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Down-conversion microwave signal frequency measurement method and device based on finite time stretching

A microwave signal and finite time technology, applied in the field of frequency measurement method and device based on finite time stretching down-conversion microwave signal, can solve the problems of limited measurement range, low measurement accuracy, and inability to meet high-precision measurement of broadband microwave signals, etc. Achieve the effect of wide optical analog bandwidth and high-precision frequency measurement

Inactive Publication Date: 2019-07-30
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0004] To sum up, the microwave photon frequency measurement schemes reported so far have more or less the following problems: first, the measurement accuracy is not high; second, the measurement range is limited
Therefore, it is impossible to meet the high-precision measurement of broadband microwave signals in an increasingly complex radio frequency environment

Method used

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  • Down-conversion microwave signal frequency measurement method and device based on finite time stretching
  • Down-conversion microwave signal frequency measurement method and device based on finite time stretching
  • Down-conversion microwave signal frequency measurement method and device based on finite time stretching

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Embodiment

[0044] This example uses MATLAB software for simulation. Under the following specific parameters, a numerical simulation is carried out on the microwave signal frequency measurement method based on finite optical time-stretching down-conversion provided by the present invention. The passive mode-locked light source (1) generates light pulses with a pulse width of 176 femtoseconds and a repetition frequency of 10 MHz. The first dispersion medium (3) is a dispersion compensating optical fiber with a length of 18km, and the second dispersion medium (5) is a dispersion compensating optical fiber with a length of 2km, thereby realizing down-frequency to one-tenth of the microwave signal to be measured. Both modulators have an analog bandwidth of 50GHz and a bridge bandwidth of 2.5GHz to 50GHz. Based on the above settings, the frequency range of the system is 2-50 GHz.

[0045] Depend on figure 2 It can be seen that the microwave signal with a frequency of 47.7 GHz is loaded on ...

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Abstract

The invention relates to the technical field of photoelectricity, in particular to a down-conversion microwave signal frequency measurement device based on finite time stretching and an implementationmethod. According to the method, frequency measurement of microwave signals is achieved through combination of optical time stretching and down-conversion, and the approximate real-time frequency measurement effect is achieved through the optical time stretching method by changing parameter configuration of an optical time stretching system and adding a first-level modulator.

Description

technical field [0001] The invention relates to the field of optoelectronic technology, in particular to a method and device for measuring frequency of down-converted microwave signals based on finite time stretching. Background technique [0002] With the development of microwave photonics, the method of measuring the frequency of microwave signals by using microwave photonic technology has attracted extensive attention because of its advantages such as large frequency range, high precision, and effective elimination of electromagnetic interference. [0003] At present, microwave signal frequency measurement methods based on microwave photonic technology are divided into three categories: frequency-power mapping, frequency-time mapping and frequency-space mapping. The frequency-power mapping method modulates the microwave signal to be measured onto the light wave, and uses the dispersion power penalty to measure the frequency of the microwave signal. Nguyen et al. used this...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/50H04B10/524
CPCH04B10/5051H04B10/524
Inventor 熊远靖刘永凌远
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA