Horizontally polarized radiation-wave simulator with two different wire grating structures
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摘要: 比较了末端收拢和均匀拉线的双锥-平面线栅水平极化辐射波模拟器辐射场的分布规律,讨论了拉线根数和收拢组数对辐射场的影响。结果表明,双锥中心正下方测点辐射场基本不受线栅结构变化的影响。对于其他位置,两种结构的模拟器各有特点:拉线根数相同时,末端均匀拉线的模拟器可令辐射场强提高约5%~20%,但前沿会变慢10%左右;末端收拢的模拟器场强幅值相对较低,但具有较快的前沿,并且架设相对容易。增加拉线根数和收拢组数有利于提高辐射场强,但场强增加的幅度逐渐减小。拉线根数由24增加到96时前沿可加快约10%,半宽变化不大。增加收拢组数会使前沿变慢。综合辐射场变化规律及施工难易程度,可令末端均匀拉线模拟器的拉线根数取48,此时对收拢结构的天线,可令收拢组数取16。Abstract: This paper compares the E-field distributions of two horizontally polarized radiation-wave simulator with different wire grating structure. The antenna wires of one simulator are uniformly distributed on the ground, while the other simulator’s antenna wires are converged to several groups at the end. Meanwhile, the influences of wire number and group number on the radiated field are discussed. Results show that the E-fields below the bicone apex are not affected by the wire grating structure. While in other positions, the E-field characteristics of the two simulators are different: when the wire number is the same, the simulator with uniform wire will increase the E-field amplitude by 5% to 20%, but its rise time increases about 10% at the same time; the simulator whose antenna wires are converged shows lower E-field amplitude, but its rise time is shorter. Besides, the latter is easy to establish in practice. On the other hand, increasing the wire number and wire group is helpful to improve the radiation amplitude, but the improvement reduces gradually. If the wire number increases from 24 to 96, the rise time can be improved by about 10%, but the half width of radiated E-field shows little difference. The increase of group number will lead to longer rise time. Taking into account the variation law of the E-field and the complexity to establish, the wire number of the simulator with uniform wire can be set to 48, and for the simulator whose antenna wires are converged, the group number can be set to 16.
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表 1 拉线根数不同时两种结构天线辐射场参数比较
Table 1. Comparison of E-field parameters under different grating wire number
coordinates/m rise time/ns half-width/ns end-tucked antenna uniformly distributed antenna end-tucked antenna uniformly distributed antenna 24 wires 48 wires 96 wires 24 wires 48 wires 96 wires 24 wires 48 wires 96 wires 24 wires 48 wires 96 wires (0 0 5) 2.6 2.5 2.6 2.6 2.6 2.6 24.1 24.8 25.0 25.1 25.8 26.2 (5 0 3) 2.8 2.6 2.5 3.0 3.0 2.9 16.8 16.8 16.9 17.1 17.1 17.1 (5 2 3) 2.8 2.5 2.6 3.1 2.9 2.9 16.6 16.6 16.7 16.8 17.0 16.8 (5 0 5) 2.8 2.5 2.4 3.1 2.7 2.7 21.0 20.8 20.6 22.6 22.7 22.8 (5 2 5) 3.0 2.5 2.5 3.1 2.8 2.7 22.0 22.3 22.3 22.9 22.9 23.0 表 2 末端收拢的双锥-平面线栅天线测点电场的波形参数
Table 2. E-field parameters of the end-tucked biconical-wire grating simulator
coordinates/m peak E-field/(V·m−1) rise time/ns half-width/ns 6 groups 12 groups 16 groups 24 groups 48 groups 6 groups 12 groups 16 groups 24 groups 48 groups 6 groups 12 groups 16 groups 24 groups 48 groups (10 0 1) 1050 1263 1311 1361 1410 2.2 2.4 2.5 2.6 2.7 4.4 4.5 4.6 4.5 4.6 (10 2 1) 1170 1297 1322 1366 1415 2.3 2.5 2.6 2.6 2.6 4.4 4.5 4.5 4.6 4.7 (5 0 1) 1907 1956 1969 1979 1997 2.5 2.7 2.7 2.7 2.8 5.8 5.9 6.0 6.0 6.0 (5 2 1) 1899 1941 1956 1967 1985 2.5 2.7 2.7 2.8 2.9 5.8 5.8 6.0 5.8 5.9 (5 0 3) 2212 2320 2345 2375 2408 2.6 2.7 2.7 2.8 2.9 16.8 17.1 17.1 17.1 17.1 (5 2 3) 2240 2318 2345 2369 2397 2.5 2.7 2.8 2.9 2.8 16.6 16.8 16.8 16.8 17.0 (5 0 5) 2447 2729 2787 2839 2896 2.2 2.6 2.7 2.7 2.7 20.5 22.3 22.6 22.6 22.7 (5 2 5) 2787 2816 2881 2929 2941 2.2 2.1 2.2 2.3 2.8 22.0 23.0 22.8 23.0 22.9 -
[1] 李亚南, 谭志良. 基于PIN二极管的快上升沿电磁脉冲防护模块设计与研究[J]. 兵工学报, 2018, 39(10):2066-2072. (Li Ya’nan, Tan Zhiliang. Design and research of the fast rise time electromagnetic pulse protection module based on PIN diode[J]. Acta Armamentarii, 2018, 39(10): 2066-2072 doi: 10.3969/j.issn.1000-1093.2018.10.021 [2] 刘青, 谢彦召. 高空电磁脉冲作用下埋地电缆的瞬态响应规律[J]. 高电压技术, 2017, 43(9):3014-3020. (Liu Qing, Xie Yanzhao. Transient response law of buried cable to high-altitude electromagnetic pulse[J]. High Voltage Engineering, 2017, 43(9): 3014-3020 [3] 谢霖燊, 吴伟, 朱湘琴. 分布式负载垂直极化有界波电磁脉冲模拟器外泄场的规律分析[J]. 强激光与粒子束, 2020, 32:055002. (Xie Linshen, Wu Wei, Zhu Xiangqin. Regularity analysis of leakage-field from vertically polarized bounded wave electromagnetic pulse simulator with distributed load[J]. High Power Laser and Particle Beams, 2020, 32: 055002 [4] Blundell R. Horizontally polarized dipole—II electromagnetic pulse simulator[C]//Proceedings of the European Electromagnetics International Symposium on Electromagnetic Environment and Consequences. 1994, 2: 1159-1165. [5] 杜立航, 高成, 陈海林, 等. 金属挡板对平行线栅有界波模拟器的影响仿真研究[J]. 强激光与粒子束, 2018, 30(7):073204. (Du Lihang, Gao Cheng, Chen Hailin, et al. Simulation study on influence of metal plate on parallel wire-grid bounded-wave simulator[J]. High Power Laser and Particle Beams, 2018, 30(7): 073204 doi: 10.11884/HPLPB201830.170465 [6] Bailey V, Carboni V, Eichenberger C, et al. A 6-MV pulser to drive horizontally polarized EMP simulators[J]. IEEE Transactions on Plasma Science, 2010, 38(10): 2254-2258. [7] IEC 61000-2-9, Description of HEMP environment-radiation disturbance basic EMC publication[S]. [8] 傅海军, 张维刚, 岳思橙, 等. 系统级电磁脉冲模拟试验技术[J]. 现代防御技术, 2018, 46(3):127-132. (Fu Haijun, Zhang Weigang, Yue Sicheng, et al. Electromagnetic pulse simulating test methods on system level[J]. Modern Defense Technology, 2018, 46(3): 127-132 [9] Dhoot V, Gupta S. Return loss validation of a novel cantor based antenna using FIT and FDTD[C]//Proceedings of 2011 International Conference on Communications and Signal Processing. Calicut: IEEE, 2011: 374-378. [10] Yao Lijun, Shen Tao, Kang Ning, et al. Time-domain simulation and measurement of a guided-wave EMP simulator’s field uniformity[J]. IEEE Transactions on Electromagnetic Compatibility, 2013, 55(6): 1187-1194. doi: 10.1109/TEMC.2013.2257795 [11] Giri D V, Baum C E. Design guidelines for flat-plate conical guided-wave EMP simulators with distributed terminators[R]. Sensor and Simulation Note 402, 1996.