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:
Dec. 06, 2011
Filed:
Apr. 11, 2008
Kazuhisa Yamauchi, Tokyo, JP;
Masatoshi Nakayama, Tokyo, JP;
Yasuhiro Onaka, Tokyo, JP;
Tomokazu Hamada, Tokyo, JP;
Satoru Ishizaka, Tokyo, JP;
Kazuhisa Yamauchi, Tokyo, JP;
Masatoshi Nakayama, Tokyo, JP;
Yasuhiro Onaka, Tokyo, JP;
Tomokazu Hamada, Tokyo, JP;
Satoru Ishizaka, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A directional coupler capable of improving a directionality of a directional coupler body including four terminals. The directional coupler includes a directional coupler body including the four terminals of an input port, an output port, a coupling port, and an isolation port; and a combiner for combining powers of an output signal of the coupling port and an output signal of the isolation port of the directional coupler body; and a directionality improving circuit for amplifying or attenuating at least one of the output signal of the coupling port and the output signal of the isolation port before outputting the same, and the combiner combines powers of the output signals amplified or attenuated by the directionality improving circuit.