US Patent 7253776 FM radio receiver

An object of the invention is to provide an FM radio receiver capable of improving the receiving state. The radio receiver 10 is disposed within a vehicle room and provided with a vehicle-mounted antenna connection terminal 12. The radio receiver 10 includes a front-end unit converting to an intermediate frequency signal an FM broadcast signal received via a vehicle-mounted antenna 110, a signal line inserted between the vehicle-mounted antenna connection terminal 12 and the front-end unit, and an in-vehicle antenna 14 branching out from the signal line. A radio wave transmitted from an FM transmitter 40 disposed within the vehicle room via an antenna 42 is received by the radio receiver 10 via the in-vehicle antenna 14.