Patent ID: 9667217
Date: 2017-05-30
CPC Classifications: H01F,H03H

Claim:
1. A tunable impedance matching network including: (a) a multi-port spiral coupled merged inductor fabricated as a single integrated circuit structure having an input port and at least two output ports and configured such that the multi-port spiral coupled merged inductor functions as at least two inductors (1) connected at an intermediate junction defining an associated output port, and (2) having a mutual inductance value created by a mutual constructive interaction of the at least two inductors; (b) a first tunable capacitor electrically connected in a shunt configuration from the junction between at least two output ports of the multi-port spiral coupled merged inductor to circuit ground, the first tunable capacitor having an associated parasitic inductance value; and (c) a second tunable capacitor electrically connected in a shunt configuration from a second one of the at least two output ports of the multi-port spiral coupled merged inductor to circuit ground; wherein the multi-port spiral coupled merged inductor and the first tunable capacitor are configured such that the mutual inductance value of the multi-port spiral coupled merged inductor at least partially cancels out the parasitic inductance value associated with the first tunable capacitor.