差分双模介质谐振器天线特性分析及应用研究

项目名称： 差分双模介质谐振器天线特性分析及应用研究

项目编号： No.61501265

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 唐慧

作者单位： 南通大学

项目金额： 20万元

中文摘要： 介质谐振器天线、差分电路、双模谐振器技术在无线通信系统中有着各自明显的优势，三者的有机结合，可以开发出多种具有尺寸紧凑、结构简单、稳定性好、抗干扰能力强、交叉极化低和杂散响应少等优越性能的新型天线，这顺应无线通信系统前端的发展趋势。本项目将进行差分双模介质谐振器天线特性分析及应用研究。通过对介质谐振器进行微扰分离简并模或在谐振器模式正交方向再增加一个模式的方式，设计天线适用的双模介质谐振器。对提出的双模介质谐振器进行差模和共模激励下的建模与分析。探讨差分工作状态下介质谐振器的馈电方式，以能在谐振器中成功激励相应的工作模式，设计双极化、圆极化的新型差分双模介质谐振器天线，所设计的天线在杂散抑制、交叉极化抑制以及双极化隔离性能上远远优于对应的单端天线。结合尺寸减小、频率可控/可调等技术，完善差分双模介质谐振器天线的设计并推导相关公式。进行差分双模介质谐振器天线阵列设计的应用研究。

中文关键词： 介质谐振器天线；差分天线；双模谐振器；双极化；圆极化

英文摘要： Dielectric resonator antenna (DRA), differential circuit and dual-mode resonator technology have great advantages in wireless communication systems respectively. It will follow the tendency of the development in wireless communication to integrate all of them and design novel antennas with compact size, simple structure, high stability, strong anti-interference capacity, low cross polarization and pure stopband. This project aims at analyzing and designing differential dual-mode DRAs and their applications. A dual-mode dielectric resonator can be developed for designing antennas from bringing perturbation to a resonator with degenerate modes or from adding an orthogonal mode to the original mode. To model the resonators with differential feedings, the distribution of odd-mode and even-mode electromagnetic fields can be achieved. Based on the field distribution, suitable differential feeding methods will be chosen for the dielectric resonators to excite the operating modes successfully, and to be used in designing the differential dual-mode DRAs including those with dual-polarization and circular polarization. The designed differential dual-mode DRAs will have superior performance in harmonic suppression, cross-polarization suppression and isolation of antennas with dual-polarization than the according single-ended DRAs. To improve the performance of differential dual-mode DRAs and to perfect the design method, efforts in size reduction and frequency-controllability or frequency-tunablity will be utilized. And differential dual-mode DRA arrays will be designed as the application.

英文关键词： dielectric resonator antenna;differential antenna;dual-mode resonator;dual-polarization;circular polarization