A VHF Ultra-wideband Vivaldi Antenna with Loading Structure for EMC Test

2022 International Conference on Microwave and Millimeter Wave Technology (ICMMT) Pub Date : 2022-08-12 DOI:10.1109/ICMMT55580.2022.10022458

Chenxuan Gu, Peng Zhou, Shunli Li, Hongxin Zhao, Xiaoxing Yin

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Abstract

In this paper, a VHF ultra-wideband Vivaldi antenna with loading structure for electromagnetic compatibility (EMC) test is proposed. The antenna is composed of a half traditional Vivaldi antenna loading corrugated edge and a metal ground. According to the principle of image, the size of the Vivaldi antenna can be reduced to half due to the application of a metal ground. In addition, the corrugated edge is introduced to reduce the lowest operating frequency. The electrical size of the proposed antenna is $0.68\lambda_{0}\times 0.21\lambda_{0} (\lambda_{0}$ is the wavelength of lowest working frequency in free space). The lowest operating frequency is reduced and radiation directivity is improved due to the corrugated edge. The performance comparison between the antenna with loading structure and the traditional one and the influence of loading corrugated edge are analyzed in the paper. The simulation results show that the cut-off frequency is reduced from 162.8 MHz to 127.4 MHz with 21.7% fractional bandwidth. In the VHF band, the maximum gain of the antenna can reach 9.67 dBi.

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一种用于电磁兼容测试的VHF超宽带加载结构维瓦尔第天线

提出了一种用于电磁兼容性测试的VHF超宽带加载结构维瓦尔第天线。该天线由半传统维瓦尔第天线和金属接地组成。根据成像原理，由于采用金属接地，维瓦尔第天线的尺寸可以缩小一半。此外，还引入了波纹边，以降低最低工作频率。该天线的电尺寸为$0.68\lambda_{0}乘以$ 0.21\lambda_{0} (\lambda_{0}$是自由空间中最低工作频率的波长)。由于波纹边缘的存在，降低了最低工作频率，提高了辐射指向性。分析了加载结构天线与传统结构天线的性能比较以及加载波纹边对天线性能的影响。仿真结果表明，截止频率从162.8 MHz降低到127.4 MHz，带宽分数为21.7%。在VHF频段，天线的最大增益可达9.67 dBi。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2022 International Conference on Microwave and Millimeter Wave Technology (ICMMT)

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