Patent ID: 8606200
Filing Date: 2013-12-10
Classification: H03F,H04B

Abstract:
1. A method for adjusting transmitted radio frequency (RF) signal output power in a portable radio transceiver, comprising: sensing a transmitter power supply output voltage; comparing the transmitter power supply output voltage to a predetermined threshold voltage; sensing a transmitter RF loading only when the transmitter power supply output voltage is less than the predetermined threshold voltage, wherein the sensing of the transmitter RF loading includes sensing of a first voltage standing wave ratio (VSWR) difference in phases of a sampled transmitted RF signal output power in a forward direction and a reverse direction, and sensing of a second VSWR difference in magnitudes of the sampled transmitted RF signal output power in the forward direction and the reverse direction; and adjusting the transmitted RF signal output power in response to a change in a combination of the first VSWR difference and the second VSWR difference of the transmitter RF loading.