Performance Analysis of a Compact Dual-Mode Antenna Operating at UWB and ISM Band for Wireless Medical Applications

Abstract

In this article, a new design of a flexible dual mode off/in-body antenna is proposed. The main objectives of this proposed antenna refer to its dual mode operating at 5.7808 GHz & 4.1968 GHz, miniaturized dimension, impressive return loss, higher bandwidth that makes it suitable for WBAN applications. The size of the antenna is 12 mm x 10 mm x 0.52 mm which is appropriate for implantable as well as off-body applications. The performance parameters were scrutinized for functioning the proposed antenna in Industrial, Scientific and Medical (ISM) (5.725 GHz-5.875 GHz) for Off-body communications and Ultra-Wideband (3.1 GHz-10.6 GHz) for implantable applications. A three layers of human phantom model is developed as simulation environment where the antenna is inserted inside the muscle for In-body operation. Biocompatibility test, flexibility and related performance measurements have been utilized using CST Microwave Studio software in both curved and planar states by following different types of dielectric property matching with human tissue model. Finally, Specific Absorption Rate (SAR) is assessed to check its feasibility and workability in wireless medical applications.