Fabry-Perot谐振腔天线的研究与设计

发布时间：2018-05-19 04:46

本文选题：Fabry-Perot谐振腔天线 + 宽带　；参考：《南京邮电大学》2017年硕士论文

【摘要】：伴随着通信领域技术的快速发展,人们对于高增益、小型化、低成本天线的需求也越来越大。法布里-珀罗(Fabry-Perot)谐振腔天线作为一类新型的平面透镜天线,凭借其自身高增益等优良特性引起了人们的广泛关注。本文主要的研究工作和成果包含了以下的三个方面:(1)本论文基础理论部分研究是基于Fabry-Perot谐振腔天线的工作的基本原理以及它的谐振工作条件。根据这些理论,设计了菱形缝隙FSS与EBG结构,使得谐振腔天线在8.5GHz和11.5GHz两个频段同时谐振工作,且天线的增益达到了16.2dBi。另外,该设计采用单同轴馈电简化了馈源,且天线的剖面高度也降低到了六分之一个工作波长。(2)本文提出了将口径耦合三角形圆极化微带天线作为馈源应用到Fabry-Perot谐振腔天线中去。结合对称结构的部分反射表面,该天线实现了高增益、圆极化的特性。通过优化设计,天线的最高增益提高到了18.7dBi,高于普通馈源下的天线增益。该设计中,天线的3dB增益带宽,-10dB阻抗带宽以及3dB轴比带宽均达到了3.5%以上。(3)由于谐振条件的制约,Fabry-Perot谐振腔天线的窄带特性一直是该天线的不足之处。本论文提出了一种新型的部分反射表面结构并应用到Fabry-Perot天线中去,成功实现了宽带特性。与传统的宽带Fabry-Perot天线相比,该设计只采用单谐振腔,天线的剖面高度得到了降低,且部分反射表面的反射特性也优于传统部分反射敷层。最后的测量结果与仿真结果近似,天线的最高增益可达到14.2dBi,-10d B阻抗带宽以及3d B增益带宽均达到了15%以上。
[Abstract]:With the rapid development of communication technology, the demand for high gain, miniaturization and low cost antennas is becoming more and more important. The Fabri Perot (Fabry-Perot) resonator antenna has attracted wide attention as a new type of planar lens antenna, with its excellent characteristics, such as self height gain. The results include the following three aspects: (1) the basic theory of this paper is based on the basic principle of the work of the Fabry-Perot resonator antenna and its resonant working conditions. According to these theories, the rhombus gap FSS and EBG structure are designed, which make the resonator antenna working at the same time in the two bands of 8.5GHz and 11.5GHz, and the antenna The gain is 16.2dBi.. The design uses a single coaxial feed to simplify the feed, and the profile height of the antenna is reduced to 1/6 working wavelengths. (2) the aperture coupled triangle circular polarized microstrip antenna is used as the feed to the antenna of the Fabry-Perot resonator. The antenna achieves high gain and circular polarization. By optimization, the maximum gain of the antenna is increased to 18.7dBi, higher than the antenna gain under the ordinary feed. In this design, the antenna's 3dB gain bandwidth, -10dB impedance bandwidth and 3dB axis ratio bandwidth are up to 3.5%. (3) the Fabry-Perot resonator is restricted by the resonance condition. The narrow band characteristic of the antenna has always been a shortcoming of the antenna. In this paper, a new type of partially reflective surface structure is proposed and applied to the Fabry-Perot antenna. The broadband characteristic is successfully realized. Compared with the traditional broadband Fabry-Perot antenna, the design only uses a single resonant cavity, and the profile height of the antenna is reduced, and partly inverse. The reflection characteristic of the surface is also superior to that of the traditional part of the reflection coating. The final measurement results are similar to the simulation results. The maximum gain of the antenna can reach 14.2dBi, the impedance bandwidth of the -10d B and the gain bandwidth of the 3D B are all up to 15%.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN820

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