The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 09, 2019
Filed:
Jan. 04, 2017
Applicant:
Murata Manufacturing Co., Ltd., Nagaokakyo-shi, Kyoto-fu, JP;
Inventors:
Kenichi Ishizuka, Nagaokakyo, JP;
Hiroshi Nishida, Nagaokakyo, JP;
Assignee:
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03H 7/18 (2006.01); H01F 27/40 (2006.01); H04B 1/40 (2015.01); H01F 27/28 (2006.01); H01F 27/42 (2006.01); H03H 7/38 (2006.01); H03H 7/09 (2006.01); H03H 7/19 (2006.01);
U.S. Cl.
CPC ...
H03H 7/18 (2013.01); H01F 27/2804 (2013.01); H01F 27/40 (2013.01); H01F 27/42 (2013.01); H03H 7/09 (2013.01); H03H 7/19 (2013.01); H03H 7/38 (2013.01); H04B 1/40 (2013.01); H01F 2027/2809 (2013.01);
Abstract
A transformer-type phase shifter or a phase-shift circuit includes a first coil and a second coil that is magnetically coupled to the first coil with a coupling coefficient of less than 1, a transformer including a parallel inductance component and a series inductance component, and an impedance adjustment circuit including a reactance element that performs impedance adjustment for the transformer, thus being advantageous in reducing the size, loss, and frequency dependency of the phase-shift amount.