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In this paper, we propose a novel method to mitigate the strong shadowing effect a nearby finger has on the antenna of a handheld communications device operating at 60 GHz, by introducing reflectors on the device. When the finger is located at the distance of 3 mm of the antenna, it causes strong shadowing and the far-field radiation attenuation behind the finger is 25–34 dB. In this paper, we show...
The World Radiocommunication Conference 2015 (WRC-15) identified a number of frequency bands between 24 and 86 GHz as candidate frequencies for future cellular networks. In this article, an extensive review of propagation characteristics and challenges related to the use of millimeter wave (mm-wave) in future wireless systems is presented. Reference to existing path-loss models including atmospheric...
In this paper, the loading effect and far-field pattern degradation caused by a finger is studied for antennas that can be considered for future user devices operating at 60 GHz. It is found that if a finger is located closer than 2 mm to the antenna, the antenna matching is severely detuned and the antenna radiation efficiency is degraded. For patch and dipole antennas, the far-field radiation behind...
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