WearableTriple-band Dual-mode Cross-shaped Button Antenna for WLAN Applications in 5G Technology

A novel wearable button antenna is proposed for the WLAN applications in 5G technology. The antenna is a button shape Roger substrate (a: 25mm) using a radiator on the top side of a disc, which enhances the users' comfort and makes it a small size up to date in the literature. Besides, the button is placed on the top side of substrates (Roger, Denim-black) and a conductive ground (copper). Moreover, a superstrate substrate (felt) is used on the top side of a radiator. The main characteristic is showed in three types of radiation patterns, a monopole type in the 2.4538-2.587 GHz for On-body and a broadside in the 5.038-6.03 GHz for off-body communications. Next, the high performance is obtained concerning the gain, bandwidth, and radiation patterns during On-Off body communication, simultaneously. Besides, the lowest specific absorption rate (SAR) is obtained in different bands. Simulated and measurement results are found well. Finally, the effect of the human body is validated using the human hand (hantenna) as an antenna.