Efficient feeding geometries for rectenna design at 2.45 GHz

• Published in: Electronics letters Vol. 53; no. 24; pp. 1585 - 1587
• Main Authors: Ahmed, S, Zakaria, Z, Husain, M.N, Ibrahim, I.M, Alhegazi, A
• Format: Journal Article
• Language: English
• Published: The Institution of Engineering and Technology 23.11.2017
• Subjects: ac signals; antenna feeds; circular polarisation; dc voltage; efficiency 75.043 percent; efficient feeding geometries; electromagnetic wave polarisation; frequency 2.45 GHz; ground plane; harmonic rejection properties; harmonics suppression; microwave power transmission; microwave power transmission applications; Microwave technology; open stub matching network; radial stub; rectenna design; rectennas; right triangular slot; second harmonics suppression; third harmonics suppression; two layers low cost FR‐4 substrates; UHF antennas; voltage doubler rectifier; electromagnetic wave polarisation; dc voltage; efficiency 75.043 percent; third harmonics suppression; ac signals; second harmonics suppression; open stub matching network; rectenna design; radial stub; frequency 2.45 GHz; microwave power transmission; efficient feeding geometries; right triangular slot; UHF antennas; microwave power transmission applications; two layers low cost FR-4 substrates; antenna feeds; ground plane; rectennas; harmonic rejection properties; circular polarisation; voltage doubler rectifier; harmonics suppression
• ISSN: 0013-5194; 1350-911X; 1350-911X
• DOI: 10.1049/el.2017.2657

Efficient feeding geometries for rectenna design at 2.45 GHz are described. The proposed rectenna consists of two layers low cost FR-4 substrates in which circular polarisation and harmonic rejection properties are embedded. A voltage doubler rectifier with open stub matching network and the radial stub is designed at the bottom substrate to transform the ac signals to a dc voltage. A right triangular slot is designed in the ground plane to suppress second and third harmonics which improves the rectenna conversion efficiency to 75.043% at an input power of 20 dBm. The proposed rectenna design has the advantages of providing circular polarisation and harmonic rejection with a compact size and low cost which makes it a good candidate for microwave power transmission applications.