Dual-band aperture-coupled rectenna for radio frequency energy harvesting

Abstract

The article presents a dual-band aperture-coupled rectenna for radio frequency (RF) energy harvesting at 2.45 and 5 GHz application. The rectenna consists of a dual-band π-shaped slot-etched aperture-coupled antenna, designed at the lower substrate of two FR4 substrate layers and a dual-band rectifier. The proposed antenna design also introduces the harmonic suppression of third-and higher order harmonics, ranging from 6 up to 10 GHz from the asymmetrical stubs design at the transmission feedline. The dual-band rectifier is designed to operate at 2.45 and 5 GHz frequency, successfully achieving high conversion efficiency at 68.83% and 49.90% with the optimum load resistor of value 700 Ω and 1.1 kΩ. The minimum DC voltage of 0.167 and 0.236 V with 0 dBm RF input power can be increased when greater RF power is being applied to it, increasing its flexibility to cater various low-power applications. K E Y W O R D Sdual-band aperture-coupled, dual-band rectifier, energy harvesting, rectenna

Investigation of a high-gain and broadband circularly polarized monopole antenna for RF energyharvesting application

“…To test its potential utility toward the RF-EH application, CRLH and LC-based GVDs are integrated with the antenna system. The LC-based GVD circuit (II) is more effective than CRLH-based GVD circuit (I) with V out of 2.1 V, η 0 as 61%, and V out of 1.7 V, η 0 as 43%, which proposes effective solution toward implementing rectifiers than those reported in [39,40,[48][49][50][51][52][53][54].…”

“…Here, the maximum attainable V out is 5.39 V (for I) and 5.4 V (for II), along with the maximum attainable η 0 as 56.28% (for I) and 73.82% (for II) are presented in Figs 6(b) and (c). By looking into the prospective of earlier RF-EH system designs [39,40,[48][49][50][51][52][53][54], the proposed antenna + rectifier design reported here, especially LC-based GVD circuit (II), depicts higher outcomes over the existing literatures, as shown in Table 4.…”

Optimization Design Methodology of Broadband or Multiband Antenna for Rf Energy Harvesting Applications

“…1(b), for delivering the received RF power at different frequency bands with a high PCE to the rectifier, the impedance matching network should be removed or simplified. Among antenna types, microstrip PA and SA are attractive designs offering several features for RFEH systems [14][15][16][17][18][19][20][21], including low profile, relatively easy design, the reduction in fabrication cost, and the miniaturization in physical dimensions of antennas in comparison with the wavelengths of the desired frequencies. Additional important features for antennas suitably used in RFEH applications are complex reflection coefficient and impedance frequency bands [22].…”

Monopole Antenna on Transparent Substrate and Rectifier for Energy Harvesting Applications in 5G

“…Nevertheless, improving the PCE is a major challenge while multiple diodes are used. In [10]- [14], multilayered aperture-coupled antennas are designed and incorporated with interdigital capacitor-based voltage doubler circuits for energy harvesting applications. Some remarkable features of harmonic suppression, dual-band operation etc.…”

“…Some remarkable features of harmonic suppression, dual-band operation etc. are introduced through those techniques in [10]- [14]. However, the amount of input power needed to obtain a high PCE with sufficient DC output voltage in those works is not compatible for remote sensors and devices since the ambient RF power normally available in the environment is not large in amount Antennas and rectifiers are incorporated together for energy harvesting applications [15] in frequencies other than ISM and WLAN bands.…”