河南师范大学学报(自然科学版)

2022, v.50;No.226(05) 71-77

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高精度大气折射率测量仪的设计与实现
Design and implementation of high precision atmospheric refractive index measuring instrument

史水娥;高杨;胥帅帅;
Shi Shuie;Gao Yang;Xu Shuaishuai;College of Electronic and Electrical Engineering;Academician Workstation of Henan Electromagnetic Wave Engineering, Henan Normal University;

摘要(Abstract):

由于地球大气的球面分层特性,雷达电波射线在传输过程中会产生大气波导传播现象.产生这种现象的主要原因是大气折射率垂直梯度上的改变,因此获得准确的大气折射率是判断大气波导存在并利用大气波导完成超视距传播的先决条件之一.高精度大气折射率测量仪以锁相技术为基本技术手段、谐振腔微扰为基本原理,利用通入高Q值谐振腔气体的介电常数与谐振腔谐振频率的变化关系,测量出频率变化量,进而反演出大气折射率.测试结果表明,高精度大气折射率测量仪对大气折射率的测量误差小,响应速度快,稳定性高,连续性好,可以有效地判断大气波导存在的高度与强度.
Due to the spherical layered characteristics of the earth's atmosphere, atmospheric duct propagation occurs during the transmission of radar radio waves. The main reason for this phenomenon is the change in the vertical gradient of the atmospheric refractive index. Therefore, obtaining an accurate atmospheric refractive index is one of the prerequisites for judging the existence of atmospheric ducts and using atmospheric ducts to complete beyond-the-horizon propagation. The high-precision atmospheric refractive index measuring instrument uses phase-locking technology as the basic technical means and resonator perturbation as the basic principle. To use the relationship between the dielectric constant of the gas passing into the high Q resonator cavity and the resonant frequency of the resonator cavity to measure the frequency change and then invert the atmospheric refractive index. The measurement results show that the measurement error of the high-precision atmospheric refractive index measuring instrument for the atmospheric refractive index is small, and it responses quickly, with high stability and good continuity, which can effectively judge the existence of atmospheric ducts.

关键词(KeyWords): 高精度;大气波导;高Q值谐振腔;微扰
high precision;atmospheric duct;high Q resonant cavity;perturbation

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(62075057)

作者(Authors): 史水娥;高杨;胥帅帅;
Shi Shuie;Gao Yang;Xu Shuaishuai;College of Electronic and Electrical Engineering;Academician Workstation of Henan Electromagnetic Wave Engineering, Henan Normal University;

DOI: 10.16366/j.cnki.1000-2367.2022.05.010

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