Microwave Signal Detection Based on the Nonpolarimetric Frequency Down-Conversion Technique
Microwave Signal Detection Based on the Nonpolarimetric Frequency Down-Conversion Technique
复制标题
基于非偏振降频技术的微波信号检测
DOI：
10.1109/lsens.2020.3013395
复制
发表时间：
2020
影响因子：
2.8
通讯作者：
S. Hisatake
中科院分区：
文献类型：
--
作者：
Haruhiko Takeuchi;S. Hisatake
提出了一种基于非偏振下变频技术的电光微波探测方法。其检测原理是基于电光晶体中光频梳与微波信号相互作用产生的调制边带的相干检测。从理论上分析了这种技术的频率特性。理论计算表明，高阶梳状分量产生的调制边带与梳状分量之间的差拍信号的负干涉降低了光电探测灵敏度，表明光学带通滤波器的陡峭滚降特性将提高低频侧的灵敏度。我们进一步证明，计算的频率特性与实验测量从1 MHz到10 GHz的一致。最后，我们展示了微带线的信号线和接地平面之间的电场可视化。该方法适用于天线测量和电磁兼容性测量。
We report a method for electro-optic (EO) microwave detection based on a nonpolarimetric frequency down-conversion technique. The detection principle is based on the coherent detection of the modulation sideband generated based on the interaction between the optical frequency comb and the microwave signal in the EO crystal. We theoretically analyzed the frequency characteristics of this technique. The theoretical calculation showed that the negative interference of the beat signals between the comb component and the modulation sidebands generated from the higher order comb components decreases the EO detection sensitivity, suggesting that the steeper roll-off characteristics of the optical bandpass filter will increase the sensitivity at the lower frequency side. We further demonstrate that the calculated frequency characteristic agrees well with the experimental measurements from 1 MHz to 10 GHz. Finally, we demonstrate the electric field visualization between the signal line and ground plane of the microstrip line. The proposed method is applicable to antenna measurements and measurements for electromagnetic compatibility.