Satellite-borne array microwave frequency conversion switching system based on microwave photons and implementation method

Abstract

The invention discloses a satellite-borne array microwave frequency conversion switching system and method based on microwave photons. The satellite-borne array microwave frequency conversion switching system comprises an electro-optical conversion module, an optical switching matrix and a photoelectric conversion module. Signals pass through the electro-optical conversion module and are exchangedby the optical exchange matrix. Output is completed through the photoelectric conversion module; the electro-optical conversion module comprises a combiner and a modulator for inhibiting carrier waves, the radio frequency signals and the local oscillator signals are combined through the combiner and injected into the modulator for inhibiting the carrier waves to complete electro-optical conversion, and meanwhile frequency mixing in an optical domain is completed; the optical switching matrix comprises a multi-wavelength laser input, a first wavelength division multiplexer, an optical amplifier, a second wavelength division multiplexer and an optical switch matrix which are arranged in sequence. The photoelectric conversion module comprises a photoelectric detector, spurious signals are restrained through the low-pass characteristic of the photoelectric detector, the frequency conversion performance is improved, and frequency conversion signal output is completed. High-performance andhigh-reliability microwave signal frequency conversion and low-power-consumption and high-isolation large-scale exchange are realized.

Description

technical field [0001] The invention belongs to the technical field of microwave signal processing, and in particular relates to a space-borne array microwave frequency conversion switching system based on microwave photons and an implementation method. Background technique [0002] Satellite communication is an effective supplement and necessary backup of the ground communication network, especially in non-populated areas outside metropolitan areas, oceans / plateaus and other areas where users change dynamically. It is the most economical and effective means of communication. In recent years, with the rapid rise of new economic forms such as marine economy and digital economy, satellite communications have put forward higher and higher requirements for higher communication capacity, stronger switching capabilities, and support for signal diversity. Large capacity on satellites The transparent forwarding of multi-band, multi-scale signals has become an important development t...

AI Technical Summary

Problems solved by technology

Among them, microwave transparent forwarding uses traditional microwave technology to realize microwave frequency conversion and switching between receiving and transmitting beams, but the nonlinear distortion of broadband microwave frequency conversion leads to limited dynamic range and limited receiving and processing capabilities. Microwave switching must ensure electromagnetic compatibility and isolation Such performance needs to pay a large price of volume, weight and power consumption, which makes it difficult for microwave transparent forwarding technology to adapt to the requirements of communication satellites to develop larger communication bandwidth, larger switching scale, and higher communication capacity; digital transparent forwarding uses traditional microwave technology to realize microwave Up and down frequency conversion, and use digital technology to realize signal exchange between receiving and transmitting beams after completing the analog / digital conversion at the intermediate frequency. Compared with microwave transparent forwarding technology, it has a larger exchange scale and higher exchange flexibility, but is limited by the analog The bandwidth and adoption rate performance of digital / digital conversion devices and the digital processing capabilities of digital processing devices, single-beam communication bandwidth is still in the order of hundreds of MHz, and the entire star communication bandwidth is still in the order of GHz, and a large power consumption price has been paid. Difficulty resolving conflicts between satcom requirements and payload capabilities

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