Patent ID: 8351882

Claim:
A mobile wireless communication device comprising: a signal modifier in said mobile wireless communication device to receive an input signal and produce a first transmit signal differing by a phase difference from a second transmit signal; and a transmit amplifier stage in said mobile wireless communication device operable to amplify said first and second transmit signals, comprising: a first channel comprising at least one full power amplifier operable to provide power to amplify the first transmit signal for transmission by a first antenna at a full power, wherein a substantially maximum efficiency of the first power amplifier substantially coincides with the a specification power limit of the wireless device; and a second channel comprising at least one fractional power amplifier operable to amplify the second transmit signal for transmission by a second antenna at a fractional power, wherein a substantially maximum efficiency of the fractional power amplifier substantially coincides with the fractional power, the fractional power being a fraction of the specification power limit of the wireless device, wherein said signal modifier is further to produce said phase difference based on a feedback signal received from a receiver of said first and second transmit signals.