Patent ID: 9735743
Date: 2017-08-15
CPC Classifications: H03F,H04B,H04W

Claim:
1. An apparatus comprising: a power amplifier; at least one variable impedance device electrically coupled to an output of the power amplifier; and at least one antenna electrically coupled to an output of the at least one variable impedance device, wherein optimized impedance characteristics of the at least one variable impedance device is varied based on variation of a supply voltage to the power amplifier and variation of impedance characteristics of the at least one antenna, wherein the variation of impedance characteristics of the at least one antenna cause a change in coefficients of a mapping function, and wherein an output of the mapping function comprises at least one control signal that controls the optimized impedance characteristics of the at least one variable impedance device as a function of the variation of the supply voltage to the power amplifier.