Patent ID: 7053708
Filing Date: 2006-05-30
Classification: H03F,H03G

Abstract:
1. An electronic component for high frequency power amplification, said electronic component comprising: a power amplification circuit which is coupled between an input terminal and an output terminal and which amplifies a modulated high frequency signal; an output power detection circuit which detects a magnitude of an output power of the power amplification circuit and outputting a signal for enabling feedback control of the output power of said power amplification circuit; and an impedance matching circuit coupled between an output of the power amplification circuit and the output terminal, wherein said impedance matching circuit comprises: a microstrip line comprised of a conductor layer having one end connected to an output terminal of a final-stage amplifier element of said power amplification circuit, and first and second capacitor elements connected between respective portions of the microstrip line and power source potential points, and wherein a monitor voltage extraction point is provided between the portion connected to said first capacitor element and the portion connected to said second capacitor element, of said microstrip line; and wherein said output power detection circuit receives a monitor voltage from the impedance matching circuit via a capacitor element coupled between the impedance matching circuit and the output power detection circuit so that the output power detection circuit detects the output power of the power amplification circuit.