A CPW-fed 2.45 GHz wearable antenna using conductive nanomaterials for on-body applications

A CPW-fed 2.45 GHz wearable monopole antenna using conductive nanomaterial with different conductivity for on-body applications is presented. The proposed antenna are consists of a rectangular patch with improved ground-plane structures using graphene and carbon nanotubes (CNTs) on flexible polydimethysiloxane (PDMS) substrate. The performance characteristic of proposed is characterized and compared with the reference antenna using copper, conventional conductive material for antenna. A good agreement on characteristic between proposed and reference antenna where 18% bandwidth improvement is observed on the proposed design. Meanwhile, significant improvement on antenna gain is observed while integrating graphene on antenna patch and ground. Significant bandwidth improvement is observed when improving the ground structure by introducing horizontal slit cutting and vertical stub. The antenna reflection coefficient characteristic is degrade near to the -10 dB is observed when applied on the voxel human model around upper arm area.