Patent ID: 7269144

Claim:
A radio for transmitting and receiving, via an antenna, a plurality of high-frequency signals in a time-division-duplex mode on a single IC chip, the radio comprising: a circuit path adapted to connect the antenna to a data output port and to a data input port, wherein the circuit path comprises: (1) a down-conversion section for down-converting received high-frequency signals of the plurality of high-frequency signals; (2) a bandpass filter for filtering signals derived from the received high-frequency signals; (3) a detector for detecting a received data signal from a received filtered signal, wherein the received data signal is sent to the data output port; and (4) an up conversion section for up converting an information signal received from the data input port to a high-frequency signal of the plurality of high-frequency signals; wherein the up conversion section comprises a variable controlled oscillator; wherein the down-conversion section comprises the variable controlled oscillator; and wherein the circuit path comprising the bandpass filter, the detector, the up conversion section, and the down-conversion section is integrated into the single IC chip; and wherein bandpass filtering operations are performed by components integrated into the single IC chip.