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Patent Searching and Data


Title:
DIRECTIONAL COUPLER CIRCUIT TECHNIQUES
Document Type and Number:
WIPO Patent Application WO/2015/020927
Kind Code:
A3
Abstract:
Techniques for efficiently integrating directional coupler circuitry with other circuit elements of an RF front end. In an aspect, one or more inductors of an RF front end filter is incorporated into a first inductor (L1) of the directional coupler (305), and a capacitor (Ca) is further coupled in parallel with the first inductor (L1). In another aspect, circuitry associated with matching components (299a, 299b) of the RF front end may further be incorporated into the directional coupler design. Further techniques are provided for coupling directivity tuning elements to a second inductor of the directional coupler to improve the linearity of the coupler over other tuning techniques.

Inventors:
IMBORNONE, James Francis (5775 Morehouse Drive, San Diego, California, 92121, US)
SUN, Yanjie (5775 Morehouse Drive, San Diego, California, 92121, US)
LUO, Zhenying (5775 Morehouse Drive, San Diego, California, 92121, US)
CHEN, Zhenqi (5775 Morehouse Drive, San Diego, California, 92121, US)
PRESTI, Calogero D. (5775 Morehouse Drive, San Diego, California, 92121, US)
WANG, Xinwei (5775 Morehouse Drive, San Diego, California, 92121, US)
ZHANG, Xiangdong (5775 Morehouse Drive, San Diego, California, 92121, US)
Application Number:
US2014/049531
Publication Date:
June 18, 2015
Filing Date:
August 04, 2014
Export Citation:
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Assignee:
QUALCOMM INCORPORATED (Attn: International IP Administration, 5775 Morehouse DriveSan Diego, California, 92121-1714, US)
International Classes:
H03H7/48; H01P5/18
Foreign References:
US5796316A1998-08-18
US20060232359A12006-10-19
US5448771A1995-09-05
US3426298A1969-02-04
Other References:
NITIN JAIN ET AL: "Methods of Using Commercial Electromagnetic Simulators for Microwave and Millimeter-Wave Circuit Design and Optimization", IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, IEEE SERVICE CENTER, PISCATAWAY, NJ, US, vol. 45, no. 5, 1 May 1997 (1997-05-01), XP011036810, ISSN: 0018-9480
Attorney, Agent or Firm:
TEMPEL, Michael J. et al. (Smith Risley Tempel Santos LLC, Two Ravinia Drive Suite 70, Atlanta Georgia, 30346, US)
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