Patent ID: 7529523
Filing Date: 2009-05-05
Classification: H01Q

Abstract:
1. A method of calibrating an output power of a mobile terminal comprising: a) providing a radio frequency (RF) input signal to an input of a power amplifier of the mobile terminal; b) for each of an upper-band frequency, a mid-band frequency, and a lower-band frequency of a desired frequency band, measuring an output power of the mobile terminal for each of a plurality of values of an adjustable power amplifier gain (PAG), wherein the plurality of values of the PAG for each of the upper-band frequency, the mid-band frequency, and the lower-band frequency comprises at least three values; c) for each of the upper-band frequency, the mid-band frequency, and the lower-band frequency of the desired frequency band, performing a curve fit for the plurality of values of the PAG and the corresponding plurality of measurements of the output power, thereby providing a plurality of coefficients defining a polynomial describing a PAG versus output power characteristic of the power amplifier; and d) determining values of the PAG corresponding to a plurality of desired output power levels and a plurality of frequencies within the desired frequency band based on the polynomials describing the PAG versus output power characteristic of the power amplifier for each of the upper-band, mid-band, and lower-band frequencies of the desired frequency band.