Design and Implementation of the Compact Wideband Dual-polarized Antenna for Electromagnetic Compatibility Test

doi:10.12382/bgxb.2023.0670

Abstract

Abstract:

In order to solve the electromagnetic compatibility (EMC) testing problem in specific scenarios such as aircraft cabin, a novel compact wideband dual-polarized antenna is designed and implemented to meet the requirements of EMC test in a small space. Based on the performance analysis of the traditional Vivaldi antenna, a new wideband single-polarized antenna is designed by improving the shape and optimizing the surface current distribution of the traditional antenna. A high isolation dual-polarized EMC test antenna is designed by combining two single-polarized antennas and adopting an asymmetric dual-polarized design method. The simulated and measured results show that the operating frequency band of the antenna is 0.33-3.40GHz (VSWR<2), the directional pattern has no split lobe, the gain is flat in the whole frequency band, the antenna factor reaches 17-36dB/m and the 2-port isolation is above 35dB. The dimension of the combined antenna is 450×450×450mm³, which meets the requirements of the system-level EMC radiation emission test and contributes to enhancing the test efficiency.

Key words: aircraft, EMC test antenna, dual-polarized antenna, wideband antenna

CLC Number:

TM937

QIN Yangzhen, LU Hongmin, WU Fulin, CHEN Peng, LIU Xuan. Design and Implementation of the Compact Wideband Dual-polarized Antenna for Electromagnetic Compatibility Test[J]. Acta Armamentarii, 2024, 45(9): 3253-3260.

Figures/Tables 13

Fig.1 Schematicdiagram of traditional Vivaldi antenna structure

Fig.2 Test antenna model after modification

Table 1 Some parameters of EMC test antenna

参数	数值	参数	数值
R₁/mm	41	W₁/mm	2
R₂/mm	32	W₂/mm	380
R₃/mm	28	W₃/mm	200
R₄/mm	40	W₄/mm	2.3
R₅/mm	90	W₅/mm	4.5
W/mm	450	x₁/mm	200
L/mm	450	x₂/mm	450
L_a/mm	250	y₁/mm	225
θ/(°)	85	y₂/mm	415
α	0.021	h_e/mm	1.5

Fig.3 Comparison of VSWRs before and after modified antennas

Fig.4 The structure diagram of dual-polarized EMC test antenna

Fig.5 Fabricated prototype of EMC test antenna

Fig.6 Measured VSWR of dual-polarized EMC test antenna

Fig.7 Simulated and measured isolation of dual-polarized EMC test antenna

Fig.8 Simulated and measured radiations pattern of EMC test antenna

Fig.9 Measured peak gain of EMC test antenna

Fig.10 Schematic diagram of antenna factor calibration

Fig.11 Measured 1m antenna factor of EMC test antenna

Table 2 Comparison between proposed antenna and industry

天线类型	工作频带/ GHz	整体尺寸/ mm³	是否双极化	天线系数/ (dB·m^-1)
本文设计天线	0.33~3.40	450×450×450	是	17~36
BBHA 9120F	0.2~2.0	680×950×960	否	12~30
XSLP 9143	0.3~3.0	540×690×540	是	15~35
SBA 9113B	0.5~3.0	560×140×49	否	25~43

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