How to reduce the influences of cell phones electromagnetic radiation on human bodies, while promoting radio frequency circuit and wireless preferences?

如何实现在提升射频电路和天线的性能的同时，降低手机电磁辐射对人的影响？

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Radio is the wireless transmission of signals through free space by electromagnetic radiation of a frequency significantly below that of visible light.

一种在可见光下以一定频率在空间穿行的电磁无线信号，请注意是“可见光”，下面会提到这个概念。

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The Australian research focused on the thermal effects or specific absorption rate (SAR) of radio frequency radiation - a measure of its actual effects on brain tissue, whereas the earlier study simply looked at electromagnetic radiation levels.

BBC: Hands-free mobiles given safety boost