频率步进连续波雷达双频电磁辐射假目标特征分析

doi:10.12305/j.issn.1001-506X.2023.05.07

摘要/Abstract

摘要：

在装备复杂电磁环境适应性评估的需求下, 为掌握双频电磁辐射对雷达的假目标干扰规律, 以频率步进连续波雷达为研究对象, 基于理论分析与效应试验, 分析了雷达在单频电磁辐射、双频电磁辐射干扰下产生的假目标的波形特征以及出现位置规律。结果表明, 单频电磁辐射可使受试雷达产生单个“山丘”状假目标, 其出现位置随机; 双频电磁辐射在不发生互调干扰的情形下, 可使受试雷达产生两个“山丘”状假目标, 两者位置随机, 但距离差与双频干扰信号的频差有关; 二阶互调干扰信号可使受试雷达产生单个“尖峰”状假目标, 其位置与互调频差有关。

关键词: 频率步进连续波雷达, 假目标干扰, 双频电磁辐射, 二阶互调

Abstract:

In order to reveal the false target interference laws of dual frequency electromagnetic radiation to radar under the requirement of complex electromagnetic environment adaptability evaluation of equipment, the stepped frequency continuous wave radar is taken as the research object, based on the theoretical analysis and effect test, the waveform characteristics and location laws of false targets generated by radar under the interference of single frequency and dual frequency electromagnetic radiation are analyzed. The results show that, the single frequency electromagnetic radiation can make the tested radar produce a single "hill" false target, and its position is random. The dual frequency electromagnetic radiation can make the tested radar produce two "hill" false targets without intermodulation interference, and the positions of the two targets are random. However, the distance difference is related to the frequency difference of the dual frequency interference signal. The second order intermodulation interference signal can make the tested radar produce a single "spike" false target, whose position is related to the intermodulation frequency difference.

Key words: stepped frequency continuous wave radar, false target interference, dual frequency electromagnetic radiation, second order intermodulation

中图分类号:

TN972
TN95

赵凯, 魏光辉, 王涛, 王雪城, 薛文辉. 频率步进连续波雷达双频电磁辐射假目标特征分析[J]. 系统工程与电子技术, 2023, 45(5): 1315-1322.

Kai ZHAO, Guanghui WEI, Tao WANG, Xuecheng WANG, Wenhui XUE. Characteristics analysis of dual frequency electromagnetic radiation false target for stepped frequency continuous wave radar[J]. Systems Engineering and Electronics, 2023, 45(5): 1315-1322.

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干扰频偏/MHz	假目标位置/m
0	2 359	-	2 312	3 706	-	2 865	826	1 928	2 937	-
0	1 634	2 614	-	-	2 672	4 059	378	757	640	2 635
50	1 093	1 458	3 047	-	401	2 542	4 965	2 519	1 755	-
50	-	1 414	3 647	-	344	571	-	3 202	-	4 636

序号	1	2	3	4	5	6	7	8	9	10
R₁	1 736	1 079	4 771	4 963	3 694	4 182	2 008	4 318	2 365	-
R₂	-	-	1 876	2 083	775	1 277	-	1 423	-	3 452
ΔR	-	-	-2 895	-2 880	-2 919	-2 905	-	-2 895	-	-

序号	11	12	13	14	15	16	17	18	19	20
R₁	-	328	1 713	1 072	770	3 017	1 268	3 535	-	264
R₂	2 830	4 923	-	-	-	128	-	640	3 349	4 874
ΔR	-	4 595	-	-	-	-2 889	-	-2 895	-	4 610

参数	Δf₂/kHz
参数	1.65	3.6	6.6	11.58	14.51	16.51	18.51	20.57	23.5	26.38	58.38	84.38
位置	1 270	2 721	4 929	-	4 117	2 645	1 153	349	2 594	4 835	1 211	3 278
R_IM2	1 238	2 700	4 950	8 685	10 883	12 383	13 883	15 360	17 625	19 785	43 785	63 285

参数	Δf₂/kHz
参数	1.65	3.6	6.6	11.58	14.51	16.51	18.51	20.57	23.5	26.38	58.38	84.38
位置	1 270	2 721	4 929	-	4 117	2 645	1 153	349	2 594	4 835	1 211	3 278
R′_IM2	1 238	2 700	4 950	6 315	4 118	2 618	1 118	360	2 625	4 785	1 215	3 285

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