MATCHING CIRCUIT AND WIRELESS COMMUNICATION DEVICE USING THE SAME

摘要

A matching circuit electronically connected between an antenna and a radio frequency (RF) module includes a first admittance circuit and a second admittance circuit. The first admittance circuit is electronically connected between the antenna and the RF module. The first admittance circuit is configured to adjust resonance frequencies of the antenna at multiple frequency bands by changing an admittance of the first admittance circuit. A first end of the second admittance circuit is electronically connected between the RF module and the first admittance circuit. A second end of the second admittance circuit is grounded. The second admittance circuit is configured to reduce the first admittance circuit from influence of high frequency signals.

主权项

1. A matching circuit electronically connected between an antenna and a radio frequency (RF) module, the matching circuit comprising:
a first admittance circuit electronically connected in series between the antenna and the RF module, the first admittance circuit configured to adjust resonance frequencies of the antenna at multiple frequency bands by changing an admittance of the first admittance circuit; and a second admittance circuit; wherein a first end of the second admittance circuit is electronically connected between the RF module and the first admittance circuit, and a second end of the second admittance circuit is grounded; the second admittance circuit is configured to reduce the first admittance circuit from influence of to high frequency signals.