Patent ID: 8923702

Claim:
A microwave photonics based signal receiving device, comprising: a signal generation module; a first Mach-Zehnder modulator; a dispersion module; a second Mach-Zehnder modulator; and a signal conversion module, wherein: the signal generation module is connected to the first Mach-Zehnder modulator, the signal generation module generates a beam of signals comprising two optical signals with different wavelengths, and the first Mach-Zehnder modulator modulates the beam of signals into a first signal, wherein the first signal comprises two signals each carrying a receiving microwave carrier frequency; the dispersion module is connected to the first Mach-Zehnder modulator and the second Mach-Zehnder modulator, and the dispersion module adjusts dispersion of one of the two signals each carrying the receiving microwave carrier frequency, wherein after the dispersion adjustment, a relative phase difference between the two signals each carrying the receiving microwave carrier frequency is 90 degrees; the second Mach-Zehnder modulator mixes a received microwave signal carrying a baseband signal with the two signals each carrying the receiving microwave carrier frequency after the dispersion adjustment to obtain a second signal, wherein the second signal comprises two signals carrying baseband signal spectrum components; and the second Mach-Zehnder modulator is connected to the signal conversion module, and the signal conversion module converts the second signal into a digital signal.