An Arbitrary Delay Method for Radio Frequency Signals Based on Microwave Photon Cyclic Frequency Shift

Abstract

The invention discloses a radio frequency signal random delay device and a radio frequency signal random delay method based on a microwave photon cycling frequency shift, and relates to the field of optical communication techniques, microwave techniques and electronic countermeasure techniques, mainly used for storing a radio frequency signal in an electronic countermeasure radar jamming system. The method is as shown in figures. The device comprises a light source 1, a polarization controller 2, a phase modulator 3, an optical band pass filter 4, a 2*2 optical coupler 5, a radio frequency source 6, a 90-degree radio frequency orthocoupler 7, a double parallel mach-zehnder modulator 8, a standard single mode fiber 9, an erbium-doped optical fiber amplifier 10, a wavelength division multiplexer 11, a photoswitch matrix 12, an adjustable delay module 13 and a photoelectric detector 14. The phase modulator is used for receiving the radio frequency signal. An optical loop is used for being in combination with the double parallel mach-zehnder modulator to perform frequency shift delay on the signal. And delay storage of the radio frequency signal at any time is finally achieved by the wavelength division multiplexer and the switch matrix, in combination with the adjustable delay module.

Description

technical field [0001] The invention relates to the technical fields of optical communication, microwave and electronic countermeasures, and mainly relates to the use of photonics technology to realize the reception of radio frequency signals and the storage of arbitrary delays. Background technique [0002] In modern warfare, the opposing sides will use specific electronic countermeasures to interfere with the enemy's electronic equipment. In modern radar systems, since the receivers match the waveform of the transmitted radar signal, the anti-jamming ability of the radar is strong, and the traditional jamming methods can no longer meet the needs. Therefore, for the radar jamming system, it is necessary to make a quick response to achieve the jamming effect on the enemy's radar. Therefore, not only the jamming signal sent by it is required to be highly matched with the enemy's radar signal, but also it is required to respond quickly. The radar jamming technology based on r...

AI Technical Summary

Problems solved by technology

Add an optical filter to the optical fiber ring to prevent the signal from infinitely looping and causing excessive signal power in the ring

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