TEM喇叭天线低频辐射分析与天线设计

王丽黎; 侯荣璞; 原艳宁

doi:10.11884/HPLPB201931.180275

TEM喇叭天线低频辐射分析与天线设计

doi: 10.11884/HPLPB201931.180275

西安理工大学自动化与信息工程学院, 西安 710048

基金项目:

西安市科技计划项目 2017080CG/RC043 (XALG014)

详细信息

作者简介:
王丽黎(1968—), 女, 副教授, 硕士生导师, 从事微波与天线系统与先进导航技术研究, wanglili@xaut.edu.cn

中图分类号: TN823
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- 被引次数: 0
出版历程
- 收稿日期: 2018-10-19
- 修回日期: 2019-04-04
- 刊出日期: 2019-08-15

Analysis and design of low frequency radiation characteristics of TEM horn antenna

School of Automation and Information Engineering, Xi'an University of Technology, Xi'an 710048, China

摘要

摘要: 在超宽带TEM喇叭天线的设计中, 如何改善天线的低频性能是目前研究的关键问题。通过分析天线的阻抗渐变特性与时域辐射特性, 设计了一种新型TEM喇叭天线, 解决了天线末端反射的问题, 提高了天线低频性能。与传统的TEM喇叭天线相比, 新型TEM喇叭天线在全频段减小了方向图后瓣, 提高了低频时天线辐射主轴增益, 拓展了低频带宽。验证实验表明, 该天线带宽为160 MHz~2.5GHz, 180 MHz主轴增益2.3dB, 全频段方向图后瓣小于-2dB, 尺寸为48.5cm×38.1cm×35cm, 同时兼顾了天线的小型化与低频带宽。
- TEM喇叭天线 /
- 末端加载 /
- 低频辐射 /
- 阻抗渐变 /
- 辐射机理
Abstract: Improving antenna performance at low frequency is the focus of TEM horn antenna research.A new TEM horn antenna was designed by analyzing the impedance gradient and time-domain radiation characteristics of the antenna, to solve the reflection problem at the end of the antenna and improve the low-frequency performance of the antenna.Compared with the typical TEM horn antenna, the new TEM horn antenna designed in this paper reduces the pattern back lobe in the full frequency band, improves the antenna radiation spindle gain at low frequency, and expands the low frequency bandwidth.The antenna size is 48.5 cm×38.1 cm×35 cm.The experimental results show that the return loss at 160 MHz, 2.5 GHz is less than-10 dB and the pattern back lobe is less than-2 dB.
- TEM horn antenna /
- end loading /
- low frequency radiation /
- impedance gradient /
- radiation mechanism

HTML全文

图 1 天线1结构图

Figure 1. Structure of antenna 1

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图 2 天线2结构图

Figure 2. Structure of antenna 2

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图 3 两天线反射对比与阻抗分布

Figure 3. Reflection contrast and impedance distribution

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图 4 电场分布对比

Figure 4. Comparison of electric field distribution

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图 5 方向图仿真对比

Figure 5. Simulation of far-field pattern

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图 6 天线2实物图

Figure 6. Physical object of antenna 2

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图 7 S参数对比

Figure 7. S-parameter for antennas

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图 8 天线2方向图测试

Figure 8. Simulated and measured far-field pattern of antenna 2

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表 1 天线结构参数

Table 1. Antenna structure parameters

L/mm	R/mm	a	b	c	d
300	150	5	0.011 9	1.255 9	0.017 5

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表 2 主要宽带高功率天线低频带宽与体积对比

Table 2. Low-frequency bandwidth and volume comparison of main broadband antennas

antenna	minimum frequency/MHz	volume/m³	VSWR
antenna 2 in this paper	160	0.05	2
broadband horn antenna^[11]	200	0.39	2.2
lens antenna^[12]	240	0.2	2
circular antenna^[13]	800	0.01	2
end-loaded antenna^[8]	300	0.06	2
ultra wideband antenna^[14]	1200	0.02	3

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参考文献(14)

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