An instantaneous microwave frequency measurement device and method based on dispersion Fourier transform

A microwave frequency measurement and Fourier transform technology, applied in the field of microwave photonics, can solve the problems of the mutual restriction between the measurement frequency range and accuracy, the inability to achieve multi-tone microwave measurement, and the inability to measure multi-tone signals, so as to overcome the measurement blind area. , The effect of reducing the measurement error and improving the measurement resolution
CN111901035BActive Publication Date: 2021-11-16CHONGQING UNIV OF POSTS & TELECOMM
5 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHONGQING UNIV OF POSTS & TELECOMM
Publication Date
2021-11-16

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention claims an instantaneous microwave frequency measurement device and method based on dispersion Fourier transform, which belongs to the field of microwave photon technology and is mainly used in the measurement of instantaneous microwave signal frequency. The device includes an ultrashort pulse light source, a dispersion Fourier transform module I, an electro-optical intensity modulator, an optical power divider, a dispersion Fourier transform module II, a nonlinear photon mixing module, a photodetector I, and a photodetector II, a microwave power coupler and a spectrum analysis module; the dispersion Fourier transform module is a dispersion medium, which can be a single-mode fiber or a fiber grating, and is used to realize the stretching and broadening of the optical pulse width of an ultrashort pulse light source; the non- The linear photon mixing module realizes photon mixing by using nonlinear effects such as cross-gain modulation effect and four-wave mixing effect, and can be a highly nonlinear optical fiber or a nonlinear semiconductor optical amplifier. The invention has the advantages of instantaneous, multi-tone, wide frequency, high precision and no blind zone frequency measurement.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the field of microwave photonics, and in particular relates to an instantaneous microwave frequency measurement technology based on dispersion Fourier transform time stretching frequency reduction. Background technique

[0002] Microwave / millimeter wave technology is more and more widely used in national defense technology, microwave communication, industrial and agricultural production, and daily life, especially in the fields of electronic warfare, radar early warning, wireless communication and space communication. As microwave operating frequencies in various application fields gradually expand to high frequency bands (even as high as 300 GHz), due to the limitation of electronic bottlenecks and instantaneous bandwidth, the real-time measurement and analysis of microwave signals using traditional electronic domain frequency measurement technology appears to be powerless. It is particularly important to develop the correspon...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More