Open AccessElectromagnetic band gap‐dipole sub‐array antennas creating an enhanced tilted beams for future base station
Author(s) -
Kim Ilkyu,
RahmatSamii Yahya
Publication year - 2015
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2014.0104
Subject(s) - directivity , dipole antenna , optics , antenna (radio) , tilt (camera) , dipole , beam (structure) , antenna array , antenna gain , physics , ground plane , impedance matching , acoustics , electrical impedance , antenna aperture , electrical engineering , engineering , quantum mechanics , mechanical engineering
A novel customised electromagnetic band gap (EBG)‐dipole sub‐array antenna with a tilted beam for future base‐station applications is presented. An enhanced tilted beam for the base‐station antenna is one of the safest methods to increase radio coverage area adhering to the strict power requirements. An array of four dipole‐EBG elements is designed demonstrating the enhanced down‐tilt beam. Each single element consists of dipole antenna mounted on a customised EBG ground plane created by connecting several unit cells of the EBG. The proposed array radiates a tilted beam in order to achieve a high directivity at fixed down‐tilt angle. The array antennas are simulated, fabricated and measured. The directivity of 11 dB is measured at the angle of 28° at 3.5 GHz. This directivity is 1.9 dB higher than the reference case that uses the broadside single element. In addition, the EBG‐dipole array that can be mechanically tilted is designed. The proposed array antenna exhibits acceptable impedance matching across the operational frequency band.