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International Journal of Antennas and Propagation
Volume 2014, Article ID 704974, 6 pages
Research Article

Novel Design of High-Gain Planar Dipole-Array Antenna for RFID 2.45 GHz

1School of Electronic and Information Engineering, Soochow University, Suzhou, Jiangsu 215000, China
2Suzhou Keylab of RF and Microwave Millimeter Wave Technology, Suzhou, Jiangsu 215000, China

Received 12 September 2013; Accepted 6 November 2013; Published 30 January 2014

Academic Editor: Rezaul Azim

Copyright © 2014 Danpeng Xie 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.


This paper presents a novel high-gain planar dipole-array antenna for 2.45 GHz which consists of four planar dipole elements placed in two parallel lines. Phase retardation of each element is set by feeding network to form controllable radiation direction. The radiation pattern of the array is discussed according to Arrays Theorem. The measured −10 dB band is from 2.3 GHz to 2.57 GHz, and peak gain in this band is 7.5 dBi. The gain can even reach 10.5 dBi after installing additional ground. The proposed antenna has advantages of high gain, controllable direction, and planarity which are suitable for 2.45 GHz RFID base station.