Compact dual-band antenna for smart wristband application

Abstract

A compact dual-band antenna for smart wristbands was proposed. The proposed antenna consisted of a shorted hook-shaped radiating element and a rectangular ground plane. The antenna satisfied the -10 dB reflection coefficient bandwidth requirement in WLAN (2.45/5.8 GHz) bands both in free space and on the arm phantom. The gain of the proposed antenna was greater than 2 dBi at the center frequency of each operating band. To apply the proposed antenna to a practical smart wristband, a battery was considered in this letter. This antenna attained a multiband performance and size miniaturization compared with an existing antenna used for a commercially available smart wristband. In addition, the specific absorption rate (SAR) of the proposed antenna was analyzed. The experimental and simulated results of the proposed antenna were in good agreement. (c) 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:1462-1466, 2016