Open Journal of Antennas and Propagation, 2014, 2, 1-8 Published Online March 2014 in SciRes. http://www.scirp.org/journal/ojapr http://dx.doi.org/10.4236/ojapr.2014.21001 How to cite this paper: Wongsan, R., et al. (2014) A Sector Antenna for Mobile Base Station Using MSA Array with Curved Woodpile EBG. Open Journal of Antennas and Propagation, 2, 1-8. http://dx.doi.org/10.4236/ojapr.2014.21001 A Sector Antenna for Mobile Base Station Using MSA Array with Curved Woodpile EBG Rangsan Wongsan, Piyaporn Krachodnok, Paowphattra Kamphikul * School of Telecommunication Engineering, Institute of Engineering, Suranaree University of Technology, Nakhon Ratchasima, Thailand Email: rangsan@sut.ac.th , priam@sut.ac.th , * D5240395@g.sut.ac.th Received 8 January 2014; revised 17 February 2014; accepted 10 March 2014 Copyright © 2014 by authors and Scientific Research Publishing Inc. This work is licensed under the Creative Commons Attribution International License (CC BY). http://creativecommons.org/licenses/by/4.0/ Abstract This paper presents a sector antenna for base station of mobile phone using microstrip antenna (MSA) array with curved woodpile Electromagnetic Band Gap (EBG). The advantages of this pro- posed antenna are easy fabrication and installation, high gain, and light weight. Moreover, it pro- vides a fan-shaped radiation pattern , a main beam having a narrow beam width in the vertical di- rection and a wider beamwidth in the horizontal direction, which are appropriate for mobile phone base station. The half-power beamwidths in the H-plane and E-plane are 37.4 and 8.7 de- grees, respectively. The paper also presents the design procedures of a 1 × 8 array antenna using MSAs associated with U-shaped reflector for decreasing their back and side lobes. A Computer Si- mulation Technology (CST) software has been used to compute the reflection coefficient (S11), radiation patterns, and gain of this antenna. The bandwidth, at S11 (−10 dB), is enough, which can be well utilized for 3G base station, with a gain 20.84 dB. Keywords Microstrip Antenna; Electromagnetic Band Gap; Base Station 1. Introduction Recently, the development of antennas with new performances becomes currently imperatively essential for the new services and network of telecommunication. Microstrip antennas (MSA) are an attractive choice for many modern communication systems due to their light weight, low profile with conformability, and low cost [1] [2]. In principle, the MSA is a resonant-type antenna, where the antenna size is determined by the operating wave- length while the bandwidth is determined by the Q factor of the resonance. Two of the major disadvantages are * Corresponding author.