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:
Jan. 24, 2017
Filed:
Aug. 28, 2014
Murata Manufacturing Co., Ltd., Kyoto, JP;
Kazutaka Mukaiyama, Kyoto, JP;
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
To achieve favorable directivity in a directional coupler, even with a low magnetic-field coupling coefficient, the directional coupler includes a main line, a secondary line, and impedance conversion sections. The main line is connected between a signal input port and a signal output port. The secondary line is coupled to the main line through coupling capacitance and mutual inductance. The impedance conversion sections are connected between the secondary line and a coupling port or an isolation port, and the impedance viewed from the secondary line differs from the impedance viewed from a port side while both impedances viewed from the secondary line are equal.