Studies on the performance of a Gunn oscillator based demodulator system in presence of chaos modulated signal

Abstract

We have studied experimentally and numerically the performance of a Gunn oscillator (GO) based demodulator system in the presence of chaos modulated signal. A free running GO is used as an FM modulator employing bias tuning technique. At the demodulator side, a phase discriminator circuit is used to recover the transmitted chaotic signal. The obtained results confirm that the chaotic modulating signal can be detected by keeping the frequency of the GO at the demodulator section at any value within the lock-in bandwidth of the GO.