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International Journal of Antennas and Propagation
Volume 2015, Article ID 328208, 8 pages
http://dx.doi.org/10.1155/2015/328208
Research Article

A Butterfly-Shaped Wideband Microstrip Patch Antenna for Wireless Communication

1Department of Information Service & Intelligent Control, Shenyang Institute of Automation, Chinese Academy of Sciences, Faculty Office VII, Nanta Street No. 114, Shenhe District, Shenyang 110016, China
2University of Chinese Academy of Sciences, Beijing 100049, China

Received 23 May 2014; Revised 2 September 2014; Accepted 22 September 2014

Academic Editor: Renato Cicchetti

Copyright © 2015 Liling Sun 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 butterfly-shaped patch antenna for wireless communication is introduced in this paper. The antenna is designed for wideband wireless communications and radio-frequency identification (RFID) systems. Two symmetrical quasi-circular arms and two symmetrical round holes are incorporated into the patch of a microstrip antenna to expand its bandwidth. The diameter and position of the circular slots are optimized to achieve a wide bandwidth. The validity of the design concept is demonstrated by means of a prototype having a bandwidth of about 40.1%. The return loss of the butterfly-shaped antenna is greater than 10 dB between 4.15 and 6.36 GHz. The antenna can serve simultaneously most of the modern wireless communication standards.