A new measurement technique and experimental validations in determination SAR of N-antenna transmitters using scalar E-field probes
A new measurement technique and experimental validations in determination SAR of N-antenna transmitters using scalar E-field probes
复制标题
使用标量电场探头测定 N 天线发射机 SAR 的新测量技术和实验验证
DOI：
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发表时间：
2015
期刊：
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通讯作者：
Soichi Watanabe
中科院分区：
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作者：
Dinh Thanh Le;L. Hamada;Soichi Watanabe
本文提出了一种测量技术，以评估特定的吸收率（SAR）的多天线发射机，如移动的电话等。对一般N天线情况下的SAR公式进行了基本分析，并对三天线情况进行了实验验证。该技术的关键是测量SAR的一些不同的相对相位组合的天线和估计SAR的任何其他相对相位组合。为了确定双天线设备的最大SAR值，仅需要三次测量，而对于三天线情况，需要七次测量。所提出的技术适用于SAR测量系统使用标量电场探头，和实验验证表明，估计SAR和测量SAR是非常好的协议。
This paper presents a measurement technique to evaluate the Specific Absorption Rate (SAR) for multi-antenna transmitters such as a mobile phone or the like. Fundamental analysis of SAR formula for the general case of N antennas and experimental validations for the case of three antennas are presented. The key point of the proposed technique is to measure SAR for some different relative phase combinations of the antennas and estimate SAR for any other relative phase combinations. To determine the maximum SAR value of two-antenna devices, only three measurements are necessary while for three-antenna cases, seven measurements are required. The proposed technique suites well for SAR measurement systems using scalar electric field probes, and experimental validations show that estimated SARs and measured SARs are in very good agreement.