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. 16, 2013
Filed:
Jan. 28, 2010
Atsushi Fukuda, Yokosuka, JP;
Hiroshi Okazaki, Zushi, JP;
Shoichi Narahashi, Yokohama, JP;
NTT DoCoMo, Inc., Tokyo, JP;
Abstract
A multiband matching circuit includes a first matching unit for converting an impedance in a signal path to Zin a first frequency band, and a second matching unit formed of a series matching section connected at one end in series with the first matching unit in the signal path, which is a transmission line whose characteristic impedance is equal to the matching impedance Zor a circuit equivalent to the transmission line at least in the first frequency band, and a parallel matching section connected at one end to the signal path at the other end of the series matching section and grounded at the other end. The parallel matching section is configured to open in impedance the connection point to the signal path in the first frequency band. The series matching section and the parallel matching section are designed to match an impedance in a second frequency band with Z