RADIO FREQUENCY MATCHING CIRCUIT AND WIRELESS COMMUNICATION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a radio frequency matching circuit used for a multifrequency antenna, and a wireless communication device.SOLUTION: A radio frequency matching circuit 10 is electrically connected between an antenna 20 and an RF module 30. The radio frequency matching circuit comprises a first admittance circuit 11 and a second admittance circuit 12. The first admittance circuit 11 is connected in series between the antenna and the RF module and by adjusting an admittance of the first admittance circuit, resonant frequencies of low frequencies of the antenna at different frequency bands are changed. One end of the second admittance circuit is electrically connected between the RF module and the first admittance circuit and by grounding the other end of the second admittance circuit, influences of the first admittance circuit upon high frequency signals are canceled.