Patent ID: 8000737
Filing Date: 2011-08-16
Classification: H01Q,Y10T

Abstract:
1. A communications apparatus comprising: a first antenna; a first serial configuration of a first power amplifier and a first matching network; a second serial configuration of a second power amplifier and a second matching network; a switching element for switchably selecting the first or the second serial configuration for supplying a signal to the first antenna; the first and the second power amplifiers supplying a respective first signal of a first power and a second signal of a second power different than the first power to the first antenna for transmitting; the first and the second matching networks presenting respective first and second impedances to the respective first and second power amplifiers, the first and the second impedances responsive respectively to a power-related parameter of the first and the second signals; a second antenna; a third serial configuration of a third power amplifier and a third matching network; a fourth serial configuration of a fourth power amplifier and a fourth matching network; a second switching element for switchably selecting the third or the fourth serial configuration to supply a signal to the second antenna; the third and the fourth power amplifiers supplying a respective third signal of a third power and a fourth signal of a fourth power different than the third power to the second antenna for transmitting; the third and the fourth matching networks presenting a respective third and fourth impedance to the third and the fourth power amplifiers, the third and the fourth impedances responsive respectively to the third power and the fourth power; and the first antenna operating in a first frequency band and the second antenna operating in a second frequency band different than the first frequency band.