3-D Inkjet Printed Ultra-Wideband Equi-Angular Spiral Antennas

In this paper, we report a flexible 1 to 8 GHz ultra-wideband equi-angular spiral antenna printed using a Fujifilm Dimatix DMP-2831 inkjet printer. The antenna is printed on a 50 μm-thick flexible DuPont Kapton® FPC polyimide film using silver nanoparticle ink. The antenna is measured using an EMSCAN near-field scanner. The measured data proves that the antenna operates over an ultra-wide frequency band from 1 to 8 GHz as designed with excellent axial ratio and radiation patterns across the band.