Superheterodyne microwave photon receiving system and method

Abstract

The invention relates to a superheterodyne microwave photon receiving system which comprises an electric preprocessing unit, a carrier laser, an electro-optic up-conversion unit, a local oscillator laser, a photoelectric down-conversion unit, an electric local oscillator source, a high-intermediate frequency down-conversion unit and the like. The electric preprocessing unit is used for carrying out frequency band pre-selection filtering on a to-be-measured microwave signal and then inputting the signal into the electro-optical up-conversion unit. The electro-optical up-conversion unit is usedfor up-converting the microwave signal to an optical carrier output by the carrier laser to obtain an optical carrier microwave signal; the local oscillator laser is used for generating an all-opticallocal oscillator; the photoelectric down-conversion unit is used for down-converting the optical carrier microwave signal into a high-intermediate frequency signal by using an all-optical local oscillator; the electric local oscillator source is used for generating a high-intermediate frequency electric local oscillator; and the high-intermediate frequency down-conversion unit is used for down-converting the high-intermediate frequency signal into a low-intermediate frequency signal or a baseband signal. According to the invention, a two-stage frequency conversion mode is utilized, and an ultra-wideband all-optical local oscillator is combined to replace the traditional pure electric frequency conversion and microwave photon frequency conversion modes, so that the frequency conversion technical bottleneck in the ultra-wideband receiving technology is solved.

Description

Technical field[0001]The present invention relates to the field of microwave photons and microwave radio frequency technologies, and more particularly to an ultra-extraortary phase microwave photon receiving system and method.Background technique[0002]The current receiver system is a traditional pure electronic device and technology, and a typical system architecture has two categories: heterodyne architecture and zero difference architecture. The heterodyne architecture changes the microwave signal to low intermediate frequency, has a good mirroring and other spurious suppression capabilities and a large dynamic range, but the system is complex, the instantaneous band is small, often used by high-end equipment such as spectrum analyzers. The zero difference architecture directs the microwave signal to the baseband, the structure is simple, the instantaneous bandwidth is large, but the murdion of mirroring is poor, the dynamic range is smaller, and is often used by a communication r...

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is that the existing technology is limited by the ultra-wideband electric local oscillator source, and there are spurious interferences, and the problem that low-frequency microwave signals cannot be effectively converted. The present invention provides an ultra-external The differential microwave photon receiving system makes the receiver have higher comprehensive application performance in terms of operating spectrum range, instantaneous bandwidth, image and spurious suppression, low nonlinearity, etc.

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