文档介绍：摘要
摘要
近年来,新兴的超宽带(Ultra-Wideband)高速室内无线通信技术是利用时域极
短脉冲信号进行无线通信的,它具有小范围和超强的无线设备连接能力,而且拥有
高性能、低功耗和低成本无线数据通信能力,成为目前短距离高速无线通信系统实
现的有力竞争方案之一,该技术固有的特点及其特定的应用场合决定了超宽带天线
在电性能和物理特性上均有别于传统的窄带和宽带天线。因此,在这一背景下,本
文研究了应用于短距离无线通信系统中的超宽带天线。
本文首先介绍了超宽带技术和超宽带天线的发展近况,给出了天线的时域辐射
特性,并讨论了天线的基本参数以及超宽带系统对天线的主要技术要求。之后,我
们重点介绍了超宽带单极子天线的设计计算方法和工作原理,并针对基本结构的不
足,进行了优化改进和软件的数值仿真。其次,针对上述平面单极子天线的体积尺
寸过大的缺点,我们对具有共面结构的微带超宽带天线进行了研究设计,给出了采
用微带耦合馈电和共面波导馈电的两种超宽带天线。最后,针对目前超宽带天线的
工作频谱非常宽阔,易于受到临近频段的干扰,我们结合缝隙加载技术实现了能够
滤除一重和双重干扰波段的小型化微带式超宽带天线,研究了缝隙加载过程中对天
线性能的影响因素。它们具有尺寸小、结构简单、易于与 PCB 电路集成等优点,非
常适用于应用在短距离无线通信设备。设计结果验证了这两种天线结构用来实现超
宽带天线的合理性和有效性。
关键词:超宽带天线带阻缝隙加载共面波导微带耦合馈电
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安徽大学硕士论文:应用于短距离无线通信系统中的超宽带天线的研究与设计
ABSTRACT
Nowadays, the emerging ultra-wideband (UWB) technology for high-speed indoor
munication is the one that adopts extremely short pulse in time domain.
With excellent performance, low power consumption and low cost, UWB has e
one of the petitive technology for high date-rate indoor works in the
future. Considering the inherent characteristics of technology and practical application
environment, UWB systems require the antennas with more rigorous electrical and
physical performances than those of traditional narrow-band and wideband antennas.
Hence, on the background, the ultra-wideband antennas for short range wireless
communication applications are studied in this paper.
In this paper, the state of the art of UWB technology and UWB antenna is firstly
introduced, and then antenna radiation characteristic in the time-domain is also outlined.
Besides, some basic antenna parameters have been reviewed as well as the UWB
requirements. After that, we focus on the designs and calculations of the ultra-wideband
monopole antennas and its working principles, and make an improvement on the basic
structures and numerical simulation by the software HFSS. Then, in order to reduce the
bulky size of the planar monopole antennas, we propose the printed microst