The effects of straight-pin type earring worn on the head on SAR at 2.4 GHz and 5.8 GHz

This paper presents the effect of metallic items on the antenna performance and SAR at 2.4 GHz and 5.8 GHz. The simulations were performed by means of CST Microwave Studio. The patch antenna was used as the radiating source while the metallic items were modeled as λ/4 and λ/2 straight pin-type earrings respectively. The results have shown that the head has shifted the antenna resonant frequencies at both frequencies investigated. This study has also indicated that the additional metallic item in close proximity to the head has an additional effect on antenna resonance, albeit quite a small one. However, the straight-pin type earrings have significantly increases the amount of energy absorbed in the human head at both frequencies tested.