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International Journal of Antennas and Propagation
Volume 2013, Article ID 385260, 10 pages
http://dx.doi.org/10.1155/2013/385260
Review Article

Comparative Study of Antenna Designs for RF Energy Harvesting

1Department of Information and Communication Engineering, Chosun University, 309 Pilmun-daero Dong-gu, Gwangju 501-759, Republic of Korea
2Department of Photoelectronics Information, Chosun College of Science and Technology, Republic of Korea

Received 2 February 2012; Accepted 17 January 2013

Academic Editor: Hala A. Elsadek

Copyright © 2013 Sika Shrestha et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In the last few years, several antenna designs of rectenna that meet various objectives have been proposed for use in RF energy harvesting. Among various antennas, microstrip patch antennas are widely used because of their low profile, light weight, and planar structure. Conventional patch antennas are rectangular or circular in shape, but variations in their basic design are made for different purposes. This paper begins with an explanation and discussion of different designs, put forward with an aim of miniaturization, harmonic rejection, and reconfigurability. Finally, microstrip patch structured rectennas are evaluated and compared with an emphasis on the various methods adopted to obtain a compact rectenna, harmonic rejection functionality, and frequency and polarization selectivity.