方向图可重构天线研究与设计
发布时间：2018-10-26 20:34
【摘要】：随着现代无线通信系统的发展,为了适应逐渐增长的语音、数据及互联网业务的需求,对无线通信系统在传输率等性能上的有了更高的要求。可重构天线的提出很好的解决了这一难题,它可以加载微波开关,通过控制微波开关的通断状态来改变天线表面电流的分布或者天线的长度等参数,从而实现天线的频率、极化和方向图的可重构特性。我们需要在一款天线上实现多种不同的功能,所以我们首先研究方向图可重构天线,进而再研究频率和方向图可重构天线。本文的主要工作内容如下:1.本文首先介绍了天线的基础知识以及微带天线的工作原理,探讨了可重构天线实现方法以及现如今为了实现混合可重构技术所遇到的问题。2.基于可重构天线的相关理论,设计了一款具有两种工作模式的应用于5.2GHz频段的对称型方向图可重构天线。在天线结构上采用了开槽技术,槽内加载微波开关。天线的中心工作频率为5.2GHz,回波损耗值达到了-43.6dB,阻抗带宽为2.3GHz,其相对带宽为47%,天线在两种模式下的最大增益为4.14dBi和4.06dBi,具有良好的增益特性。经实物加工后测得的结果与仿真结果基本吻合。说明本文所设计的天线达到了比较好的性能,天线满足对带宽的指标要求。3.设计了一款频率与方向图可重构天线,该天线为对称型结构,5个开关的“通断”状态决定天线的性能,采用微带线馈电方式。天线可以工作在9种模式下,中心频率分别为 2.0GHz、4.9GHz、5.1 GHz、8.6GHz、9.9GHz 和 10.1GHz,实现了天线的频率与方向图可重构特性。
[Abstract]:With the development of modern wireless communication system, in order to adapt to the increasing demand of voice, data and Internet services, the performance of wireless communication system in transmission rate has higher requirements. The proposed reconfigurable antenna solves this problem well. It can load the microwave switch, change the current distribution on the antenna surface or the length of the antenna by controlling the on-off state of the microwave switch, so as to realize the frequency of the antenna. Reconfigurable properties of polarization and pattern. We need to achieve many different functions on one antenna, so we first study the pattern reconfigurable antenna, and then we study the frequency and pattern reconfigurable antenna. The main work of this paper is as follows: 1. In this paper, the basic knowledge of antenna and the working principle of microstrip antenna are introduced, and the realization method of reconfigurable antenna and the problems encountered in the realization of hybrid reconfigurable technique are discussed. Based on the theory of reconfigurable antenna, a symmetrical pattern reconfigurable antenna with two working modes is designed for 5.2GHz frequency band. The slot technique is used in the antenna structure, and the microwave switch is loaded in the slot. The central operating frequency of the antenna is 5.2 GHz, the return loss is -43.6 dB, the impedance bandwidth is 2.3 GHz, and the relative bandwidth is 47. The maximum gain of the antenna in both modes is 4.14dBi and 4.06 dBi. the antenna has good gain characteristics. The measured results are in good agreement with the simulation results. It shows that the antenna designed in this paper achieves better performance, and the antenna meets the requirements of bandwidth. 3. A frequency and pattern reconfigurable antenna is designed. The antenna is symmetrical. The "on-off" state of five switches determines the performance of the antenna. The antenna is fed by microstrip line. The antenna can operate in nine modes with central frequencies of 2.0GHz 4.9GHz 5.1 GHz,8.6GHz,9.9GHz and 10.1GHz respectively. The reconfigurable characteristics of the antenna frequency and pattern are realized.
【学位授予单位】：山东科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN820
本文编号：2296873
[Abstract]:With the development of modern wireless communication system, in order to adapt to the increasing demand of voice, data and Internet services, the performance of wireless communication system in transmission rate has higher requirements. The proposed reconfigurable antenna solves this problem well. It can load the microwave switch, change the current distribution on the antenna surface or the length of the antenna by controlling the on-off state of the microwave switch, so as to realize the frequency of the antenna. Reconfigurable properties of polarization and pattern. We need to achieve many different functions on one antenna, so we first study the pattern reconfigurable antenna, and then we study the frequency and pattern reconfigurable antenna. The main work of this paper is as follows: 1. In this paper, the basic knowledge of antenna and the working principle of microstrip antenna are introduced, and the realization method of reconfigurable antenna and the problems encountered in the realization of hybrid reconfigurable technique are discussed. Based on the theory of reconfigurable antenna, a symmetrical pattern reconfigurable antenna with two working modes is designed for 5.2GHz frequency band. The slot technique is used in the antenna structure, and the microwave switch is loaded in the slot. The central operating frequency of the antenna is 5.2 GHz, the return loss is -43.6 dB, the impedance bandwidth is 2.3 GHz, and the relative bandwidth is 47. The maximum gain of the antenna in both modes is 4.14dBi and 4.06 dBi. the antenna has good gain characteristics. The measured results are in good agreement with the simulation results. It shows that the antenna designed in this paper achieves better performance, and the antenna meets the requirements of bandwidth. 3. A frequency and pattern reconfigurable antenna is designed. The antenna is symmetrical. The "on-off" state of five switches determines the performance of the antenna. The antenna is fed by microstrip line. The antenna can operate in nine modes with central frequencies of 2.0GHz 4.9GHz 5.1 GHz,8.6GHz,9.9GHz and 10.1GHz respectively. The reconfigurable characteristics of the antenna frequency and pattern are realized.
【学位授予单位】：山东科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN820
【参考文献】
相关期刊论文 前2条
1 胡越;杨雪霞;卢忠亮;郑国莘;;一种新型极化可重构微带天线[J];微波学报;2014年03期
2 肖绍球,王秉中;微带可重构天线的初步探讨[J];电波科学学报;2002年04期
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