摘要波导缝隙天线阵结构简便，性能稳定,在通信系统中应用广泛。对于空间受限的通信，通常需要天线能够传输并接收具有两个不同极化状态的信号。本文的工作即围绕双极化波导缝隙天线阵列设计展开。
本文首先论述了波导缝隙天线的基本理论，并利用HFSS软件对波导宽壁上纵缝单元导纳特性和辐射特性进行参数化研究。
为利用波导宽壁上纵缝单元实现双极化，本文利用耦合缝-空腔-辐射缝的转换结构，设计了45度极化扭转单元。通过参数化仿真研究，实现了给定谐振电导要求的辐射单元优化设计。利用优化设计的45度极化扭转单元，实现 单元线阵的设计，仿真得到最大增益为16dB,旁瓣电平小于20dB，均达到设计要求。21406
在此基础上，进一步提出双极化波导缝隙阵的设计方案。
关键词 波导缝隙阵 双极化 45度极化扭转 HFSS软件
毕业论文设计说明书（论文）外文摘要
Title The design of 45-degree polarization slotted waveguide antenna
Abstract
Waveguide slot antenna array has been widely used in communication systems due to its simple structure, stable performance. In space-constrained communications, an antenna usually need to be capable of transmitting and receiving signals with two different polarization. Therefore, design of dual-polarized slotted waveguide antenna array is investigated in this thesis.
Firstly, the radiating theory of the waveguide slot element is discussed. By utilizing HFSS software, parametric simulations are conducted to investigate admittance property and radiation characteristic for a longitude slot cut in the broad wall of the waveguide.
Secondly, to realize the dual-polarized radiation for a longitude slot cut in the broad wall, a transition which consists of a coupling slot, cavity and radiated slot is utilized to achieve a 45 degree polarization twist. For a prescribed resonant conductance, parametric optimization is performed for a 45 polarization element. Then a 1-by-10 linear array has been designed. Simulated gain of 16dB and sidelobe of less -20dB have been obtained, which demonstrate the validity of this design.
Finally, a design scheme is further proposed for a dual-polarized slotted waveguide antenna array.
Keywords slotted waveguide antenna array dual-polarization 45 degree polarization twist HFSS software
目 次
1 绪论 1
1.1 研究背景及意义 1
1.2 双极化波导缝隙阵 1
1.3 本文的主要内容 2
2 波导缝隙天线单元 3
2.1 矩形波导尺寸的确定 3
2.2 矩形波导主模的场结构 4
2.3 矩形波导中开缝的形式以及等效电路 5
2.4 宽边纵缝辐射单元的参数化仿真研究 7
2.5 小结 10
3 45度极化扭转单元的设计 11
3.1 45度极化扭转单元工作原理 11
3.2 45度极化扭转单元参数化仿真 12
3.2.1 腔体尺寸变化的影响 13
3.2.2 辐射缝长度变化的影响 14
3.2.3 耦合缝长度和偏移量变化的影响 15
3.2.4 辐射单元尺寸的确定 15
3.3 45度极化扭转单元辐射方向图分析 15 HFSS45度极化角波导缝隙天线设计+文献综述:http://www.751com.cn/tongxin/lunwen_13594.html