Wideband ceiling mount omnidirectional antenna for indoor distributed antenna system applications

Author

Lei Zhou ; Yong-Chang Jiao ; Yhong Qi ; Zbin Weng ; Tao Ni

Author_Institution

Nat. Lab. of Antennas & Microwave Technol., Xidian Univ., Xi´an, China

Volume

50

Issue

4

fYear

2014

fDate

February 13 2014

Firstpage

253

Lastpage

255

Abstract

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.

Keywords

UHF antennas; antenna radiation patterns; broadband antennas; electric impedance; electromagnetic wave polarisation; electromagnetic wave reflection; microwave antennas; monopole antennas; omnidirectional antennas; DAS; GSM1800; GSM900; TD-LTE; UMTS2100; antenna radiation pattern; cross-connected monopole antenna; frequency 650 MHz to 4500 MHz; horizontal pattern ripple; impedance bandwidth; indoor distributed antenna system; indoor distributed antenna system application; reflection coefficient; wideband ceiling mount omnidirectional antenna; wideband omnidirectional vertical polarised antenna;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el.2013.3603

Filename

6746267