Journal: Micromachines
Article Title: Photonics-Based Multifunction System for Radar Signal Transmit-Receive Processing and Frequency Measurement
doi: 10.3390/mi15091080
Figure Lengend Snippet: Schematic diagram of the proposed multifunctional microwave photonic system. The optical spectrum of ( a ) the CS-DSB and ( b ) the RF signal to be test, ( c ) the electrical spectrum of the frequency-doubled LFM signal after PD2, ( d ) the optical spectrum of self-interference cancellation. LD: laser diode; MZM: Mach–Zehnder modulator; DPMZM: dual-parallel Mach–Zehnder modulator; AWG: any waveform generator; EA: electrical amplifier; EATT: electrical amplitude tunable attenuator; ETDL: electrical time delay line; OBPF: optical bandpass filter; LNA: low noise amplifier; PD: photodetector.
Article Snippet: The PD2 output electrical signal is divided into two branches with a 3 dB electrical coupler (Marki, PD-0440, Beijing, China).
Techniques: