| 摘要 |
A mobile device includes an adjustable impedance matching network coupled between a power amplifier and an antenna and has an adjustable impedance element. An impedance sensor is coupled between the power amplifier and adjustable impedance matching network. A processor is configured to a) calculate a corrected antenna load impedance based upon a sensed impedance at inputs of the impedance matching network and a current value of the adjustable impedance element, and b) determine a new value for the adjustable impedance element based upon the corrected antenna load impedance. The processor is also configured to c) set the adjustable impedance element to the new value, and d) sense a new impedance at the inputs and determine if the sensed new impedance is within a threshold value of the power amplifier impedance, and repeat steps a), b), and c) if the sensed new impedance is not within the threshold value. |
