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摘要随着无线通信系统的快速发展，圆极化技术及双频或多频技术已经成为了近年来天线领域的热门研究方向。为了获取更好的通信质量以及更高的通信容量，将圆极化技术与双频技术相结合成为了天线的一种发展趋势。本论文在前人工作的基础上，设计了一种更为简便紧凑的双频双圆极化微带阵列天线。该阵列基于顺序旋转法，通过合理的馈电网络的设计在单层介质板上实现了共孔径设计。在具体设计中，首先设计出双频微带线极化单元，然后采用顺序旋转法，利用电磁仿真软件HFSS进行了仿真优化设计。仿真结果显示该阵列天线的轴比带宽（AR<2）在8.22GHz和11.28GHz两个频段上分别为10.34%(左旋圆极化）,和13.56%（右旋圆极化）。在仿真验证的基础上，我们还对该天线进行了实物的加工和测试，测试结果和仿真结果基本相符。47854
毕业论文关键词 双频 双圆极化 微带天线 顺序旋转
毕业设计说明书外文摘要
Title Research on Broadband Mircrostrip Array Antenna with Dual-Band Circular Polarization
Abstract
With the development of wireless communication devices, circular polarization technology and dual-frequency or multi-frequency technologies have become hot areaes of the antenna field in recent years. In order to obtain better communication quality and higher communication capacity, combining the circular polarization technology and dual-frequency technology has become a trend of antenna. In this paper, on the basis of previous work, a more simple and compact broadband dual-band and dual-circularly-polarized microstrip array antenna is designed. The array is based on the sequential rotation method, using reasonable feed network to realize shared-aperture array antenna with single-layer substrate. In the design, a dual-band linearly-polarized element was determined firstly, then the array based on sequential ratation technique. The electromagnetic simulation software HFSS was used to simulate the model. The results show that the circularly-polarized bandwidth（AR<2）of the array antenna is 10.34% at 8.22GHz (LHCP), and 13.56% at 11.28GHz（RHCP）. Finally, the antenna was fabricated and tested. The measured results roughly agree with the simulated ones.
Keywords Dual bands Dual circular polarizations Microstrip antennas Sequential rotation technique
目 次
1 绪论 1
1.1 研究背景及意义 1
1.3 论文内容安排 2
2 微带天线基本理论 及圆极化技术 2
2.1 微带天线基本理论 2
2.2 微带天线的圆极化技术 2
2.3 本章小结 2
3 双频线极化单元的研究与设计 2
3.1 微带天线双频技术 2
3.2 /4阻抗变换器分析 2
3.3 双频线极化单元的设计及仿真结果 2
3.4 本章小结 2
4 宽带双频双圆极化 阵列天线的研究与 设计 2
4.1 顺序旋转法的基本理论