Patent ID: 7570915

Claim:
An antenna unit for a receiving system to listen to a satellite radio broadcast, said antenna unit comprising: an antenna portion for receiving a satellite wave or a terrestrial wave to produce a received signal; a circuit board disposed in parallel to said antenna portion which is apart from an upper surface of the circuit board at a predetermined interval; a tuner portion disposed on a rear surface of said circuit board for demodulating the received signal to produce a speech signal; a digital demodulating portion disposed on the rear surface of said circuit board for converting the speech signal into a digital speech signal; an interface portion disposed on the rear surface of said circuit board for converting the digital speech signal into an output signal for sending the digital speech signal to an external device via a serial bus, wherein said interface portion comprises a speech/serial converting portion for converting the digital speech signal into a serial signal, and said interface portion produces the serial signal as the output signal; and a case for accommodating said antenna portion, said circuit board, said tuner portion, said digital demodulating portion, and said interface portion therein.