SAR Investigation of Array Antennas for Mobile Handsets
SAR Investigation of Array Antennas for Mobile Handsets
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DOI：
10.1093/ietcom/e90-b.6.1354
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发表时间：
2007-06
期刊：
影响因子：
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通讯作者：
Qiang Chen;Yasunori Komukai;K. Sawaya
中科院分区：
文献类型：
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作者：
Qiang Chen;Yasunori Komukai;K. Sawaya
两个元素的阵列天线的峰值SAR值的移动的手机在附近的一个球形幻影的人的头部的数值评估作为之间的距离的函数的阵列天线和头部的幻影时，两个元素的两个元素的阵列天线是同相电压馈电或反相电压馈电。研究发现，SAR最坏情况与阵元相位差之间的关系强烈依赖于距离。当头部体模部分位于阵列天线无功近场区时，虽然同相馈电SAR值略小于反相馈电SAR值，但SAR值实际上与相位差无关，但当头部完全位于无功近场区时，同相馈电SAR值大于反相馈电SAR值。
The peak SAR values of two-element array antennas for mobile handsets in the vicinity of a spherical phantom of a human head are evaluated numerically as a function of the distance between the array antenna and the head phantom when the two elements of a two-element array antenna are either co-phase voltage-fed or reverse-phase voltage-fed. It is found that relation between the worst case of the SAR and the phase difference of array elements strongly depends on the distance. When part of the head phantom is located in the reactive near-field region of the array antenna, although the co-phase feed SAR value is slightly smaller than the reverse-phase feed SAR value, the SAR value is practically independent of the phase difference, but when the head is completely outside the reactive near-field region, the co-phase feed SAR value is larger than the reverse-phase feed SAR value.