Patent ID: 9680441
Date: 2017-06-13
CPC Classifications: H01Q,H03H

Claim:
1. An impedance matching circuit for connection to a first circuit block that requires impedance matching, the first circuit block configured to have one terminal connected to a signal line and another terminal connected to a ground, the impedance matching circuit comprising: a second circuit block having a first circuit and a second circuit connected in parallel, the first circuit including a first capacitor having a variable capacitance and a first inductor having a first fixed inductance connected in series, the second circuit including a second inductor having a second fixed inductance and a switch connected in series, wherein one terminal of the impedance matching circuit is to be connected to the signal line of the first circuit block, and another terminal of the impedance matching circuit is to be connected to the ground of the first circuit block, wherein the first and second circuits of the second circuit block do not contain any radiation electrodes, wherein the first circuit is to be connected to the signal line without passing through the switch in the second circuit, wherein no series matching circuit is provided between the first circuit and the second circuit, wherein the first fixed inductance L wherein the second fixed inductance L