An Efficient 2.4 GHz Differential Rectenna for Radio Frequency Energy Harvesting

Reed, Ryan; Pour, Fariborz Lohrabi; Ha, Dong Sam

doi:10.1109/mwscas48704.2020.9184600

Cited by 17 publications

(2 citation statements)

References 12 publications

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“…It enables the microcontroller to be powered by ambient RF energy. As the impedance of the rectifier can vary nonlinearly depending on the ambient power level, the source pull method is adopted for the input matching network, as described in [34]- [35]. The voltage doublers are connected after the T-branch matching structure using a power combiner.…”

Section: B Rectifier Designmentioning

confidence: 99%

An Energy Efficient RF Backscatter Modulator for IoT Applications

Reed

Pour

2021

2021 IEEE International Symposium on Circuits and Systems (ISCAS)

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This paper presents a compact backscatter modulator tag operating at 1.76 GHz. The modulator is composed of a series combination of a variable resistor and a varactor. These components modulate the backscatter signal by adjusting the input impedance or input reflection coefficient. A gallium nitride (GaN) on silicon carbide (SiC) high electron mobility transistor (HEMT) is adopted to implement the variable resistor. The modulator can support a variety of modulation schemes without increasing the size and design complexity. The tag can be continuously powered through ambient RF energy in the 2.45 GHz frequency band. A differential rectifier harvests RF energy to power a microcontroller eliminating the need for a battery. Experimental results show that the modulator can support 16-QAM with an error vector magnitude (EVM) of 1.73%. The measured RF to DC power conversion efficiency (PCE) of the energy harvester is 57.1% at a received power of 1.7 dBm.

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Section: B Rectifier Designmentioning

confidence: 99%

An Energy Efficient RF Backscatter Modulator for IoT Applications

Reed

Pour

2021

2021 IEEE International Symposium on Circuits and Systems (ISCAS)

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“…The final efficiency of this rectenna is 80% at 21 dBm input. Not only single-ended rectenna can be used, in [6], differential configuration has been employed. Two patch antennas form a balanced rectenna at 2.45 GHz, with 70% maximum efficiency at 5 dBm input.…”

Section: Introductionmentioning

confidence: 99%

Dual-band ambient energy harvesting systems based on metamaterials for self-powered indoorwireless sensor nodes

Ngo²,

Nguyễn

et al. 2021

Int. J. Microw. Wireless Technol.

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In this study, we present a comprehensive dual-band ambient radio-frequency (RF) energy harvesting system, consisting of rectenna and power management circuit, to harvest energy from 2.45 and 5.8 GHz Wi-Fi. The rectenna employs a metamaterial antenna based on a split-ring resonator, which possesses omni-directional radiation pattern at both frequencies and compact size (0.18λ × 0.25λ at 2.45 GHz). The dual-band rectifier yields the highest efficiency of 42% at 2.45 GHz and 1 dBm input power, 30% at 5.8 GHz and − 7 dBm input power. The maximum RF-DC efficiency for each band is 72% at − 5 dBm and 27% at − 2 dBm, respectively. The power management circuit, consisting of a storing capacitor and a boost converter, is integrated to produce a stable, sufficient output voltage. The energy harvesting system, with its comprehensiveness, is suitable for supplying low-power wireless sensor nodes for indoor applications.

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