Development of a rectenna with a siw cavity backed slot antenna and a Fabry-Pêrot antenna

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2015

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Bozulu, Efecan

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A rectenna is a term that is used for an antenna that is integrated with a microwave rectifier for the purpose of capturing microwave power and converting it to DC power. Rectennas are mostly employed for wireless power transmission via microwaves. In this thesis work a substrate integrated waveguide cavity backed (SIWCB) slot antenna and a Fabry-Pérot antenna is designed, manufactured and tested to be used as the receiving antenna of a rectenna system along with a microwave rectifier to be used as the rectifying part of this system. All system is designed to operate at 2.45 GHz. Microwave rectifier is designed to have a 56% RF to DC conversion efficiency. Microwave rectifier is realized by distributed elements and a microwave diode with using harmonic balance simulation. SIWCB slot antenna is selected in this design for its low profile, easy integration with microwave elements, low cost, ease of fabrication and high efficiency. Designed SIWCB slot antenna has microstrip to grounded coplanar waveguide transformation for its feeding. Designed antenna has a gain of 2.9 dBi and 10 dB bandwidth of 20 MHz. Fabry-Perot antenna is designed using a two layered frequency selective structure (FSS) of subwavelength units. This designed FSS is used for the formation of the Fabry-Pérot cavity. In this thesis work Fabry-Perot antenna is preferred for its high gain, low cost and ease of fabrication. A simple patch antenna is used as the primary radiating element. Designed Fabry- Pérot antenna exhibits a gain of 10.5 dBi with 10 dB bandwidth of 26 MHz. These developed elements are used for formation of a rectenna system whose power transmission efficiency is also measured in the laboratory environment. All simulation results are in good agreement with measured values for microwave rectifier, SIWCB slot antenna, FSS Fabry-Pérot antenna and rectenna system.

Subject Keywords

Slot antennas., Antennas (Electronics)., Fabry-Perot antennas., Strip transmission lines.

URI

http://etd.lib.metu.edu.tr/upload/12618945/index.pdf
https://hdl.handle.net/11511/24773

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

E. Bozulu, “Development of a rectenna with a siw cavity backed slot antenna and a Fabry-Pêrot antenna,” M.S. - Master of Science, Middle East Technical University, 2015.