High-integration frequency accurate tuning optoelectronic oscillator structure and working method

Abstract

The invention discloses a high-integration frequency accurate tuning optoelectronic oscillator structure and a working method, the core of the structure is a high-efficiency integrated tunable microwave link, the structure mainly comprises a radio frequency amplifier, a phase-locked loop, an active loop filter, a voltage-controlled oscillator, a power divider and other devices, and the devices are integrated into a radio frequency module. Accurate tuning of the output frequency of the optoelectronic oscillator is achieved through the voltage-controlled oscillator and the phase-locked loop structure, the phase-locked frequency of the phase-locked loop is controlled through a serial port, the phase-locked frequency directly affects the output signal frequency of the optoelectronic oscillator, and according to the radio frequency link scheme, indexes such as the output frequency range, the frequency tuning precision and the volume power consumption are obviously improved; rapid frequency regulation and control can be realized, and the key technology of rapid tunable microwave photoelectric oscillation is broken through.

Description

technical field [0001] The invention relates to the technical field of a structure and a working method of a high-integrated frequency-accurately tuned photoelectric oscillator. Background technique [0002] As one of the core parts of radar, communication and precision measurement systems, microwave and millimeter wave signal sources need to meet the characteristics of large bandwidth frequency tuning and low phase noise. In the frequency hopping or spread spectrum communication system, the large bandwidth frequency tuning can improve the anti-interference ability and communication ability of the system. For microwave measurement instruments, wide bandwidth frequency tuning can greatly improve measurement accuracy and integrity. For Doppler radars that identify moving targets, the detection of targets is greatly affected by phase noise. For example, an enemy target moves towards the radar at a speed of 500 km / h. Assuming that the radar works in the X-band, the emission f...

AI Technical Summary

Problems solved by technology

Relatively speaking, in terms of phase noise and system complexity, the optoelectronic oscillator has obvious advantages, but the frequency stability of the output signal of the optoelectronic oscillator is poor, and its frequency tunability also needs to be improved

In order to solve the problem of poor frequency stability and tunability of the output signal of the optoelectronic oscillator, new principles and methods need to be proposed

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