Patent ID: 8811911

Claim:
A radio-frequency (RF) processing device, for a wireless communication device having a baseband module for generating a band switching signal according to a frequency band used by the wireless communication device, comprising: an antenna; an RF-signal processing module configured to be connected to the baseband module for outputting a baseband or mid-band signal to the baseband module; a controller configured to be connected to the baseband module, for generating a control signal according to the band switching signal generated by the baseband module; and a matching adjustment module connected to the controller for receiving the control signal from the controller and adjusting an impedance between the antenna and the RF-signal processing module according to the control signal; wherein the matching adjustment module comprises: a converter, for converting the control signal provided by the controller into a plurality of voltage signals; and a matching adjustment circuit comprising a plurality of inductors, coupled between the antenna and the RF-signal processing module in series and a plurality of varactors, coupled between the plurality of inductors and a ground, for changing capacitance between the antenna and the RF-signal processing module according to the plurality of voltage signals to vary voltage standing wave ratios and extend an operating bandwidth of the antenna without extending the antenna.