线栅参数对双锥-平面线栅水平极化辐射波模拟器的影响

doi:10.3969/j.issn.1000-1093.2021.08.015

摘要/Abstract

摘要： 通过电磁仿真重点研究线栅天线金属拉线的疏密和线径对双锥-平面线栅结构的水平极化辐射波天线辐射特性的影响。采用三维电磁仿真软件建立双锥-平面线栅天线的模型，在脉冲源和激励等参数相同的情况下，设单侧线栅天线拉线根数分别为24根、48根、96根和192根，研究不同条件下辐射场的特性，分析不同疏密栅板天线的作用机理；令金属拉线的半径在1~40 mm之间变化，研究拉线线径对辐射场的影响；估计该型模拟器的实验区域。结果表明：双锥中心正下方测点基本不受线栅疏密程度和拉线线径的影响，其他位置上，线栅疏密主要影响电场水平极化分量的前沿和峰值，线栅越疏，前沿越小，峰值越低；对于给定测点，当拉线根数由24根增加到192根时，峰值变化率约5%，前沿变化率约10%，随着拉线根数增加，峰值变化率逐渐减小，根数超过96根后，峰值基本不变；拉线线径对辐射场的影响可以不计。天线样机实验证明，当单侧极板拉线根数为48根时，距地面4 m高水平面上模拟器实验区范围为12 m×16 m.

关键词: 电磁脉冲模拟器, 水平极化辐射波, 线栅, 双锥天线

Abstract: The effects of wire density and width of wire grating antenna on the radiation characteristics of horizontally polarized radiated-wave antenna with biconical-wire grating structure are studied through electromagnetic simulation. The 3D electromagnetic simulation software is applied to build a model of biconical-wire grating antenna. In the cases of the same parameters of pulse source and excitation, the wire number of each wire plate is set to 24, 48, 96 and 192 to study the operational principle of wire plate antenna with different densities. The radius of wire is varied from 1 mm to 40 mm to analyze its effect on the radiation field. The experimental area of the simulator is estimated. It shows that the measuring points right below the bicone center are basically unaffected by wire density and width, while at other measuring points, the wire density has an effect on the leading edge and peak value of the polarization component. Generally, larger wire density will cause smaller leading edge and peak value. When the wire number is increased from 24 to 192, the peak value and leading edge changes about 5% and 10%, respectively. But the changing rate of peak value gradually decreases with the increase in wire number. When wire number exceeds 96, the peak value is basically unchanged. The influence of wire width on radiation field can be ignored. Experimental result shows that the simulator experimental area at 4 m above the ground is a rectangle with the size of 12 m×16 m.

Key words: electromagneticpulsesimulator, horizontallypolarizedradiation-wave, wiregrating, biconicalantenna

中图分类号:

TN821⁺.1

肖晶，吴刚，谢霖燊，王海洋，孙楚昱. 线栅参数对双锥-平面线栅水平极化辐射波模拟器的影响[J]. 兵工学报, 2021, 42(8): 1708-1715.

XIAO Jing, WU Gang, XIE Linshen, WANG Haiyang, SUN Chuyu. Influence of Wire Grating on Horizontally Polarized Radiated-wave Simulator with Biconical-wire Grating Structure[J]. Acta Armamentarii, 2021, 42(8): 1708-1715.

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