A Gain Enhanced Dual-band Low SAR AMC-based MIMO Antenna for WBAN and WLAN Applications
Chengzhu Du, Ling-Ru Pei, Jie Zhang, Cheng-Xin Shi
Abstract
On the basis of artificial magnetic conductors (AMCs), a dual-band MIMO antenna is suggested. The proposed dual-band MIMO antenna is made up of two vertically positioned dipole antenna elements. A simple double circle-based AMC array is suggested to decrease radiation exposure to people while increasing forward gain. The antenna and the 3 3 AMC array are both printed on an FR4 substrate. The presented antenna with the AMC structure is manufactured and measured in order to confirm the simulated results in terms of S-parameters, radiation patterns, gain, and diversity parameters. The measured impedance bandwidths are 2.36-2.51 GHz and 5.03-6.12 GHz, covering . The fabricated antenna exhibits peak gains of 3.34 dBi at 2.45 GHz and 7.48 dBi at 5.8 GHz, respectively. The SAR value of body tissue can be reduced by around 99%, while the front-to-back ratio (FBR) is noticeably enhanced. The proposed AMC-supported MIMO antenna is appropriate for WBAN and WLAN applications.