Simultaneous and diverse dual-band microwave signals generator based on RF domain dual-loop Fourier domain mode locking optoelectronic oscillator

We propose and demonstrate experimentally a simultaneous and diverse dual-band microwave signals generation technique based on RF domain dual-loop Fourier domain mode locking optoelectronic oscillator (FDML-OEO). Two rapidly-tunable bandpass microwave filters (TBF) are parallel in the RF feedback link, and used for mode selection. Adjusting the drive signal of two TBFs, the TBFs are reconfigured and dual-band and dual-format linearly chirped microwave waveforms (LCMWs) can be generated based on the FDML OEO. In addition, the central frequencies of two frequency bands are independently tunable, and the modulation formats of waveforms at two frequency bands can also be diverse, this approach has potential in generating agile broadband multi-format radar waveforms with low phase noise and excellent pulse-to-pulse coherence directly from an OEO. This RF domain dual-loop diode-tuned FDML-OEO can be applied to advanced multi-band radar and wireless communication systems.