Novel microwave source

Abstract

The invention discloses a microwave source, and the microwave source comprises a semiconductor laser, a photoelectric modulator, a first optical coupler, a first polarization controller, a second polarization controller, a second optical coupler, a resonant cavity module, an optical detector, a filter and a directional coupler, wherein the semiconductor laser, the photoelectric modulator and the first optical coupler are sequentially connected along an optical path; one output end of the first optical coupler is connected with the input end of the first polarization controller, and the other output end of the first optical coupler is connected with the input end of the second polarization controller; the output end of the first polarization controller is connected with one input end of thesecond optical coupler; the output end of the second polarization controller is connected with the other input end of the second optical coupler; the second optical coupler, the resonant cavity module, the optical detector, the filter and the directional coupler are connected in sequence; and the directional optical coupler is connected with the photoelectric modulator. According to the invention, the extremely low phase noise can be obtained, the spurious wave suppression level is good, the cost is low, and the optical path adjustment is simple.

Description

technical field [0001] The invention relates to a microwave source. More specifically, it relates to a novel microwave source capable of substantially suppressing the amplitude of spurious signals. Background technique [0002] Microwave frequency sources with low phase noise and high stability are widely used in radar, communication measurement and other fields, and are the core components of modern electronic devices. [0003] There are generally three ways to obtain microwave sources: [0004] 1. Standard crystal oscillator frequency multiplication method; [0005] 2. Using the low loss of the medium, design a high-Q dielectric resonant cavity, construct a positive feedback amplifier circuit, and control the phase and amplitude to improve the stability of the output signal; such as ZL201510357893.X; "Ultra-low vibrationpulse- tube cryocooler stabilized cryogenic sapphire oscillator with 10-16fractional frequency stability",IEEE TRANS.ON MICROWAVE THEORY ANDTECHNIQUES,V...

AI Technical Summary

Problems solved by technology

[0010] An object of the present invention is to provide a microwave source to solve the problems of high spurious level and large phase noise of the microwave output signal in the photoelectric oscillator existing in the prior art

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