“…Microwave phase shifter is one of the most essential components in phased array beamforming, phase coding, microwave filters, phase noise measurement, linear frequency modulated signals generation, and interference cancellation [1]- [5]. Conventional electrical phase shifters suffer from limited phase-shifting range [6]- [8], limited frequency-operating range [6], [8], limited phase-tuning resolution [6]- [9], and frequency-dependent phase shifts [7], [8]. In recent years, photonics-assisted microwave phase shifters have been reported based on different techniques such as stimulated Brillouin scattering [10], polarization maintaining fiber Bragg grating [11], highly nonlinear fiber [12], parallel modulators [13], polarization-dependent modulator [14], [15], and Fourier-domain optical processor (FD-OP) [16], [17].…”