Frequency modulation continuous radar signal transmitting and receiving device for use in motor vehicle, has high frequency-receiving amplifier switched-on and switched-off to generate square wave modulated with unmixed echo signal

摘要

The device has a transmitting antenna (TxA) for emitting a frequency modulation continuous radar signal, and a receiving antenna (RxA) for receiving an echo signal and the emitted continuous radar signal. A high frequency-receiving amplifier (AMP) amplifies the received echo signal, and a mixer (MXR) down mixes the received and amplified echo signal with the continuous radar signal generated by a frequency modulation high frequency-oscillator (HCO). The amplifier is periodically switched-on and switched off to generate a square wave modulated with an unmixed echo signal.