多种极化形式的短背射天线分析

Abstract

By the development of science and technology and the modernization of society, it is required a higher update requirements for communications equipment. The antenna, as an important part in it, is also faced with the touch requirements of high efficiency, miniaturization high-gain and so on. This paper is about short backfire antenna. It has the excellent characteristics of high gain, high efficiency, compact structure and cost performance.

Firstly, it is described the basic knowledge of short backfire antenna. Introducing typical short backfire antenna and summing its different improved structure. Secondly, research and design superior performance the linear polarized, dual-polarized and circularly polarized short backfire antenna.

Thesis design includes three types of short backfire antenna. First, it is designed two kinds of linearly polarized short backfire antennas, waveguide excitation and H-shaped slot excitation structure. Designing a SBA of simple structure with waveguide excitation, and then exploring the role of the different parts of the antenna performance, last designing a new type of high gain, broadband waveguide linearly polarized short backfire antenna. Devising short backfire antenna of H-shaped slot

patch to meet the requirements of wider bandwidth and low sidelobes. Second, designing two different characteristics of orthomode transducer, simple structure and high isolation, and then combining them with waveguide short backfire antenna to achieve two kinds of dual-polarized short backfire antenna with good performance. The design results prove that they are to meet the target requirements. Finally, it is designed that circularly polarized short backfire antenna of double H-shaped slot patch, method from the short backfire antenna of H-shaped slot patch linearly polarized.

Keyword: short backfire antenna waveguide excitation

H-shaped slot excitation Ortho-Mode Transducer(OMT)

摘要 (1)

Abstract (1)

目录 (1)

屋面拉条

第一章绪论 (1)

1.1 研究背景及意义 (1)

1.2 本文的内容安排 (2)

第二章短背射天线的基础知识概述 (3)

2.1 典型短背射天线 (3)

ace32.1.1 典型SBA结构形式 (3)

2.1.2 典型SBA基本思想与工作原理 (4)

2.2 短背射天线发展的结构形式 (6)

2.2.1 基本发展形式 (6)

2.2.2 局部发展形式 (7)

2.3 短背射天线分析方法 (9)

2.3.1 镜像法 (9)

2.3.2 孔径场分布法 (10)

2.3.3 表面电流法 (11)

2.3.4 等效反射面法 (11)

2.3.5 基于有限元法的Ansoft HFSS (12)

2.4 短背射天线的应用 (15)

2.4.1遥测天线 (15)

2.4.2军用卫星地面站天线 (16)包装内托

2.4.3飞行体天线 (17)

2.4.4 单脉冲跟踪天线 (17)

第三章线极化短背射天线 (19)

3.1 波导激励的线极化SBA (19)

3.1.1 SBA结构 (19)

3.1.2 仿真结果及分析 (20)

3.2 H缝隙贴片激励的线极化SBA (24)打火机设备

3.2.1 贴片激励SBA的研究现状 (24)

3.2.2 H缝隙贴片激励的线极化SBA的设计 (25)

3.2.3 H缝隙贴片激励的线极化SBA的设计原理分析 (29)

3.2.4 本结小结 (31)

第四章双极化短背射天线 (33)

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4.1 SBA馈源—正交模耦合器设计 (33)

4.1.1 口径天线实现双线极化的方式 (33)

4.1.2 OMT分类及工作原理简介 (34)

4.1.3 同轴探针馈电的膜片分支结构OMT设计 (38)

4.1.4 波导端口馈电的膜片分支结构OMT设计 (39)

4.1.5 OMT仿真结果 (42)

4.2 双极化短背射天线设计 (43)

4.2.1 未改进结构波导激励SBA与同轴探针结构OMT结合的双极化SBA (43)

4.2.2 改进结构波导激励SBA的双极化特性天线设计 (49)

第五章双H缝隙贴片激励的圆极化短背射天线 (55)

5.1 圆极化短背射天线简述 (55)

5.2双H缝隙贴片激励的圆极化短背射天线设计 (55)

5.3双H缝隙贴片激励的圆极化短背射天线分析 (59)

电磁炒灶

第六章结束语 (63)

致谢 (65)

参考文献 (67)

在读期间研究成果 (69)

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