A fibered optoelectronic arbitrary waveform generator for radar applications is demonstrated. The proposed optoelectronic arbitrary radar waveform generator permits to generate predefined electrical waveforms according to radar specifications. Through the use of an optical frequency shifter, a beat signal at the central frequency of the radar is generated in a homodyne optical setup. An original Doppler module based on acousto-optic techniques permits to generate multiple arbitrary frequencies around the central frequency of the radar to simulate the Doppler signature of a target. In this paper, we demonstrate the ability to generate microwave arbitrary waveforms with a radar central frequency fro 12 GHz up to 14 GHz with up to 700 Doppler frequency components and more than 17 dB spurious extinction ratio.
We propose an optoelectronic arbitrary radar waveform generator. It permits to generate predefined electrical waveforms according to radar specifications by driving phase and amplitude distributions of optically carried microwave signals. The control of amplitudes and phases of each radar spectrum frequency component is optically achieved by spatial light modulators (SLM). We present and experimentally demonstrate two ways to achieve the kilohertz high resolution between the frequency components of a radar signal at 7.1 GHz central frequency.
An optoelectronic arbitrary-waveform generator has been proposed and experimentally developed for radar applications. It permits generating predefined waveforms by driving the amplitudes and phases of optically carried microwave signals. The optical architecture combines a high- resolution frequency shifter (for the heterodyne generation of the microwave signal) with spatial light modulators (for the parallel control of amplitudes and phases). Such a waveform generator can be attractive for target recognition or for target simulation.