ON-VEHICLE RADIO DEVICE

摘要

To provide an on-vehicle radio device that acquires identification information for unlocking a lock device of a vehicle from a portable radio device having the identification information recorded therein by radio communication with the portable radio device and is configured so that the radio communication can be achieved with higher reliability. An on-vehicle radio device that acquires identification information for unlocking a lock device of a vehicle from a portable radio device having the identification information recorded therein by radio communication with the portable radio device, includes: variable frequency signal generating means P0, 21, 22; band changing means that changes a frequency band; radio transmitting means 18, 20 that transmits the signal generated by the variable frequency signal generating means to the outer space; and transmission characteristics changing means 25 that changes the transmission characteristics of the radio transmitting means to transmission characteristics adapted to the changed frequency band.