24 GHz宽波束阵列天线的设计

左全河; 耿友林

doi:10.11884/HPLPB201830.170282

24 GHz宽波束阵列天线的设计

doi: 10.11884/HPLPB201830.170282

左全河,
耿友林^,

杭州电子科技大学电子信息学院, 杭州 310018

详细信息

作者简介:
左全河(1991—)，男，硕士，主要从事阵列天线的研究与设计; 15069510514@163.com

通讯作者:
耿友林(1966—)，男，博士，教授，主要从事复杂介质目标电磁散射解析和数值方法，复杂介质中电波传播特性以及小天线设计等研究; gengoulin@aliyun.com

中图分类号: TN957.2
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出版历程
- 收稿日期: 2017-07-11
- 修回日期: 2017-10-10
- 刊出日期: 2018-02-15

Design of antenna array with 24 GHz wide beam

Zuo Quanhe,
Geng Youlin^,

College of Electronics and Information, Hangzhou Dianzi University, Hangzhou 310018, China

摘要

摘要: 利用Rogers 5880为介质材料设计了一款应用于车载防撞雷达前端的圆极化微带阵列天线，该阵列天线采用直线阵结构，运用了多个四分之一波长阻抗变换器实现了阻抗匹配。仿真和测试结果表明: 该阵列天线的阻抗带宽(S₁₁ < -10 dB)为23.45~25.65 GHz，最大增益为15.54 dB；轴比带宽24.56~25 GHz，轴比最小为1.25 dB；第一副瓣电平小于-20 dB，E面半功率波瓣宽度为10°，H面波瓣宽度为75°，其尺寸为70.94 mm×14.72 mm×0.508 mm。该天线具有高增益、低副瓣、体积小、性能稳定等优点，在汽车防撞雷达系统中有广阔的应用前景。
- 微带天线 /
- 圆极化 /
- 阵列天线 /
- 小型化 /
- 低副瓣
Abstract: Based on Rogers 5880 dielectric material, a radar front-end circular polarization microstrip antenna array for the vehicle collision avoidance system is designed, which adopts linear array structure and many quarter wave impedance converters to achieve impedance matching. Simulation and test results show that the impedance bandwidth of the antenna array (S₁₁ < -10 dB) is from 23.45 GHz to 25.65 GHz, the biggest gain is 15.54 dB; and the AR(axial ratio) bandwidth is from 24.56GHz to 25GHz, the minimum AR is 1.25 dB. The first sidelobe level is -20 dB, E-plane half power beam width is 10°, H side lobe width is 75°, and the size of the dielectric material is 70.94 mm×14.72 mm×0.508 mm. With the advantages like high gain, low side lobe, small size, and stable performance, the practicability of array antenna is verified and it may be widely applied in automobile anti-collision radars.
- micro-strip antenna /
- circular polarization /
- array antenna /
- miniaturization /
- low side lobe

HTML全文

图 1 微带贴片单元结构

Figure 1. Micro-strip patch unit structure

下载: 全尺寸图片幻灯片

图 2 微带贴片天线的回波损耗

Figure 2. Return loss of micro-strip patch antenna

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图 3 微带天线仿真轴比随频率变化曲线

Figure 3. Simulated axial ratio of antenna with frequency

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图 4 微带天线极化增益仿真曲线

Figure 4. Simulated polarization gain of antenna

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图 5 微带阵列天线示意图

Figure 5. Schematic diagram of micro-strip array antenna

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图 6 阵列天线实物图

Figure 6. Photograph of antenna array

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图 7 阵列天线S₁₁仿真和测试曲线

Figure 7. Simulated and measured S₁₁ of antenna array

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图 8 阵列天线轴比随频率变化曲线

Figure 8. Simulated axial ratio of antenna array with frequency

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图 9 阵列天线方向图仿真与实测曲线

Figure 9. Simulated and measured gain of antenna array

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表 1 微带贴片天线的尺寸(单位: mm)

Table 1. Dimensions for micro-strip patch antenna(unit: mm)

W	L	W₁	L₁	W₂	L₂	W₃	d₁	W₄	L₄	a
3.6	3.84	0.04	0.51	0.06	0.53	0.54	0.02	0.09	0.64	0.64

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参考文献(13)

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