECTRIC CORPORATION (1)
2010/0171,564 DIRECTIONAL COUPLER 5 2009
 
TDK CORPORATION (1)
* 2010/0194,489 Directional coupler including impedance matching and impedance transforming attenuator 15 2009
 
MURATA MANUFACTURING CO., LTD. (1)
8421553 Directional coupler 3 2012
 
HONEYWELL INC. (1)
4795989 MMW microstrip coupler having movable test probe 9 1988
 
STMICROELECTRONICS (TOURS) SAS (1)
* 2010/0001,810 INTEGRATED DIRECTIONAL COUPLER 3 2009
* Cited By Examiner

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