A simple wideband electromagnetically fed circular polarized antenna for energy harvesting

Self Cite

A compact broadband ambient RF energy harvester operating from 1800 MHz up to 2.5 GHz is proposed in this paper. This work is motivated by the huge amount of free and continuously available RF energy in the surroundings that can be utilized into useable energy. Harvest performance is investigated using two antennas in this work, a circular polarized and an array antenna. Due to low ambient power densities, a multistage rectifier is utilized to improve the output dc voltage of the proposed system. Measurements indicate the system is capable of harvesting up to 1.8 Vdc output from nondedicated ambient RF energy sources in an urban area, which is significant in the absence of other energy sources.

Section: Array Antennamentioning

confidence: 96%

Section: Antenna Design and Measurementmentioning

confidence: 99%

“…Both simulated and measured S 11 and AR showed a good agreement as can be seen in Figure . Details of the antenna is summarized in Table and can be found in a study …”

Section: Antenna Design and Measurementmentioning

confidence: 99%

“…Simulated and measured S11 and axial ratio of circular polarized antenna [Color figure can be viewed at wileyonlinelibrary.com]…”

Section: Antenna Design and Measurementmentioning

confidence: 99%

Section: Antenna Design and Measurementmentioning

confidence: 99%

See 3 more Smart Citations

A compact dual‐band rectenna for ambient RF energy harvesting

Adam

Yasin

Rahim

et al. 2018

Self Cite

A coplanar waveguide fed tilted fractal inspired slot antenna for wideband circular polarization

Saraswat

Harish

2019

In this article, a coplanar waveguide (CPW) fed 45 tilted fractal inspired slot antenna to achieve wideband circular polarization is presented. A fractal-square slot is etched from the ground plane and rotated by 45 . The fractal slot is excited by the CPW fed monopole antenna. To achieve wideband circular polarization, asymmetric arm length of the fractal slot is used. The proposed antenna is fabricated and tested. The measured impedance bandwidth (|S11| < −10 dB) is 22.5% (3.6-4.57 GHz) for Band-1 and 63.5% (5.1-10.1 GHz) for Band-2, and measured 3 dB axial ratio bandwidth is 34.7% (6.37-9.05 GHz). Experimental results show that the proposed antenna generates right-hand circular polarization in the +Z direction. Left-hand circular polarization can be achieved by tilting the fractal slot by −45 . K E Y W O R D S axial ratio, circular polarization, CPW fed monopole, fractal slot antenna

A wide‐band antenna with dual open rings resonator for RF energy harvesting

Zeng

Ding

et al. 2022

In this letter, a wide‐band antenna with dual open rings resonator (DORR) is presented for ambient radio frequency (RF) energy harvesting applications. The proposed antenna is designed to harvest RF energy at DCS1800, UMTS/LTE, and Wi‐Fi bands (1.7–2.65 GHz). The DORR produces a strong coupling effect and leads to more current paths, thus contributing to a wider bandwidth. The measured bandwidth is from 1.68 to 2.80 GHz with 50% fractional bandwidth. The measured gains are 3.5, 5, and 5 dBi at 1.83 GHz (DCS1800), 2 GHz (UMTS/LTE), and 2.45 GHz (Wi‐Fi), respectively. Moreover, over 90% radiation efficiency and larger than 3 dBi gain are achieved for the operating bands. The antenna can be used for RF energy harvesting and various communication applications.