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International Journal of Antennas and Propagation
Volume 2014, Article ID 542953, 10 pages
http://dx.doi.org/10.1155/2014/542953
Research Article

A Stacked Microstrip Antenna Array with Fractal Patches

College of Electronics and Information, Sichuan University, Chengdu 610064, China

Received 22 October 2013; Revised 26 November 2013; Accepted 16 December 2013; Published 9 February 2014

Academic Editor: Xiuping Li

Copyright © 2014 Xueyao Ren 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

A novel microstrip antenna array, which utilizes Giuseppe Peano fractal shaped patches as its radiation elements and adopts a two-layer stacked structure for achieving both wideband and high-gain properties, is proposed. Parametric study estimates that the proposed antenna’s size can be arbitrarily adjusted by changing the fractal proportion while high aperture efficiency is maintained. Two prototypes with 2 × 2 and 4 × 4 fractal patches, respectively, on each layer are designed, fabricated, and measured. Both simulation and measurement results demonstrate that the proposed antenna possesses encouraging performances of wideband, high directivity, and high aperture efficiency simultaneously; for example, for the two prototypes, their  dB impedance bandwidths are 23.49% and 18.49%, respectively; at the working frequency of 5.8 GHz, their directivities are 12.2 dBi and 18.2 dBi, and their corresponding aperture efficiencies are up to 91.0% and 90.5%, respectively.