An analysis of the performance of a handset diversity antenna influenced by head, hand and shoulder effects at 900 MHz
An analysis of the performance of a handset diversity antenna influenced by head, hand and shoulder effects at 900 MHz
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900 MHz 下头、手、肩效应对手机分集天线性能影响的分析
DOI：
10.1109/25.933317
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
K. Monma
中科院分区：
文献类型：
--
作者：
K. Ogawa;T. Matsuyoshi;K. Monma
这项工作的目的是对由鞭状天线和内置平面倒F天线（PIFA）组成的分集天线进行线栅分析，以包括人类操作员的电磁效应，并评估各种入射无线电波环境下头到无线电分离的分集性能。调查还作出了在头部，手和肩膀上吸收的功率，由于阻抗失配的功率损耗，以及在非激励元件的耗散功率时，头到无线电分离被改变。从结果中，改变辐射效率的机制进行了解释。
The purpose of this work is to make a wire-grid analysis of a diversity antenna comprising a whip antenna and a built-in planar inverted F antenna (PIFA) to include the electromagnetic effects of a human operator and to evaluate the diversity performance with regard to the head-to-radio separation under various incident radio wave environments. Investigations are also made on the power absorbed in the head, hand and shoulder, on the power loss due to impedance mismatch, and on the dissipated power in a non-excited element when the head-to-radio separation is changed. From the results, a mechanism for changing radiation efficiency is explained.