Microwave photon broadband receiver

Abstract

The invention discloses a microwave photon broadband receiver which is characterized in that 2n frequency multiplication modulation is carried out on an optical carrier outputted by a laser through afirst photoelectric modulator, the frequency of a modulation signal is 1 / 2n of that of a microwave local oscillator signal omega L, and a pair of optical local oscillators with the frequency difference of omega L is obtained through filtering processing of an optical wave trap; a radio frequency signal omega RF received by the antenna is modulated to the optical local oscillator through the secondphotoelectric modulator after passing through the low-noise amplifier, and then enters the photoelectric detector to be converted into an intermediate frequency electric signal omega IF after being processed by the optical filter; a medium-frequency band-pass filter is used for further filtering, and digital signal processing is carried out in an acquisition processing module. Down-conversion receiving processing of cross-band ultra-wideband microwave signals can be achieved, meanwhile, the requirements for large bandwidth, ultra-flexibility, soft programmable control and the like are met, and wide application prospects are achieved in the fields of high-speed communication and radar electronic countermeasures in the future.

Description

technical field [0001] The invention relates to a microwave photon broadband receiver. Background technique [0002] With the rapid development of modern electronic technology, in the fields of radar and high-speed communication, electronic systems have increasingly urgent application requirements for multi-band fusion detection, ultra-large bandwidth perception and countermeasures, and the bottleneck of traditional electronic receiver technology has emerged. Due to bandwidth limitations, it is difficult to use a unified system to realize ultra-wideband signal reception and processing. The system structure is often complex, and the performance deteriorates with the increase of frequency. Microwave photon technology realizes unified processing of cross-band microwave signals in the optical domain, which can effectively overcome the technical bottleneck caused by the limited development level of traditional electronic devices. Microwave photon frequency conversion technology c...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the system bandwidth and phase noise of the series optoelectronic modulation method are easily constrained by the electrical local oscillator signal, the present invention proposes a microwave photonic wideband receiver, which reduces the need for high-frequency electrical local oscillator signals during the frequency conversion process and eliminates the phase drift, the system achieves greater bandwidth and higher performance

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