多频带与宽频带圆极化天线特性分析与设计研究

发布时间：2018-06-19 05:44

本文选题：多频带天线 + 宽频带天线　；参考：《电子科技大学》2017年硕士论文

【摘要】：近年来,随着无线通信技术的快速发展,人们对具有高性能的无线通信设备更加迫切地需求。一部无线通讯设备所整合的天线部件的性能是决定该设备综合性能好坏的关键因素之一。与此同时,无线通信设备的飞速发展也对大规模数据的传输速率提出了严苛的要求。具有圆极化辐射特性的宽频带与多频带天线正是可以满足高速率、大容量传输要求的新型天线。本论文在匹配了几种常用无线通信系统需求的基础上,结合圆极化天线具有信息传输的灵活性与抗极化失配的特点,对多频带圆极化天线和宽频带圆极化天线进行了深入地设计研究。本论文的主要工作内容及研究成果具体如下:首先,通过查阅国内外大量关于多频带与宽频带圆极化天线科研报告与文献综述,系统地介绍了本课题的研究背景,详细地总结了该领域的发展现状。比较全面地概括了本文所涉及到的微带天线,单极天线与圆极化天线的基本理论,为下文天线设计部分提供理论基础。然后,对多频带圆极化天线展开设计研究,设计了两个多频段圆极化天线,包括:(1)应用于北斗导航频段的双频微带天线,通过对方形辐射贴片四角分别开四个尺寸互异的圆弧形槽实现圆极化辐射,并利用叠层结构达到双频辐射特性。(2)应用于WLAN/WiMAX频段的三频单极天线,通过在辐射体上蚀刻出十字形槽与倒“L”形槽实现圆极化辐射,并通过改进接地板形状优化其圆极化轴比特性。最后,对宽频带圆极化天线展开设计研究,设计了三个宽频段圆极化天线,包括:(1)一种应用在导航频段的圆极化单极天线,该设计通过简单地改进接地板实现宽频带圆极化辐射特性;(2)一种应用在导航频段的宽频圆极化单极天线,并通过对接地板引入三角形开槽和对辐射体进行弯折设计达到小型化效果;(3)一种应用在WLAN/WiMAX频段的单极天线,利用改进的“C”形结构辐射体实现宽频带圆极化辐射特性。
[Abstract]:In recent years, with the rapid development of wireless communication technology, people have a more urgent need for wireless communication devices with high performance. The performance of an integrated antenna component of a wireless communication device is one of the key factors determining the comprehensive performance of the device. At the same time, the rapid development of wireless communication equipment has put forward strict requirements for the transmission rate of large-scale data. The broadband and multi-band antennas with circularly polarized radiation are new antennas which can meet the requirements of high speed and large capacity transmission. On the basis of matching the requirements of several commonly used wireless communication systems, this paper combines the characteristics of circular polarization antenna with the flexibility of information transmission and anti-polarization mismatch. The multiband circular polarization antenna and the wide band circular polarization antenna are deeply designed and studied. The main contents and research results of this thesis are as follows: firstly, by consulting a large number of domestic and foreign reports and literature review on multi-band and wide-band circular polarization antenna, the research background of this topic is introduced systematically. The present situation of this field is summarized in detail. The basic theories of microstrip antenna, monopole antenna and circular polarization antenna are summarized in this paper. Then, the design of multi-band circular polarization antenna is studied, and two multi-band circular polarization antennas are designed, including the dual-frequency microstrip antenna used in Beidou navigation frequency band. The circular polarized radiation is realized by opening four different sizes of circular arcs on the four corners of the square radiation patch, and using the laminated structure to achieve the dual-frequency radiation characteristics. (2) the three-frequency monopole antenna in WLAN / WiMAX band is used. The circular polarization radiation is realized by etching cross groove and inverted "L" groove on the radiator, and the circularly polarized axial ratio is optimized by improving the shape of the floor. Finally, the design of a wide band circularly polarized antenna is carried out, and three circularly polarized antennas are designed, including 1: 1) a circularly polarized monopole antenna which is used in navigation frequency band. In this design, a broadband circularly polarized monopole antenna used in navigation frequency band is realized by simply improving the floor connection. By introducing triangular grooves to the floor and bending the radiator to achieve a miniaturization effect, a monopole antenna applied in the WLAN / WiMAX band is proposed. The modified "C" structure radiator is used to realize the wide-band circularly polarized radiation characteristics.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN822

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