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Tunable energy harvesting on UHF bands especially for GSM frequencies

Published online by Cambridge University Press:  10 December 2017

Mehmet Bakır*
Affiliation:
Faculty of Engineering and Architecture, Department of Computer Engineering, Bozok University, Yozgat, Turkey
Muharrem Karaaslan
Affiliation:
Department of Electrical and Electronics Engineering, Iskenderun Technical University, Iskenderun, Hatay 31200, Turkey
Olcay Altıntaş
Affiliation:
Department of Electrical and Electronics Engineering, Iskenderun Technical University, Iskenderun, Hatay 31200, Turkey
Mehmet Bagmancı
Affiliation:
Department of Electrical and Electronics Engineering, Iskenderun Technical University, Iskenderun, Hatay 31200, Turkey
Volkan Akdogan
Affiliation:
Faculty of Engineering and Architecture, Department of Electrical and Electronics Engineering, Bozok University, Yozgat, Turkey
Feyzullah Temurtaş
Affiliation:
Faculty of Engineering and Architecture, Department of Electrical and Electronics Engineering, Bozok University, Yozgat, Turkey
*
Corresponding author: M. Bakır Email: [email protected]

Abstract

Metamaterial-based energy harvesting structures operating at GSM 900 and GSM 1800 frequency bands have been proposed. The basic structure is composed of four nested U-shaped elements on the front and back side of the dielectric substrate, with a 180° relationship between the front and back resonators. As energy harvesting capability is directly related to the quality of absorption, with the aim being perfect absorption, there is an air gap to allow tuning of the resonance frequency, and copper plate follows the air gap to facilitate the perfect absorption of electromagnetic waves, which is verified by means of simulation and experimental tests. A set of simulations and experimental study were further carried out to demonstrate incident and polarization angle dependency, the effects of Schottky diodes, and the optimal orientation of the U-shapes. Spectrum analysis and DC voltage measurements across the HSMS 2860 Schottky diode are also presented to test the energy harvesting capability: the spectrum analyzer shows a 40 dBm difference, while 81.7 mV maximum DC voltage is observed at 900 MHz. The simulation and experimental study results, while displaying several differences, do suggest that the proposed design can be used for running low-energy consumption devices such as sensors and switches.

Type
Research Papers
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2017 

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References

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