Antenna study and design for ultra wideband communication applications
Antenna study and design for ultra wideband communication applications
复制标题
超宽带通信应用的天线研究和设计
DOI：
--
复制
发表时间：
2006
期刊：
影响因子：
--
通讯作者：
Jianxin Liang
中科院分区：
文献类型：
--
作者：
Jianxin Liang
自美国联邦通信委员会（FCC）发布7.5GHz（从3.1GHz到10.6GHz）带宽用于超宽带（UWB）无线通信以来，超宽带（UWB）作为一种高数据速率无线通信技术得到了迅速发展。与传统的无线通信系统一样，天线在超宽带系统中也起着至关重要的作用。然而，设计超宽带天线比设计窄带天线面临更多的挑战。一个合适的超宽带天线应该能够在FCC分配的超宽带上工作。同时，还需要在整个频率范围内具有令人满意的辐射特性。超宽带天线的另一个主要要求是具有良好的时域性能，即具有最小失真的良好脉冲响应。本文主要研究超宽带天线的设计与分析。研究工作涵盖了超宽带基本原理和天线理论。此外，我们亦对两种不同类型的超宽频天线进行了广泛的调查。本文研究的第一种天线是圆盘单极天线。垂直盘式单极子是在传统直线单极子的基础上发展而来，用盘式板代替线元件，大大提高了工作带宽。在了解垂直圆盘单极子的基础上，提出并研究了两种更紧凑的圆盘单极子，它们具有低轮廓和与印刷电路板兼容的特点。它们都是印刷的圆盘单极子，一个由微带线馈电，而另一个由共面波导（CPW）馈电。第二种类型的超宽带天线是椭圆/圆形槽天线，也可以通过微带线或CPW馈电。从频域和时域两个方面研究了超宽带圆盘单极天线和椭圆/圆槽i天线的性能和特性。为了更好地理解天线的工作原理，本文还对实现天线最佳工作的设计参数进行了分析。数值和实验表明，这两种类型的天线都适用于超宽带应用。
Since the release by the Federal Communications Commission (FCC) of a bandwidth of 7.5GHz (from 3.1GHz to 10.6GHz) for ultra wideband (UWB) wireless communications, UWB is rapidly advancing as a high data rate wireless communication technology. As is the case in conventional wireless communication systems, an antenna also plays a very crucial role in UWB systems. However, there are more challenges in designing a UWB antenna than a narrow band one. A suitable UWB antenna should be capable of operating over an ultra wide bandwidth as allocated by the FCC. At the same time, satisfactory radiation properties over the entire frequency range are also necessary. Another primary requirement of the UWB antenna is a good time domain performance, i.e. a good impulse response with minimal distortion. This thesis focuses on UWB antenna design and analysis. Studies have been undertaken covering the areas of UWB fundamentals and antenna theory. Extensive investigations were also carried out on two different types of UWB antennas. The first type of antenna studied in this thesis is circular disc monopole antenna. The vertical disc monopole originates from conventional straight wire monopole by replacing the wire element with a disc plate to enhance the operating bandwidth substantially. Based on the understanding of vertical disc monopole, two more compact versions featuring low-profile and compatibility to printed circuit board are proposed and studied. Both of them are printed circular disc monopoles, one fed by a micro-strip line, while the other fed by a co-planar waveguide (CPW). The second type of UWB antenna is elliptical/circular slot antenna, which can also be fed by either micro-strip line or CPW. The performances and characteristics of UWB disc monopole and elliptical/circular slot i antenna are investigated in both frequency domain and time domain. The design parameters for achieving optimal operation of the antennas are also analyzed extensively in order to understand the antenna operations. It has been demonstrated numerically and experimentally that both types of antennas are suitable for UWB applications.