Patent ID: 7068171

Claim:
A radio for transmitting and receiving, via an antenna, of 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 bandpass filter for filtering signals derived from received high-frequency signals of the plurality of high-frequency signals; (2) a discriminator for detecting a received data signal from a received filtered signal, wherein the received data signal is sent to the data output port; (3) 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; and (4) a shaping filter connected to an input of the up-conversion section; wherein the circuit path comprising the bandpass filter, the discriminator, the up-conversion section, and the shaping filter is integrated into the single IC chip; and wherein bandpass filtering operations are performed by components integrated into the single IC chip.