An omnidirectional and low-VSWR antenna for ultra-wideband wireless systems

Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573) Pub Date : 2002-11-07 DOI:10.1109/RAWCON.2002.1030138

T. Taniguchi, T. Kobayashi

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引用次数: 42

Abstract

This paper proposes an omnidirectional-in-azimuth, low voltage-standing-wave-ratio (VSWR), and easy-to-construct antenna for ultra-wideband (UWB) systems. Most wideband antennas do not simultaneously meet omnidirectional and low-VSWR requirements, essential for applications such as UWB channel sounding. The proposed antenna consists of a circular ground plane and a teardrop that is defined as a combination of a finite cone and a sphere to be inscribed inside the cone at lite cone base. This antenna can be considered either as a rounded finite monocone antenna or as a simplified volcano smoke antenna. Assuming 50-/spl Omega/ excitation, the optimum half-cone angle is 48/spl deg/ which gives the lowest maximum VSWR between 2 and 10 GHz. A prototype antenna was constructed and its VSWR and radiation characteristics were measured. The proposed antenna shows lower VSWR than a finite monocone of the equivalent size across most of the bandwidth. There was a good correlation between the measured and the calculated radiation patterns observed.

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一种用于超宽带无线系统的全向低驻波比天线

提出了一种全方位、低电压驻波比、结构简单的超宽带天线。大多数宽带天线不能同时满足全向和低vswr要求，这对于UWB信道探测等应用至关重要。所提出的天线由一个圆形地平面和一个泪滴组成，泪滴被定义为一个有限锥和一个球体的组合，该球体将在生命锥的底部嵌入锥内。这种天线既可以看作是圆形有限单锥天线，也可以看作是简化的火山烟雾天线。假设50-/spl ω /激励，最佳半锥角为48/spl°/，在2至10 GHz之间的最大驻波比最低。搭建了天线样机，测量了天线的驻波比和辐射特性。所提出的天线在大部分带宽上比同等尺寸的有限单锥天线显示出更低的驻波比。在观测到的测量和计算的辐射模式之间有很好的相关性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573)

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