Patent ID: 8219145

Claim:
A multi-band wireless system, comprising: a wireless device comprising: an application processor configured to output a data signal; an antenna configured to transmit a wireless signal comprising a first amplified radio-frequency (RF) signal; a first electric interface in communication with the application processor; a second electric interface in communication with the antenna; and a detachable radio card configured to be mounted in contact with the first and second electric interfaces, the detachable radio card comprising: a base band processor configured to receive the data signal via the first electric interface from the application processor and to output a modulated signal; a radio-frequency (RF) transceiver configured to receive the modulated signal and output a first RF signal in a first frequency band or a second frequency band; a multi-band power amplifier module configured to amplify the first RF signal to produce the first amplified RF signal in the first frequency band or the second frequency band and to send the first amplified RF signal via the second electric interface to the antenna for wireless transmission via the antenna; and a radio controller configured to control the RF transceiver and the multi-band power amplifier module to select the first frequency band or the second frequency band, wherein the radio controller is configured to send a linearity control signal to the multi-band power amplifier module to control linearity of the first amplified RF signal.