频率可重构天线设计

频率可重构天线设计(论文10000字)
摘要：现代通信系统发展至今，社会各个领域对天线的性能提出了更高的要求，需要天线具有小尺寸、多功能、频率可重构等特点，为了应用在需要频率可重构的相控阵雷达领域中，本文设计并仿真一个新颖的频率可重构宽带贴片的天线。辐射单元由通过四个变容二极管连接到一个环形微带环的圆形微带贴片，通过改变加载在变容二极管上的电压来改变其电容，实现天线频率能在1.5GHz到2.4GHz连续可调。得到该天线结构的仿真结果后，对天线结构作改进，分别改变环形贴片的半径以及缝隙宽度，观察天线工作频率并进行对比。
关键词：天线阵列，微带贴片，频率可重构，辐射单元

The Design Of Frequency Reconfigurable Antenna
Abstract:As the development of modern communication system,the need for the performance of antenna is much more diverse than before.Antenna has smaller scale,more function and reconfigure its frequency.For the need of phased array radar,A novel multifunctional frequency reconfigurable antennaemploying microstrip patches has been designed andexperimentally verified. Each radiating element consists of a circular microstrip patch connected to an annular microstripring via four varactor diodes.The capacitance of varactor diode is changed by the change of its voltage.The frequency of reconfigurable antennacan be tuned continuouslybetween 1.5 and 2.4 GHz.After the simulation results of the antenna structure are obtained, the radius of the circular patch and the width of the gap are changed respectively.The changes of the antenna operating frequency and other performance parameters in different combinations are observed and compared.
Key words:Antenna array,microstrip patch, frequency reconfigurable antenna,radiating element
 

目 录
一．绪论…………………………………………………………………1
1.1可重构天线的研究背景…………………………………………………………………1
1.2可重构天线的研究现状…………………………………………………………………1
1.3本文主要内容……………………………………………………………………………3
二．相关理论概论………………………………………………………5
2.1天线基本原理……………………………………………………………………………5
2.2天线性能参数……………………………………………………………………………6
2.3天线的常用分析方法……………………………………………………………………8
三．频率可重构天线的设计……………………………………………10
3.1频率可重构技术…………………………………………………………………………10
3.2天线的结构和参数………………………………………………………………………11
3.3天线的性能结果分析……………………………………………………………………12
四．基于第三章天线的改进……………………………………………20
    4.1动态改变天线结构参数的方法…………………………………………………………20
4.2改变缝隙宽度对天线性能的影响………………………………………………………20
    4.3改变环形贴片的半径对天线性能的影响………………………………………………24
五．总结…………………………………………………………………27
参考文献…………………………………………………………………29
致谢………………………………………………………………………31