Open AccessBroadband multimode antenna and its array for wireless communication base stations
Author(s) -
Wu Rui,
Chu QingXin
Publication year - 2019
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.2018-0187
Subject(s) - wideband , beamwidth , dipole antenna , antenna gain , broadband , bandwidth (computing) , electronic engineering , electrical engineering , acoustics , antenna factor , antenna (radio) , engineering , optoelectronics , physics , telecommunications
A wideband dual‐polarized antenna coupling cross resonator is proposed for LTE 700/ GSM 850/ GSM 900 base stations. An additional resonance is introduced to obtain strong coupling between the dipole and resonator. Moreover, the input impedance of the proposed antenna is steadily close to 50 Ω, which results in better impedance matching. Therefore, a wide bandwidth can be achieved with multiresonance. A prototype is fabricated to verify the proposed design. The measured results show that the antenna has a fractional bandwidth of 35.7% from 690 MH z to 990 MH z for | S 11 | < −15 dB . Stable radiation patterns as well as gain are also obtained over the entire operating band. Moreover, a five‐element antenna array with an electrical downtilt of 0° to 14° is developed for modern base station applications. Measurement shows that a wide impedance bandwidth of 34.7% (690 MH z to 980 MH z), stable HPBW (3‐ dB beamwidth) of 65 ± 5°, and high gain of 13.8 ± 0.6 dB i are achieved with electrical downtilts of 0°, 7°, and 14°.