IMPEDANCE MATCHING CIRCUIT AND TRANSMITTER

摘要

Disclosed are an impedance matching circuit and a transmitter, which can improve the performance of a power amplification circuit. The impedance matching circuit comprises an isolation filtering unit and an adjustable impedance unit, wherein one end of the isolation filtering unit and one end of the adjustable impedance unit are connected, the connection end after the connection is taken as an input of the impedance matching circuit, and is connected to a power amplification circuit; the other end of the isolation filtering unit is taken as an output of the impedance matching circuit, and is connected to a load; the other end of the adjustable impedance unit is connected to the ground; the isolation filtering unit is conducted at an operating frequency band of the power amplification circuit; and the adjustable impedance unit has infinite impedance at the operating frequency band of the power amplification circuit, and has a designated impedance at a harmonic frequency band.