Patent ID: 7714787

Claim:
A wireless module comprising: an antenna comprising: a transmission line; and a variable capacitance unit configured to control a resonant frequency of the antenna; a transmitting and/or receiving circuit, wherein said transmitting circuit and/or receiving circuit includes a circuit for producing an antenna control signal, wherein: a central processing unit external to said wireless module controls said transmitting circuit and/or receiving circuit to set the frequency of a radio signal transmitted/received from said transmitting circuit and/or receiving circuit through said antenna, said central processing unit controls said transmitting circuit and/or receiving circuit to produce said antenna control signal that controls the resonant frequency of said antenna for transmitting/receiving the radio signal through the antenna, and said frequency of said radio signal that said transmitting circuit and/or receiving circuit transmits/receives and said resonant frequency of said antenna for transmitting/receiving the radio signal through the antenna are controlled in conjunction with each other.