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. 10, 2017
Filed:
Oct. 29, 2015
Mitsubishi Electric Corporation, Tokyo, JP;
Takayuki Matsuzuka, Tokyo, JP;
Junichi Udomoto, Tokyo, JP;
Tetsuo Kunii, Tokyo, JP;
Hiromitsu Utsumi, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A power amplifier includes: an amplifier; an input matching circuit connected to an input of the amplifier; an output matching circuit connected to an output of the amplifier; and a low-frequency processing circuit connected to the input matching circuit or the output matching circuit, wherein the low-frequency processing circuit includes a first line having a first end connected to the input matching circuit or the output matching circuit, a first shot stub connected to a second end of the first line and including a second line and a first capacitor connected in series each other, and a second short stub connected to the second end of the first line in parallel with the first short stub and including a third line and a second capacitor which are connected in series each other, the first line has a length of λ/8, the second line has a length of λ/4, and the third line has a length of λ/8 with respect to a wavelength λ of a fundamental frequency.