Fig. 1. (a) The diagram of the microwave photonics filter based on FIR principle; (b) Principle of the MPF

Fig. 2. The principle of spurious suppression. (a) Schematic diagram of the source of kf_r; (b) Schematic diagram of the source of f_sk ; (c) S21 response of the H(kω_r) without pre-dispersion; (d) The S21 response ofH(kω_r); (e) S21 response of the H(ω_sk) without pre-dispersion; (f) The S21 response ofH(ω_s2)

Fig. 3. The optical spectrum of OFC and the signals after waveshaper amplitude configuration. (a) Optical spectrum of the optical frequency comb; (b) The waveshaper outputs for positive taps; (c) The waveshaper outputs for negative taps

Fig. 4. The FSR and 3 dB bandwidth of a sinc shape filter

Fig. 5. Normalized S21 response. (a) Lowpass filters; (b) High-pass filters; (c) Bandpass filters; (d) Band-stop filters

Fig. 6. Normalized S21 responses of typical filter shapes. (a) Normalized S21 response of Gaussian filter; (b) Normalized S21 response of a notch filter

Fig. 7. Spectrum of the output signal, when a single RF signal of 11.03 GHz is directly into the filter. (a) Without the pre-dispersion; (b) With the dispersion of 405 ps/nm