Tunable Dual-band Microwave Photonic Filters Covering 37.2 GHz to 186.1 GHz Utilizing Chirped Sampled Gratings

We present a microwave photonic filter featuring dual independently tunable passbands. Constructed with linearly chirped sampled Bragg gratings incorporating two equivalent phase shifts, supplemented by microheaters, this filter exhibits a tunable frequency range spanning from 37.2 GHz to 186.1 GHz.