Patent ID: 8315578

Claim:
A mobile wireless communications device, comprising: a housing; an antenna mounted within the housing; radio frequency (RF) circuitry carried within the housing and comprising a transceiver connected to said antenna through which RF communications signals are transmitted and received, and a processor operative with the RF circuitry, wherein said transceiver further comprises an In-phase and Quadrature (I/Q) modulation and power amplification circuit comprising an In-phase (I) circuit having an In-phase signal input and a first modulator mixer configured to produce a modulated In-phase signal and first power amplifier circuit connected to the first modulator mixer that receives the modulated In-phase signal and amplifies the modulated In-phase signal and a first controller connected to the first power amplifier circuit and configured to change the bias in the first amplifier circuit; a Quadrature (Q) circuit comprising a Quadrature signal input and a second modulator mixer configured to produce a modulated quadrature signal and a second power amplifier circuit connected to the second modulator mixer that receives the modulated Quadrature signal and amplifies the modulated Quadrature signal and a second controller connected to the second power amplifier circuit and configured to change the bias in the second amplifier circuit; a quadrature hybrid power combiner that receives the separately amplified In-phase and Quadrature signals and sums and outputs the signals as a combined I and Q signal for further processing within the RF circuitry such that the I and Q signal inputs are isolated from the combined I and Q signal to enhance antenna matching and transmit radiated power (TRP) and reduce harmonic emission from the respective first and second power amplifier circuits, and further comprising a low pass filter that receives the combined I and Q signal and configured to force down a specific harmonic resulting from loss due to the quadrature hybrid power combiner.