Device and method for generating x-band high-speed frequency sweep signal based on photoelectric oscillator

Abstract

The invention discloses an X-band high-speed frequency sweep signal generation device and method based on a photoelectric oscillator, including a frequency sweep laser, a phase modulator, an erbium-doped fiber amplifier, an adjustable optical attenuator, a dispersion compensation module, and a looper , optical fiber, polarization controller, photodetector, microwave signal amplifier, oscilloscope or spectrum analyzer. The present invention focuses on the new optoelectronic technology, especially the development and innovation of microwave photonics to change the structural design of the microwave sweep signal, and proposes an X-band microwave signal generation method based on a photoelectric oscillator, and uses the frequency sweep laser tuning ring channel parameters to obtain the X-band microwave frequency sweep signal with continuously adjustable oscillation frequency. At the same time, the present invention uses the dispersion compensation module to complete the corresponding optical fiber delay line function in the traditional photoelectric oscillator, so that the generated microwave frequency sweep signal ensures very small frequency switching. The time interval and the high-speed sweeping rate lay the foundation for the application of the present invention in the generation of microwave sweeping signals.

Description

technical field [0001] The invention relates to a method and device for generating a microwave frequency sweep signal, in particular to a device and method for generating an X-band high-speed microwave frequency sweep signal based on a photoelectric oscillator. Background technique [0002] With the development of electronic science and technology, people pay more and more attention to frequency sweep measurement technology, especially the X-band linear frequency sweep source for radio communication, radio and television, radar navigation, satellite ground station and other equipment testing, as well as the analysis and analysis of related circuits. Research provides great convenience. The traditional digital sweeping source is mainly realized based on frequency synthesis technology. The development of frequency synthesis technology has gone through three stages: direct frequency synthesis technology, phase-locked frequency synthesis technology, and direct digital frequency...

AI Technical Summary

Problems solved by technology

In addition, although it has been reported in relevant literature that photoelectric oscillators can be applied to the generation of microwave signals of different frequencies, in practical applications, since the length of the fiber delay line is often greater than 1Km, if it is used to generate microwave frequency sweep signals, it will inevitably lead to The frequency switching time interval for generating microwave frequency sweep signals is greater than 50ms, so the low frequency sweep rate restricts the application of optoelectronic oscillators in the generation of microwave frequency sweep signals

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