Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Akira Inoue0
Ko Kanaya0
Seiki Gotou0
Shinsuke Watanabe0
Date of Patent
August 17, 2010
0Patent Application Number
121475420
Date Filed
June 27, 2008
0Patent Primary Examiner
Patent abstract
A high frequency power amplifier comprises: a multi-finger transistor with transistor cells electrically connected in parallel; an input side matching circuit connected to gate electrodes of the transistor cells; and resonant circuits respectively connected between the gate electrode of a transistor cell and the input side matching circuit. The resonant circuit resonates at a second harmonic of the operating frequency of the transistor or within a predetermined range of frequencies having a center at the second harmonic of the operating frequency, and becomes a high-impedance load at the second harmonic, or an open load.
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