Design and Fabrication of a Plastic-Free Antenna on a Sustainable Chitosan Substrate

The majority of wearable and flexible 5G 6G devices are based on plastic substrates, that harmful to the environment. Therefore, development sustainable plastic-free radio frequency (RF) becomes a crucial issue. In this regard, we present fully biocompatible Planar Inverted-F Antenna (PIFA), fabricated $55 ~\mu \text{m}$ -thick chitosan substrate. Chitosan has relative dielectric constant 5. This antenna is working at 4.5 GHz in sub-6 band spectrum. It very compact footprint notation="LaTeX">$14\times23$ mm2 Specific Absorption Rate (SAR) 0.41 W/kg. prototype been using an innovative fabrication protocol. A good agreement between numerical experimental results obtained. measured realized gain equal 1 dBi resonant frequency. Our demonstrate suitability as substrate for antennas paves way Internet Healthcare Things (IoHT) applications.