應用屏蔽技術增加行動通訊效能與降低手機對於人體頭部特定吸收率之研究

Applications of Shielding Techniques to Enhance the Performance of Mobile Communications and Reduce SAR in Human Head

王靜松(Ching-Sung Wang)

指導教授 ： 周錫增

元智大學/工程學院/電機工程學系/碩士(2003年)

摘要

本篇論文主要是在探討如何使用屏蔽技術來提昇行動通訊之效能，並且有效降低人體頭部特定吸收率(SAR)。針對基地台天線，主要是利用阻抗性反射板，將基地台天線之sidelobe反射至mainbeam之方向，因為藉由此種屏蔽方法，可有效降低相鄰sector間overlapping之現象，以降低訊號干擾量，進而提昇通訊品質及增加系統的容量。
　　另一方面則是針對手機，吾人利用導磁薄板之屏蔽技術，除了可有效降低其天線產生之輻射電磁場對於人體頭部特定吸收率，同時不會影響天線本身應有之效能和特性，並且手機美好之外觀也不會因為屏蔽技術之設計而有太大變化。

關鍵字

特定吸收率

並列摘要

Applications of shielding techniques are proposed to enhance the antenna performance of mobile communications. The shielding structures for the base station antennas are based on an implementation of resistive plates that tend to reflect the antenna radiation in the side lobes to main beam region, and hence optimize the overlapping coverage between sectors. On the other hand, magnetic materials are employed to design the shielding structures for handset antennas and shells in order to provide good shielding effectiveness for magnetic near fields that were shown to be the major cause of SAR in humane head. Our studies show that with this shielding application the antenna efficiency can be raised while, in the mean time, reducing the SAR induction.

並列關鍵字

SAR

參考文獻

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