Low-power microwave signal integrated processing method and integrated receiver

Abstract

Micro-low power microwave signal integrated processing method and integrated receiver, firstly, the present invention realizes the extraction and amplification of low power microwave signal through a photoelectric hybrid loop, and modulates the optical carrier, and then uses the phase-shifting fiber grating to extract the already Dimming signal; at the same time, an optoelectronic hybrid oscillation signal is generated through another photoelectric hybrid loop to obtain a local oscillator optical signal coherent with the dimmed signal; then, the envelope detection function of the photodetector is used to realize the dimmed signal The frequency mixing of the optical signal realizes the down-conversion function of the microwave signal; finally, the out-of-band noise is suppressed through the low-pass filter to realize the output of the intermediate frequency signal. Based on the advantages of large bandwidth, low loss, and anti-electromagnetic interference of optical fibers, the present invention completes the reception of low-power microwave signals in the optical domain, ensures extremely low noise introduction, effectively suppresses image signals, and simplifies system complexity. Electromagnetic interference, realizing the integrated reception of amplification, filtering and down conversion functions.

Description

Technical field [0001] The present invention relates to the intersection of microwave technology and optical communication technology, particularly to a low-power microwave signal integrated processing method and an integrated receiver. Background [0002] The detection of microwave signals in complex electromagnetic environments has important applications in many fields such as remote sensing telemetry, radio frequency communications, radar, and electronic warfare systems. [0003] In a complex electronic environment, useful low-power microwave signals may coexist with complex noise environments, and the detection of weak microwave signals is difficult. The reception of traditional microwave signals mainly includes three parts: amplification, filtering, and downconversion: that is, the microwave signal is received through the antenna, and then the microwave signal is amplified, and the downconversion process is carried out after filtering, and finally the intermediate frequency ...

AI Technical Summary

Problems solved by technology

In a traditional microwave signal receiving system, a microwave amplifier is required to realize the amplification function. The microwave amplifier is a typical active device and will introduce relatively large noise; the filter has a low Q value in the microwave frequency band and a large bandwidth, which cannot effectively suppress out-of-band noise. ; At the same time, the down-conversion process needs to be completed by a mixer and an oscillator source, which will also generate additional noise and image signals and other interference factors

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