On the Way to Green IoT Antennas: Compact Ultra-Thin CPW-Fed Monopole on Tencel

A compact ultra-thin eco-friendly antenna for IoT applications around 2.45GHz is presented based on both simulations and measurements. The use of a botanical textile named Tencel is explored and its suitability is evaluated through comparison of the novel antenna’s performance using Tencel versus a conventional RO3003 dielectric with similar relative dielectric permittivity. A comparison with recently published wearable antenna suitable for IoT at the same band is included to assess the relevance of this contribution, not only in terms of reducing the ecological footprint and skin comfort, but especially in terms of size reduction and radiation efficiency.