Mobile wireless communications device with impedance matching and related methods

摘要

A mobile wireless communications device may include a processor configured to generate a baseband signal, a modulator coupled downstream from the processor, a power amplifier coupled downstream from the modulator, an antenna, and a tunable antenna matching network coupled between the power amplifier and the antenna and configured to match an impedance of the antenna and thereby causing a phase change in an output from the antenna. The processor may be configured to provide upstream phase change compensation in the baseband signal for the phase change in the output from the antenna.

主权项

1. A mobile wireless communications device comprising:
a baseband processor configured to generate a baseband signal; a modulator coupled downstream from the baseband processor; a power amplifier coupled downstream from the modulator; an antenna; a tunable antenna matching network coupled between the power amplifier and the antenna and configured to match an impedance of the antenna and thereby cause a phase change in a transmitted signal output from the antenna; and a feedback path between the tunable antenna matching network and the baseband processor; the baseband processor configured to:
receive the phase change in the transmitted signal output due to the tunable antenna matching network via the feedback path, andprovide upstream phase change compensation to the baseband signal for the phase change in the transmitted signal output from the antenna,wherein the baseband processor is configured to provide the upstream phase change compensation to the baseband signal within about one microsecond of the phase change in the transmitted signal output from the antenna.