Could the antenna pattern be in energy instead of in power?

2009 IEEE International Workshop on Antenna Technology Pub Date : 2009-03-02 DOI:10.1109/IWAT.2009.4906981

D. Chang, Chao-Hsiang Liao, P. Hsu

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引用次数: 2

Abstract

In general, the limited antenna power patterns in frequency domain are used to describe the antenna performance. It is enough to describe the antenna performance in narrow band communication systems. However, the limited antenna power patterns in frequency domain are not enough for ultra wideband (UWB) antennas or arrays in communication systems. The energy pattern of antenna is the total response of power patterns in frequency domain. It will be easier to describe the energy pattern instead of power pattern for UWB antennas. In this paper, electromagnetic energy, electromagnetic power, energy pattern, energy gain, energy directivity and energy efficiency will be discussed. In order to verify the theory of antenna pattern in energy, Yagi Uda antenna, marrow band multibeam smart antenna, UWB bow-tie slot antenna, UWB comb taper slot antenna, and UWB antenna arrays with different element spacing are studied and measured by the impulse time domain system. The energy pattern is quite similar to that of power pattern for narrow band antennas. The grating lobes of UWB antenna array will not occur at the energy pattern even if the element spacing of array is larger than one wavelength.

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天线的模式会是能量而不是功率吗?

一般情况下，天线在频域的有限功率图被用来描述天线的性能。对窄带通信系统中天线性能的描述就足够了。然而，对于通信系统中的超宽带(UWB)天线或阵列来说，有限的频域天线功率模式是不够的。天线的能量方向图是功率方向图在频域的总响应。对于超宽带天线来说，描述能量方向图比描述功率方向图更容易。本文将讨论电磁能量、电磁功率、能量模式、能量增益、能量指向性和能量效率。为了验证能量方向图理论，利用脉冲时域系统对八木田天线、骨髓波段多波束智能天线、UWB领结槽天线、UWB梳状锥槽天线以及不同单元间距的UWB天线阵列进行了研究和测量。窄带天线的能量图与功率图非常相似。在超宽带天线阵中，即使阵元间距大于一个波长，在能量方向图上也不会出现光栅瓣。

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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2009 IEEE International Workshop on Antenna Technology

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