Patent ID: 8878738

Claim:
A tunable antenna integrated system, comprising: a tunable antenna module, comprising: a tunable capacitor, for receiving an adjusting voltage and therefore adjusting a capacitance of the tunable capacitor according to the adjusting voltage; and an antenna, electrically coupled to the tunable capacitor, with a resonant frequency of the antenna being controlled by the capacitance of the tunable capacitor; a bias module, having a digital/analog converter, electrically coupled to the tunable capacitor, wherein the digital/analog converter is adapted to receive a control voltage to generate the adjusting voltage according to the control voltage, and the adjusting voltage is larger than the control voltage; a direct current control module, electrically coupled to the bias module, for outputting the control voltage to the digital/analog converter of the bias module; and a radio frequency module, electrically coupled to the bias module, wherein a radio frequency signal is transmitted between the tunable antenna module and the radio frequency module through the bias module.