Patent ID: 7868700

Claim:
A method for reducing the current consumption and increasing the efficiency of a MIMO system, consisting of two or more RF power amplifiers (PAs) having circuitry for enhancing the DC power supplied to said PAs and that are required to provide a desired total output power level, comprising: a) Determining an individual output power level for each PA, being a portion of said total output power level; b) dynamically or statically tuning the load, connected to the output stage of each PA, to essentially match the output impedance of its output stage, such that its dynamic or static RF load line has a slope that corresponds to the impedance required to provide said portion; c) whenever a smaller output power is desired in response to reduction in the input signal to MIMO system, determining a reduced portion for each PA; and d) further tuning said load, such that the dynamic/static RF load line has a slope that causes each PA to essentially remain in saturation while providing said reduced portion.