Abstract
In this article, the characteristics of four spiral-facet structures are studied for RF energy-harvesting (RFEH) applications for increasing the harvesting power from the surrounding atmosphere. A rectangular dielectric resonance antenna (RDRA) is selected and placed above an FR4-epoxy substrate. Metallic rectangular spirals are then placed on the dielectric resonator (DR) surface to create resonances with insensitive polarization characteristics. The proposed spirals help provide wideband/multiband characteristics at 4.85, 5.0, 5.5, 5.8, and 6.25 GHz that covers 5G 4.9, WLAN 5.0, WLAN 5.5, Wi-Fi 5.8, and Wi-Fi 6E bands, respectively. The minimum gain achieved is 5 dBi in all possible configurations. A broadband rectifier circuit (4.67-7.0 GHz) with a staircase multistage transmission line matching network (MN) covering all resonant frequencies in various facet-loaded antenna configurations is proposed for RF-to-dc conversion purposes. The rectifier's maximum power conversion efficiency (PCE) is achieved as 77.3% at a 13.5 dBm input power level, and the corresponding output voltage is 4.92 V.
Original language | English |
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Pages (from-to) | 1273-1284 |
Number of pages | 12 |
Journal | IEEE Transactions on Antennas and Propagation |
Volume | 71 |
Issue number | 2 |
DOIs | |
State | Published - 1 Feb 2023 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:© 1963-2012 IEEE.
Keywords
- Broadband rectifier
- circular polarization (CP)
- multiband
- power conversion efficiency (PCE)
- radio frequency energy harvesting (RFEH)
- spiral facet
ASJC Scopus subject areas
- Electrical and Electronic Engineering