Open AccessWideband ceiling mount omnidirectional antenna for indoor distributed antenna system applications
Author(s) -
Zhou Lei,
Jiao YongChang,
Qi Yhong,
Weng Zbin,
Ni Tao
Publication year - 2014
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2013.3603
Subject(s) - omnidirectional antenna , radiation pattern , monopole antenna , antenna measurement , acoustics , antenna efficiency , coaxial antenna , antenna (radio) , dipole antenna , antenna factor , optics , physics , computer science , telecommunications
A wideband omnidirectional vertical polarised antenna is presented. By incorporating a shorted coupling top loading structure over two cross‐connected monopole antennas, an enhanced impedance bandwidth of 152% is achieved. The prototype antenna operates from 650 to 4500 MHz, with a reflection coefficient <−15 dB, a 2–6 dBi antenna gain with a very stable vertical radiation pattern and <3.5 dB horizontal pattern ripples. The proposed antenna can be widely used in indoor distributed antenna systems (DASs), such as GSM900, GSM1800, UMTS2100 and the enhanced TD‐LTE (up to 3.5 GHz) bands. The simulated and the measured return loss and radiation pattern results show good agreement.