A Circularly Polarized Sector Antenna for Mobile Base Station Using Single Feed with Metallic Rod EBG

Piyaporn Krachodnok, Rangsan Wongsan, Nuchanart Fhafhiem^*

School of Telecommunication Engineering, Institute of Engineering, Suranaree University of Technology, Nakhon Rachasima, Thailand.

DOI: 10.4236/ojapr.2014.24006                

Abstract

The propose of this paper is to design the circularly polarized antenna for mobile base station, using a curved strip dipole associated with U-shaped reflector and multi-layer metallic rod elec-tromagnetic band gap (EBG). It can be used to simplify the single feed system of an antenna. The advantages of this proposed antenna are easy fabrication and installation, high gain and light weight. Moreover, it provides a sectoral radiation pattern, a main beam having a narrow beam width in the vertical direction and wider beamwidth in the horizontal direction, which are appro-priate for mobile phone base station. The half-power beam in the H-plane and E-plane are 60 and 14.4 degrees, respectively. The antenna is designed and analyzed by using a computer simulation technology (CST). In addition, S₁₁, axial ratio, radiation pattern and gain are displayed. The designed technique could be confirmed by a measurement resulting from prototype antenna corresponding to simulation results. The proposed antenna has a bandwidth covering the frequency range of 1870 - 2170 MHz, and the gain of the antenna increases up to 15.11 dBi.

Keywords

Sector Antenna, Curved Strip Dipole, Electromagnetic Band Gap, Resonator Antenna, Circular Polarization

Conflicts of Interest

The authors declare no conflicts of interest.

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