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:
Sep. 14, 2021
Filed:
Aug. 27, 2019
Applicant:
Murata Manufacturing Co., Ltd., Kyoto, JP;
Inventors:
Assignee:
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01P 5/18 (2006.01); H03H 7/01 (2006.01); H03H 7/38 (2006.01); H03F 3/189 (2006.01); H01P 1/201 (2006.01); H04B 1/00 (2006.01);
U.S. Cl.
CPC ...
H01P 5/187 (2013.01); H01P 1/201 (2013.01); H03F 3/189 (2013.01); H03H 7/0115 (2013.01); H03H 7/38 (2013.01); H04B 1/006 (2013.01);
Abstract
A directional coupler includes a main line for transmitting a high frequency signal, a sub line electromagnetically coupled to the main line, a termination circuit for terminating one end portion of the sub line, and a variable filter that has an input terminal and an output terminal and the input terminal is connected to another end portion of the sub line. The variable filter is a filter unit circuit having one frequency band as a pass band or a stop band, and in the filter unit circuit, a variable passive element for shifting a frequency in the pass band or the stop band is disposed.