Patent ID: 8903333

Claim:
An antenna tuning system operable to provide matching simultaneously at a first transmission frequency and a first receive frequency, the antenna tuning system comprising: a first antenna tuner configured to provide a first pass band having a first resonant frequency and a second resonant frequency, the first antenna tuner comprising: a first low-pass pi network, the first low-pass pi network comprising: a first shunt connected segment configured to provide a first variable capacitance; a second shunt connected segment configured to provide a second variable capacitance; a first series connected segment coupled between the first shunt connected segment and the second shunt connected segment and configured to provide a first inductance; a first capacitive element configured to provide a third variable capacitance wherein the first capacitive element is coupled in series with the first low-pass pi network; and an antenna tuner control system operably associated with the first antenna tuner, the antenna tuner control system being operable to control the first variable capacitance, the second variable capacitance, and the third variable capacitance so as to degrade the first pass band of the antenna tuner between the first resonant frequency and the second resonant frequency to provide higher O-factors at the first resonant frequency and the second resonant frequency.