Gain‐enhancement technique for wearable patch antenna using grounded metamaterial
Goutam Kumar Das, Subhadeep Basu, Bappaditya Mandal, Debasis Mitra, Robin Augustine, Monojit Mitra
Abstract
In this study, a metamaterial (MTM)‐based high‐gain compact‐wearable antenna for 2.45 GHz industrial, scientific and medical radio band application has been proposed. To achieve the flexibility of the antenna, textile material felt fabric has been chosen as the substrate of the antenna as well as MTM. An omega (Ω) like structure has been taken as MTM unit cell design. High value of permeability is utilised for the gain enhancement of the antenna. In addition, very low specific absorption rate (SAR) is obtained using the MTM which makes the proposed antenna suitable for the biomedical application. The proposed antenna has achieved about 3 dB gain enhancement along with SAR value of 0.405 W/kg (1 g tissue). The design has been optimised and the prototype with the optimised parameter has been fabricated and tested over the semi‐solid phantom and human body. Further, the proposed antenna over different type of textile material has also been validated.