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Wide-range high-precision microwave frequency measurement method and device based on microwave photonics

A frequency and microwave signal source technology, applied in the field of microwave photonics, can solve problems such as difficulty in increasing the frequency bandwidth of electronic systems, large volume and weight of electronic systems, and limited applications

Active Publication Date: 2020-01-31
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] With the rapid development of information technology, the traditional electrical microwave frequency measurement technology will be more and more difficult to increase the frequency bandwidth of the electronic system due to the restriction of the "electronic bottleneck", and the electronic system has a large volume and weight, and expensive high-speed devices cost, which limit its practical application

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  • Wide-range high-precision microwave frequency measurement method and device based on microwave photonics
  • Wide-range high-precision microwave frequency measurement method and device based on microwave photonics
  • Wide-range high-precision microwave frequency measurement method and device based on microwave photonics

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Embodiment 1

[0021] The tunable laser is the TSL-510 tunable laser of Santec Company, the wavelength range of the laser is 1510nm~1630nm; the coupler is a 5:5 coupler; the intensity modulator 1 and the intensity modulator 2 both use the MXAN-LN of Photline Company -20, the bandwidth is 20GHz, the minimum operating point bias voltage measured before the experiment is 6.7V; the phase modulator is MPZ-LN-40 of Photline Company, the bandwidth is 38GHz; the isolation of the isolator is greater than 40dB; the single-mode fiber 1 and Single-mode fiber 2 uses the same single-mode fiber from YOFC, with a length of 14km. When the optical carrier wavelength is 1550nm, the stimulated Brillouin frequency shift V B =10GHz, the measured line width of the stimulated Brillouin gain spectrum is measured as ΔV B =100MHz; Microwave signal source 1 and microwave signal source 2 use microwave signal generator E8257D of Agilent Company, the output frequency range is 100kHz~70GHz; the photoelectric converter is P...

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Abstract

The invention discloses a wide-range high-precision microwave frequency measurement method and device based on microwave photonics, and belongs to the technical field of microwave photonics. The device is composed of a tunable laser, a coupler, a phase modulator, an intensity modulator 1, an intensity modulator 2, a filter, a vector network analyzer, an isolator, a single-mode fiber 1, a single-mode fiber 2, a circulator 1, a circulator 2, a microwave signal source 1, a microwave signal source 2, a DC stabilized power supply 1, a DC stabilized power supply 2 and a photoelectric converter. Thevector network analyzer measures an amplitude-frequency characteristic curve and a phase-frequency characteristic curve, thereby realizing rough measurement and accurate measurement of unknown signalfrequency. According to the invention, two pump lights are adopted to realize gain spectrum loss spectrum cancellation and increase the multi-frequency measurement range; and a phase shift-frequency function curve is constructed based on Brillouin scattering phase-frequency characteristics, and the frequency value of a microwave signal to be measured is obtained through a phase shift-frequency function curve, thereby improving the measurement precision.

Description

technical field [0001] The invention belongs to the technical field of microwave photonics, and in particular relates to a wide-range high-precision microwave frequency measurement method and device based on microwave photonics. Background technique [0002] With the rapid development of information technology, the traditional electrical microwave frequency measurement technology will be more and more difficult to increase the frequency bandwidth of the electronic system due to the restriction of the "electronic bottleneck", and the electronic system has a large volume and weight, and expensive high-speed devices cost, which limit its practical application. The instantaneous frequency measurement (IFM) based on microwave photon technology is applied in communication, navigation, radar, electronic warfare and other systems, and has received extensive attention and research. Microwave photonics combines photonics theory and microwave theory, and takes into account the advanta...

Claims

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Application Information

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IPC IPC(8): G01R23/02G01R23/167G01R23/17H04B10/079
CPCG01R23/02G01R23/167G01R23/17H04B10/0795
Inventor 董玮王迪张歆东
Owner JILIN UNIV
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