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:
Feb. 03, 2015
Filed:
May. 22, 2012
Takashi Uno, Hyogo, JP;
Hikaru Ikeda, Osaka, JP;
Kazuhiro Yahata, Osaka, JP;
Motoyoshi Iwata, Osaka, JP;
Hiroshi Naitou, Osaka, JP;
Tomohide Kamiyama, Osaka, JP;
Takashi Uno, Hyogo, JP;
Hikaru Ikeda, Osaka, JP;
Kazuhiro Yahata, Osaka, JP;
Motoyoshi Iwata, Osaka, JP;
Hiroshi Naitou, Osaka, JP;
Tomohide Kamiyama, Osaka, JP;
Abstract
A radio frequency power amplifier includes: an amplifying element which amplifies an input signal and outputs the signal from an output terminal; and an output load circuit which includes a first resonant circuit and a second resonant circuit that are connected to the output terminal. The first resonant circuit has a resonance frequency higher than the frequency of the second harmonic of the input signal, and the second resonant circuit has a resonance frequency lower than the frequency of the third harmonic of the input signal. The output load circuit has such an impedance looking from the output terminal that a phase of a reflection coefficient at the second harmonic of the input signal is greater than 180 degrees and less than 360 degrees, and a phase of a reflection coefficient at the third harmonic of the input signal is greater than 0 degrees and less than 180 degrees.