Patent ID: 7671693

Claim:
A system for impedance matching in a wireless device, comprising: signaling circuitry coupled to an antenna and configured to receive a signal at a first frequency and transmit a signal at a second frequency; impedance matching circuitry coupled to the signaling circuitry and having a plurality of tunable elements for matching an impedance of the first and second frequencies with an impedance of the antenna; a memory containing a plurality of values associated with the tunable elements, wherein each value corresponds to a state of the signaling circuitry and is defined to configure the associated tunable element for impedance matching at both the first and second frequencies when the signaling circuitry is in the corresponding state; and a controller configured to obtain a current state of the signaling circuitry and a current state of a physical property of the wireless device, select the values from the memory that correspond to the current states of the signaling circuitry and the physical property of the wireless device, and apply the selected values to their associated tunable elements, wherein the current state of the signaling circuitry comprises a transmit return loss magnitude and phase.