Wideband antenna efficiency measurements
Wideband antenna efficiency measurements
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DOI：
10.1109/iwat.2010.5464803
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发表时间：
2010-03
期刊：
影响因子：
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通讯作者：
Y. Huang;Y. Lu;S. Boyes;H. Chattha;N. Khiabani
中科院分区：
文献类型：
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作者：
Y. Huang;Y. Lu;S. Boyes;H. Chattha;N. Khiabani
在过去10年左右的时间里，针对宽带高数据速率移动通信开发了许多宽带和超宽带天线。人们认识到如何对此类天线进行高效、准确的测量可能是一个具有挑战性的问题。在本文中，我们研究了迄今为止使用的天线效率测量技术，并确定了它们对于宽带测量的优点和缺点。结果表明，经典的惠勒帽方法最适合电小型天线，即使对于宽带天线测量，在成本和效率方面也具有许多有吸引力的特性，尽管新提出的混响室方法可能成为一种很好的替代方法。提出了一种“源搅拌”方法作为宽带天线效率测量的新方法，其主要优点是廉价、方便、高效。提供了实验和数值结果。结果表明，由于腔体缺陷造成的损失会给获得准确的结果带来严重的问题。如何消除腔体损耗的影响，提高该方法的测量精度是一个需要解决的问题。
Over the past 10 years or so, many broadband and ultra-wideband antennas have been developed for broadband high data rate mobile communications. It is realized how to make efficient and accurate measurements for such antennas could be a challenging issue. In this paper, we examine the antenna efficiency measurement techniques which have been used up to now, and identify their advantages and disadvantages for broadband measurements. It is shown that the classic Wheeler cap method, which is the best for electrically small antennas, has a lot of attractive features even for broadband antenna measurements in terms of the cost and efficiency although the newly proposed reverberation chamber method may become a good alternative method. A “source stirred” method is proposed as a new approach for the broadband antenna efficiency measurement and its major advantages are cheap, convenient, and efficient. Both the experimental and numerical results are provided. It is shown that the loss due to the imperfection of the cavity can cause a serious problem for obtaining an accurate result. How to eliminate the effects of the cavity loss and improve the measurement accuracy for this method is an issue to be resolved.