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摘要随着人们对雷达天线抗干扰能力要求的提高，需要天线具备低副瓣，低交叉极化、小体积、便携带的特点。波导缝隙天线因其能够满足人们的需求而被广泛的应用。 本文通过以下几个方面对波导缝隙天线进行了设计研究： 1、对天线的基本理论概念进行了概要叙述，重点说明了波导缝隙天线的基本原理及分类。对比切比雪夫和泰勒分布的基本理论基础，给出了行波阵缝隙电导的计算方法及公式。 2、结合理论，利用 HFSS设计出一个60 缝的矩形波导窄边缝隙天线模型，并进行优化。 3、在对单脊波导的结构及特性进行的基础上，同时提出了单脊波导脊边双缝天线的设计方案，并进行了模型的设计仿真。通过仿真结果可以得到该设计通过减小天线的横截面积，使得天线的体积更小，更轻盈。 42582
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毕业论文关键字： 波导缝隙阵 单脊波导 脊边双缝 行波阵
Title Research on the Design of Ku-band Waveguide Dual-slot Antenna Array
Abstract With higher requirement of anti-jamming capability of radar, an antenna should keep the advantages of low sidelobe, low cross polarization, small volume, and being convenient to carry. For it can meet human's needs, waveguide slot antenna is now widely used. In this paper, waveguide slot antenna is designed and researched in the following aspects: Firstly, an overview of the basic conceptions of the antenna，espaically the classification and theory of antenna, is outlined. Based on the comparison of Chebyshev and Taylor methods of array synthesis, the calculation methods and formulas to extracting the resonant conductance of travelling-wave array are introducted. Secondly, according to the theory, a 60-slot array on waveguide narrow side wall is designed and simulated in the commercial software HFSS. Finally, a new slot antenna design that dual-slot antenna on the two ridges of single ridge waveguide is raised on the basis of the research of the structure and characteristics of ridge waveguide slot antenna. This design is simulated through electromagnetic simulation software. Simulation results show that this design can reduce the antenna profile height and weight to make the antenna smaller and lighter.
Keywords waveguide slot array, single ridge waveguide, ridge edge dual-slot travelling-wave array
目录
1绪论.1
1.1研究背景及意义1
1.2波导缝隙天线的研究发展状况1
1.3主要工作及章节安排.2
2波导缝隙天线的基本理论与设计方案4
2.1天线理论基础.4
2.2理想缝隙天线与巴比涅原理.6
2.3缝隙天线阵的分类..7
2.4阵列口径分布综合方法8
2.5矩形波导窄边缝隙天线阵列设计步骤.10
2.6章节总结.12
3Ku波段波导窄边缝隙天线阵列设计仿真.13
3.1波导窄边缝隙天线电导函数的提取..13
3.2波导缝隙天线的缝隙口径分布安排..16
3.3模型仿真与验证.20
3.4天线数据优化..21
3.5章节总结.22
4单脊波导脊边双缝天线的基本理论与设计方案.23
4.1单脊波导理论..23
4.2单脊波导截止波长的计算24
4.3单脊波导双缝天线阵列基本原理与设计步骤.25
4.4章节总结.26
5单脊波导脊边双缝天线阵模型设计及仿真.27
5.1波导脊边双缝天线阵列电导函数的提取27
5.2波导脊边双缝天线阵列的口径分布.29
5.3波导双缝天线阵列的仿真31
5.4章节总结.34