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摘要众所周知，矩形波导与一般平面传输线相比有很多优点，但其立体结构很难在平面结构中应用。近年来，有学者提出了基片集成波导(SIW)的概念，使得这种困难迎刃而解。这种新型波导由加工在介质基片上的两排金属柱和介质基片构成，保留了传统矩形波导(RW)的很多优点，如高功率容量和高Q值等等，同时基片集成波导又兼具微带传输线的一些优点，如：低剖面，体积小，重量轻，价格低、易于和其他平面电路集成等。因此基片集成波导成为一种很好的设计平台，在微波毫米波有源及无源电路的设计中获得广泛应用。
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以往的电磁互补偶极子天线立体结构较大，不易平面集成和组成阵列，采用SIW馈电后可有效解决以上问题。本文设计的这款天线相对阻抗带宽为33.3%，中心频率处增益为7dB，半功率波瓣宽度达到了86°，整个工作频段内增益稳定。8792
关键词 矩形波导 基片集成波导 电磁互补偶极子 天线
毕业设计论文外文摘要
Title A Study Based on Substrate Integrated Waveguide-Fed Magneto-electric Dipole Antenna
Abstract
The rectangular waveguide structure, as we know, has advantages over other planar transmission lines for millimeter band applications, but its implementation in planar form seems to be difficult due to its 3D geometry. This difficulty was resolved a few years ago by the proposed substrate integrated waveguide (SIW). It is an artificial waveguide structure that is fabricated in planar substrate with periodic metallic cylinders, and preserves much of the properties of a conventional rectangular waveguide (RW). Substrate integrated waveguides have clear advantages over RWG including low cost, simple integration with planar devices, and a significant size reduction.
Previous magneto-electric dipole antenna has a large three-dimensional structure.So it is difficult to integrate with planar circuits and system or be composed of arrays.However SIW-fed can effectively solve the above problem. In this paper the design of this antenna has a relative impedance bandwidth of 33.3%. The gain of center frequency can reach 7dB. The half-power beam width can reach 86°. Over the operating frequency range
it has a stable gain.
Keywords Rectangular waveguide Substrate integrated waveguide（SIW）
Magneto-electric dipole Antenna目 次
1 绪论 1
1.1 引言 1
1.2 偶极子天线的研究现状 2
1.3 本课题方案的提出 3
1.4 本论文的主要工作及框架 4
2 电磁互补偶极子天线的基本理论以及实例 5
2.1 天线基础知识 5
2.2 电磁互补偶极子天线的基本原理和分析方法 6
2.2.1 偶极子天线 6
2.2.2 电磁互补偶极子原理 8
2.3 电磁互补偶极子天线应用实例 9
3 基片集成波导（SIW） 12
3.1 SIW结构出现的背景 12
3.2 SIW与常规矩形波导的等效 13
3.2.1 矩形波导 13
3.2.2 SIW与矩形波导对比 15
3.3 SIW传输特性 17
3.4 SIW结构与外部平面电路的过渡 19
4 基片集成波导馈电的电磁互补偶极子天线的整体结构 23
4.1 基本原理 23