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Title Semi-Annular-Ring Slots Loading For Broadband Circularly Polarized Dr-Rectenna For Rf Energy Harvesting In Smart City Environment
ID_Doc 48297
Authors Surender D.; Ahsan Halimi M.; Khan T.; Talukdar F.A.; Kishk A.A.; Antar Y.M.M.; Rengarajan S.R.
Year 2022
Published AEU - International Journal of Electronics and Communications, 147
DOI http://dx.doi.org/10.1016/j.aeue.2022.154143
Abstract This article describes a circularly polarized (CP) broadband rectenna enabling sensing nodes connected in the smart cities to harvest radio frequency (RF) energy from the surrounding atmosphere. The proposed antenna efficiently operates at the 5.8 GHz Wi-Fi band (5.725–5.875 GHz) and the Wi-Fi 6E band (5.925–7.125). The antenna is a semi-cylindrical dielectric resonator antenna (S-CDRA) energized by a microstrip feed. Semi-annular slots are introduced around a Bow-tie slot from the ground plane side, enhancing the bandwidth, gain, and CP characteristics. The antenna provides an impedance bandwidth (BW) of 2.89 GHz (5.45–8.34 GHz) and offers CP characteristics with an axial ratio (AR) bandwidth of 680 MHz (5.67–6.35 GHz). The antenna maintains a minimum gain of 4.8 dBic. A series-pair configuration is proposed for an extended operating range and better conversion efficiency. The maximum simulated and measured conversion efficiencies are 66.6% and 65.2% at 11 dBm input power, respectively. © 2022 Elsevier GmbH
Author Keywords Annular slots; Bow-tie shaped slot; Broadband antenna; Circular polarization (CP); Dielectric resonator antenna (DRA); Rectenna; Semi-cylindrical DRA (semi-CDRA); Series-pair topology


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