Patent ID: 9647630
Date: 2017-05-09
CPC Classifications: H01Q,H03H

Claim:
1. An antenna impedance matching apparatus, comprising: a semiconductor chip, comprising multiple adjustable capacitors and multiple switches, wherein each adjustable capacitor of the multiple adjustable capacitors is arranged in parallel with an individual switch of the multiple switches thereby forming multiple capacitor-switch pairs; and at least one impedance component, located outside the semiconductor chip, wherein the semiconductor chip is coupled to the at least one impedance component through multiple terminals and coupled to an input terminal and an output terminal of the antenna impedance matching apparatus; the input terminal and the output terminal of the antenna impedance matching apparatus are respectively coupled to a radio frequency circuit and an antenna; wherein the multiple switches are configured to, under control of a control signal, switch a connection between the multiple adjustable capacitors and the at least one impedance component; and wherein capacitance values of the multiple adjustable capacitors are adjusted by an adjustment signal, so as to tune impedance matching of the antenna, wherein the multiple adjustable capacitors comprise a first adjustable capacitor and a second adjustable capacitor, and the multiple switches comprise a first switch and a second switch, wherein a first terminal and a second terminal of the first adjustable capacitor are respectively connected to a first terminal and a second terminal of the semiconductor chip, a first terminal and a second terminal of the second adjustable capacitor are respectively connected to a fourth terminal and a fifth terminal of the semiconductor chip, a first terminal and a second terminal of the first switch are respectively connected to the first terminal and a third terminal of the semiconductor chip, and a first terminal and a second terminal of the second switch are respectively connected to the fourth terminal and a sixth terminal of the semiconductor chip.