天线是无线通信系统的重要组成部分。随着社会的不断进步，人们对无线通信系统提出了更高的要求，这也同时推动着天线技术向前发展。总体来说，宽频化和高频化是目前天线技术发展的两个重要方向。介质谐振器天线因不存在高频段导体损耗大的问题而受到越来越多的欢迎。本项目着眼于未来的实际应用系统，对具有巨大应用潜力的双层圆柱形介质谐振器天线展开深入研究，对其提出新的通用设计方法。本项目拟首次推导可计算全向双层圆柱形介质谐振器天线尺寸的工程公式。这些公式简单易算，可以使天线设计过程变得更加人性化。另外，本项目拟首次提出多槽馈电结构来激励全向宽带介质谐振器天线（包括线极化和圆极化版本），使用这种结构可以避免对介质钻孔，挖槽和加寄生单元，并且有利于天线与微波电路集成。

Antenna is an important part of wireless communication system. With the continuous progress of the society, people put forward higher requirements for the wireless communication system, which also pushes forward the development of antenna technology. In general, wideband and high frequency are two important directions in the development of antenna technology. The dielectric resonator antenna (DRA) is more and more popular because of the lack of conductor loss at high frequency. In this project, we focus on the practical application system in the future, and study the two-layer cylindrical DRA with great application potential. This project is the first time to derive the engineering formula for the calculation of the size of the two-layer cylindrical DRA. These formulas are simple and easy to calculate, which can make the design process more humanized. In addition, the project intends to put forward the slot-fed structure to excite the omnidirectional wideband DRA, including linear-polarized and circular-polarized versions. Using this structure can avoid the medium hole, trench and parasitical unit for DRA design, and is conducive to the integration of antenna and microwave circuit.