小型化手持终端与宽带宽波束圆极化天线研究

发布时间：2018-05-27 08:15

本文选题：小型化 + 北斗　；参考：《西安电子科技大学》2014年硕士论文

【摘要】：论文结合科研项目进行选题研究，主要研究工作分为两个部分，第一部分研究工作为研制了小型化手持终端天线的工程样机，达到了技术指标要求，天线样机已交付甲方单位使用，使用效果良好；第二部分研究工作为设计了宽带宽波束圆极化天线，达到了技术指标要求，为后续样机加工奠定了一定的技术基础。论文的主要研究内容为：一，小型化手持终端天线的工程样机研制针对小型化手持终端天线的技术指标要求，阐述了北斗与GPS卫星天线的发展历史和研究现状，指出了天线小型化与降低多天线工作耦合的设计难点，讨论了终端天线小型化与降低多天线耦合的设计方法。采用Ansoft HFSS仿真软件对小型化终端天线进行仿真分析与设计，仿真结果表明，天线在要求工作频带内，电压驻波比小于2；极化方式为圆极化；天线方向图在方位面为全向；俯仰面30°至90°增益大于-5dB。在此基础上研制了天线的实验样机，并对其电性能进行了测量。测量结果表明，所设计的小型化终端天线在频带要求范围内驻波特性良好，实现方位面全向辐射的指标要求。可见，文中研制的天线样机满足工程应用的需求。二，宽带宽波束圆极化天线的设计根据宽带宽波束圆极化天线的工程应用要求，指出了天线应同时具有宽频带、宽波束，圆极化特性的设计难点。在对传统口径耦合微带圆极化天线进行分析比较的基础上，，通过加载合适的馈电网络提高天线的辐射特性，增加锥台结构，采用T形排列的渐变H形缝隙耦合馈电结构，设计了一种双层贴片形式的口径耦合微带天线。采用Ansoft HFSS仿真软件对所设计的天线进行仿真分析，结果表明，天线在工作频段内阻抗特性与辐射特性有较好的一致性，其驻波系数小于2，轴比小于6dB，波束宽度优于指标要求，满足宽带宽波束圆极化天线的基本要求，可作为宽带圆极化阵列的备选方案，为后续研制样机奠定了一定的技术基础。
[Abstract]:The research work is divided into two parts. In the first part, the engineering prototype of miniature hand-held terminal antenna is developed, which meets the technical requirements. The antenna prototype has been delivered to Party A for use, and the effect is good. In the second part, the broadband wide-beam circular polarization antenna is designed, which meets the technical requirements and lays a certain technical foundation for the subsequent prototype processing. The main contents of this thesis are as follows: Development of engineering prototype for miniaturized hand-held terminal antenna According to the technical requirements of miniaturized hand-held terminal antenna, the development history and research status of Beidou and GPS satellite antenna are expounded, and the design difficulties of miniaturization of antenna and reduction of multi-antenna working coupling are pointed out. The design method of miniaturization of terminal antenna and reduction of multi-antenna coupling is discussed. The simulation analysis and design of miniaturized terminal antenna are carried out by using Ansoft HFSS simulation software. The simulation results show that the voltage standing wave ratio is less than 2, the polarization mode is circular polarization, the antenna pattern is omnidirectional in azimuth plane, the voltage standing wave ratio (VSWR) is less than 2, and the antenna pattern is omnidirectional in azimuth plane. The gain of pitch plane from 30 掳to 90 掳is greater than -5 dB. On this basis, the experimental prototype of antenna is developed and its electrical performance is measured. The measurement results show that the designed miniaturized terminal antenna has good standing wave characteristics in the range of frequency band requirements and achieves the requirements of azimuth omnidirectional radiation. It can be seen that the antenna prototype developed in this paper meets the requirements of engineering applications. Design of Wideband Wide-beam Circular polarization Antenna According to the requirement of engineering application of broadband wide-beam circular polarization antenna, it is pointed out that the antenna should have the characteristics of wide band, wide beam and circular polarization at the same time. Based on the analysis and comparison of the traditional aperture coupled microstrip circularly polarized antenna, the radiation characteristics of the antenna are improved by loading a suitable feed network, and the conical structure is added. An aperture coupled microstrip antenna with double layer patch is designed. The Ansoft HFSS simulation software is used to simulate and analyze the antenna designed. The results show that the impedance characteristics and radiation characteristics of the antenna are in good agreement in the working frequency band, the standing wave coefficient is less than 2, the axial ratio is less than 6 dB, and the beam width is better than the target requirement. It can be used as an alternative scheme for broadband circular polarization array, which can meet the basic requirements of wide-band wide-beam circular polarization antenna and lay a certain technical foundation for the subsequent development of prototype.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN821.1

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