Abstract
This paper reports the design of a planar circular monopole Ultra-wideband (UWB) antenna for RF energy harvesting. It achieves S 11 ≤ -10dB in 1.76GHz-12.23GHz, which coexists with RF bands like GSM1800 (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 41×30×1.6mm3. It shows 97% as maximum radiation efficiency at 1.8GHz and 4.3dBi as highest peak gain at 9.22GHz. The comparison plots of S 11 for optimized ground with different lengths are also presented. This structure is modeled using HFSS solver. The fabricated structure is validated reasonably.
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