Patent ID: 7460055

Claim:
A radar apparatus which transmits a spectrum-spread radar wave, receives a reflected wave obtained through reflection of the radar wave off an object, and detects the object from the reflected wave, said radar apparatus comprising: a pseudo-noise code generator which generates a pseudo-noise code; a delay device which delays the pseudo-noise code generated by said pseudo-noise code generator; an oscillator which generates a high-frequency signal; a transmission multiplier, made up of a differential circuit for inputting and outputting a differential signal, to which a high-frequency signal divided for transmission from the high-frequency signal generated by said oscillator is inputted as a transmission differential signal which is the differential signal, and which multiplies a frequency of the transmission differential signal by a predetermined multiplication ratio, the differential signal being made up of a positive-side signal and a negative-side signal; a reception multiplier, made up of the differential circuit, to which a high-frequency signal divided for reception from the high-frequency signal generated by said oscillator is inputted as a reception differential signal which is the differential signal, and which multiplies a frequency of the reception differential signal by the same multiplication ratio as with said transmission multiplier; a transmitter which generates the radar wave by using the differential signal obtained through the multiplication by said transmission multiplier and the pseudo-noise code generated by said pseudo-noise code generator; and a receiver which generates, from the reflected wave, a first demodulated signal and a second demodulated signal by using the differential signal obtained through the multiplication by said reception multiplier and the pseudo-noise code delayed by said delay device, the second demodulated signal having a phase that is orthogonal to the first demodulated signal.