Method and device for detecting microwave signal types and frequency based on photon technology

A technology of microwave signal and frequency detection, applied in frequency measurement devices, measurement devices, measurement electricity and other directions, can solve the problems of lack of large instantaneous bandwidth, wide coverage and strong anti-electromagnetic interference performance.

Active Publication Date: 2012-07-18
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Similar requirements have been initially reflected in the scheme based on electronic technology (J.B.Y.Tsui and G.H.Schrick, "Instantaneous frequency (IFM) receiver with capability to seprate cw and pulsed signals

Method used

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  • Method and device for detecting microwave signal types and frequency based on photon technology
  • Method and device for detecting microwave signal types and frequency based on photon technology
  • Method and device for detecting microwave signal types and frequency based on photon technology

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Embodiment Construction

[0035] The implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0036] Such as figure 1 Shown, realize the device of the inventive method by two continuous laser sources 10 and 11, two optical couplers 20 and 21, electro-optic modulator 30, time delay element 40, two erbium-doped fiber amplifiers 50 and 51, two Optical frequency mixing elements 60 and 61, two optical filters 70 and 71, two low-speed optical detectors 80 and 81, and a type resolution and frequency measurement circuit module 90 are formed.

[0037] Under the action of the optical coupler 20, the output optical signals of the laser light sources 10 and 11 (the corresponding angular frequencies are ω 1 and ω 2 ) enter the electro-optic modulator 30 together. Under small signal intensity modulation, the two modulated optical signals can be expressed as: with Then, under the action of the optical coupler 21, it is divided into a delay branch ...

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Abstract

The invention discloses a method and a device for detecting microwave signal types and frequency based on the photon technology. Pulse type or continuous type microwave signals are loaded on two continuous laser signals with different wavelengths through an electrooptical modulator and then divided into a time delay branch and a reference branch. In the time delay branch, two optical signals lead in relative time delay and perform optical mixing, then an optical filter is used for selecting stokes light or anti-stokes light to perform photoelectric detection; and in the reference branch, the two optical signals perform optical mixing directly, and then stokes light or anti-stokes light is selected to perform photoelectric detection. After output of the two branches is processed by a circuit module, identification codes corresponding to signal types and ratio functions corresponding to carrier frequency are obtained respectively, therefore the signal types and the carrier frequency are detected simultaneously. The method and the device aim at achieving simultaneous detection of the microwave signal types and the carrier frequency through the photon technology, and greatly improve instant bandwidth and flexibility of detection.

Description

technical field [0001] The invention relates to the fields of microwave reception and detection, microwave photonics, photon technology and the like, especially the photon technology type microwave detection and analysis technology. Background technique [0002] The detection and analysis of microwave signal parameters, such as frequency (or carrier frequency), amplitude, signal type, modulation system, direction of arrival, etc., is an indispensable key technology in the fields of electronic warfare, radar, and civil communications. . With the continuous expansion of microwave frequency band and bandwidth and the increasing density of microwave signals, detection and analysis methods and devices featuring large instantaneous bandwidth, wide coverage, and strong anti-electromagnetic interference performance need to be solved urgently. Therefore, the implementation of microwave signal detection and analysis with photonic technology has gradually been put on the agenda, and t...

Claims

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Application Information

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IPC IPC(8): G01R31/00G01R23/02H04B10/08H04B10/07
Inventor 邹喜华卢冰潘炜
Owner SOUTHWEST JIAOTONG UNIV
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