Design Analysis of an Ultra-Wideband Antenna for RF Energy Harvesting in 1.71-12GHz

Abstract

This paper emphasizes on the design analysis of an octagon slotted planar circular Ultra-wideband monopole for RF energy harvesting in the band 1.71-12GHz. It coexists with many RF bands like GSM1800 (UL: 1.71-1.785GHz; DL: 1.805-1.88GHz), UMTS, LTE, Wi-Fi, ISM, UWB, WLAN, Wi-MAX and X-band. This antenna helps to capture the unused RF energy in these bands for harvesting purposes. The structure is tailored on the substrate (FR4) with size of mathbf{43} times mathbf{33} times mathbf{1.6} mathbf{mm}-{ mathbf{3}}. It achieves mathbf{S}-{ mathbf{11}} leq- mathbf{10dB} in 1.68GHz-12.09GHz. It shows 97% as maximum radiation efficiency at 1.71GHz and 5dBi as highest peak gain at 8.7GHz. Also, the analysis of optimized grounds with various slots in ground and patch is presented. This structure is modeled using HFSS solver. The fabricated structure is validated reasonably. © 2020 IEEE.