Optoelectronic oscillation loop-based microwave two-third frequency division method and device

Abstract

The invention discloses an optoelectronic oscillation loop-based microwave two-third frequency division method, which comprises the following steps: performing primary carrier suppression optical double-sideband modulation on a photocarrier by use of a microwave signal to be subjected to frequency division, then performing secondary carrier suppression optical double-sideband modulation on a primarily modulated optical signal by use of an oscillation signal, converting a secondarily modulated optical signal into an electrical signal by use of a photodetector, causing the electrical signal to pass through a microwave amplifier, a phase shifter and a microwave filter, dividing the electrical signal into two paths as an oscillation signal and two-third frequency division output respectively,and forming positive feedback oscillation in a two-third frequency division oscillation mode in an optoelectronic oscillation loop, thereby obtaining stable two-third frequency division output. The invention also discloses an optoelectronic oscillation loop-based microwave two-third frequency division device. According to the method and the device, two-third frequency division of any microwave signal can be implemented in an optical domain, and the advantages of great bandwidth, low noise, low spur and little interference to the outside are achieved.

Description

technical field [0001] The invention relates to a microwave frequency division method, in particular to a microwave two-thirds frequency division method and device based on a photoelectric oscillation loop. Background technique [0002] A frequency divider is a device used to convert an input periodic analog or digital signal into an output periodic analog or digital signal, and the output frequency is a partial component of the input frequency. As an important component, it is widely used in modern communication systems and radar detection systems. When applied to a communication system, in order to cope with signal generation, modulation and demodulation of different rates, the frequency divider provides a variable clock signal to the system based on its own reference clock; when applied to a radar detection system, the frequency divider acts as An important part of the frequency synthesizer, providing functions including local oscillator frequency division and phase-lock...

AI Technical Summary

Problems solved by technology

However, when the technology does not inject signals, the optoelectronic oscillator will still output microwave signals and the frequency of the output microwave signals is near the frequency division of the injected signals, which may cause interference to the system.

At the same time, when this technology is used for different input frequencies or different frequency division ratios, it is necessary to replace narrow-band filters with different center frequencies to match them, which greatly reduces the practicability of the system.

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