Design of a circular-ring patch on-body antenna with shorting vias for WBAN application

Abstract

A circular-ring patch on-body antenna with a shorting via for WBAN application is proposed. The proposed circular-ring patch antenna has the maximum radiation direction along the body surface for on-body communication in the industrial, scientific, and medical (ISM) 2.45 GHz band. In order to achieve low profile, the proposed antenna used shorting vias to excite TM 31 mode at ISM 2.45 GHz. To enhance bandwidth performance, an annular ring with shorting via is closely located around a circular patch. Proposed antenna is fed by a via connected with a microstrip line. The overall dimension of proposed antenna is 60 mm × 65 mm × 3.15 mm.