Effects of conducting spectacles on the SAR values inside the human head in a wireless communication environment

In this paper, effects of different conducting spectacles on SAR values are investigated for a person in a wireless communication environment at 1.8 GHz. Compared to the case with no spectacles, the largest SAR_1g is almost 4 times larger when a pair of 38 mm times 50 mm spectacles is in use for the VP incident wave. The 1g-averaged peak SAR inside the human head would actually exceed the threshold of the safety guideline if the incident wave power density is at the maximum permissible level [4]. Replacing the rectangular frame with a semi-rectangle one significantly reduces the SAR values because the vertical sides of the rectangular frame are cut in half to avoid the near-resonance and thus dramatically reduce the induced current.