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Fumitake Kawanabe, Yoichi Okubo, Yasuo Sera, Manabu Nakamura, Toshio Nojima, Taizo Ito: High frequency power amplifier. Hitachi Kokusai Electric, Bacon & Thomas Pllc, August 13, 2009: US20090201089-A1

A high frequency power amplifier includes an amplifying device for amplifying an input high frequency signal, a harmonic reflection circuit for reflecting a harmonic outputted from the amplifying device, and a harmonic generating circuit provided at an input terminal of the amplifying device, the ha ...


62
Yoichi OKUBO, Manabu NAKAMURA, Yasuhiro TAKEDA, Taizo ITO, Junya DOSAKA, Terufumi NAGANO, Hidekatsu UENO, Toshio NOJIMA: Amplifier apparatus. Hitachi Kokusai Electric, Brundidge & Stanger PC, May 13, 2010: US20100117726-A1

An amplifier capable of lowering an electrical current flowing in a peak amplifier before a carrier amplifier becomes saturated to thereby improve the efficiency of an entirety of the amplifier is provided. The amplifier includes a carrier amplifier circuit having an amplifying element operable in c ...