摘要：时代在飞速的发展，社会对于各种科学技术的要求也越来越高，尤其在通信系统方面，各种有线、无线、微波等频繁的出现在生产和生活中。应用的不断增加，也导致对通信系统的功能将更加期待。在本文中，我们将着重就微带天线进行讨论研究。

对于微带天线，为了更好地将微带天线应用到各个领域，学者们希望它能更加的小型化，同时，也希望它的结构能更加的简单、能够多频段工作。微带天线的优点有很多：剖面薄、重量轻、便于圆极化、双极化和易于集成等，正是因为它的这些优点，使得越来越多的人关注到它。在微带天线的研究过程中，很容易就会发现它的工作频带较窄，这也是众多研究者在研究微带天线上一直侧重的部分。近几十年，通过很多学者慢慢摸索出来了一个扩宽带宽的方法：添加L型探针。目前，这种方式已经依靠于其优良的性能应用到了现代移动通信系统中，并发挥了重要的作用。本次设计，针对L型探针馈电微带天线进行设计与分析。

本文先就微带天线的基础理论做了简单地介绍，然后在微带天线的基础上对L型探针天线的结构及原理进行了阐述，接着根据任务要求，通过理论计算以及查找资料完成天线的初始尺寸计算，再利用天线设计软件HFSS进行建模、变量设置、仿真，分析各个尺寸对天线模型的影响，找到天线模型的最优尺寸。最后设计出能满足任务书要求的L型探针馈电微带贴片天线：覆盖相应频段并实现圆极化。

关键字：微带天线；贴片；L型探针馈电；圆极化；仿真优化

Abstract：Time in the rapid development of society for a variety of science and technology requirements are also increasing, especially in the communications system, a variety of cable, wireless, microwave and other frequent appear in the production and life. The increasing use of the application also leads to a greater expectation of the functionality of the communication system. In this paper, we will focus on the  microstrip  antenna to discuss the study.

For microstrip antennas, in order to better apply microstrip antennas to various fields, scholars hope that it can be more miniaturization, but also hope that its structure can be more simple, multi-band work. Microstrip antenna has many advantages: thin section, light weight, easy to circular polarization, dual polarization and easy integration, it is because of its advantages, so there will be more and more people concerned about it. In the microstrip antenna research process, it is easy to find its work band is narrow, which is many researchers in the study of microstrip antenna has been focused on the part. In recent decades, through a lot of scholars slowly explored a way to widen the bandwidth: add L- type probe. At present, this approach has been relying on its excellent performance applied to the modern mobile communication system, and played an important role. This design, for the L-type probe feeding microstrip antenna research, analysis of its characteristics.

In this paper, the basic theory of microstrip antenna is briefly introduced. Then, the structure and principle of L-type probe antenna are described on the basis of microstrip antenna. Then, according to the task requirement, the antenna is completed by theoretical calculation and searching The initial size of the antenna model, the antenna  design software HFSS modeling, variable settings, simulation, analysis of the size of the antenna model on the impact of the antenna model to find the optimal size. Finally, I designed a L- type probe feed microstrip patch antenna which meet the requirements of the task book : cover the corresponding frequency band and achieve circular polarization.

Keywords: microstrip antenna; patch; L-type probe feed; circular polarization; simulation and optimization