Title :
Beam tilted base station antenna with electromagnetic gradient surface
Author :
Yoon, Ji Hwan ; Ahn, Jihwan ; Chang, Kihun ; Yoon, Young Joong
Author_Institution :
Dept. of Electr. & Electron. Eng., Yonsei Univ., Seoul, South Korea
Abstract :
A base station antenna for WCDMA band (1.920-2.170 GHz) application utilizing an electromagnetic gradient surface (EGS) is proposed. The EGS is applied as a reflector of 4×2 dipole array to tilt the beam with electrically without phase shifters on low-profile structure. Therefore the beam can be tilted with lower complexity, smaller size, and cheaper cost compared to conventional mechanical or electrical beam tilting methods. The EGS reflector is designed to provide 6° downward tilt angle of the main beam. The fabricated antenna exhibits 5.6 tilt angle with gain of 16.9 dBi at 2.045 GHz.
Keywords :
UHF antennas; antenna radiation patterns; code division multiple access; dipole antenna arrays; reflector antennas; EGS reflector; WCDMA band; bandwidth 1.920 GHz to 2.170 GHz; beam tilted base station antenna; dipole array; electrical beam tilting; electromagnetic gradient surface; low-profile structure; mechanical beam tilting; Antenna measurements; Arrays; Base stations; Dipole antennas; Reflection; Reflector antennas; Surface impedance;
Conference_Titel :
Electromagnetics in Advanced Applications (ICEAA), 2010 International Conference on
Conference_Location :
Sydney, NSW
Print_ISBN :
978-1-4244-7366-3
DOI :
10.1109/ICEAA.2010.5653759
