Wideband Omnidirectional Slotted-Waveguide Antenna Array Based on Trapezoidal Slots
This manuscript presents a novel approach for designing wideband omnidirectional slotted-waveguide antenna arrays, which is based on trapezoidal-shaped slots with two different electrical lengths, as well as a twisted distribution of slot groups along the array longitudinal axis. The trapezoidal sec...
Main Authors: | , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Hindawi Limited
2019-01-01
|
Series: | International Journal of Antennas and Propagation |
Online Access: | http://dx.doi.org/10.1155/2019/3792980 |
id |
doaj-f5f431d8e8904514bcad2b9ee595aefe |
---|---|
record_format |
Article |
spelling |
doaj-f5f431d8e8904514bcad2b9ee595aefe2020-11-25T01:07:37ZengHindawi LimitedInternational Journal of Antennas and Propagation1687-58691687-58772019-01-01201910.1155/2019/37929803792980Wideband Omnidirectional Slotted-Waveguide Antenna Array Based on Trapezoidal SlotsHugo Rodrigues Dias Filgueiras0James R. Kelly1Pei Xiao2I. F. da Costa3Arismar Cerqueira Sodré4Laboratory WOCA (Wireless and Optical Convergent Access), National Institute of Telecommunications, Santa Rita do Sapucaí, MG 37540-000, BrazilQueen Mary University of London, Mile End Rd, London E1 4NS, UKICS/5GIC, The University of Surrey, Stag Hill Campus, Guildford GU2 7XH, UKESSS, São Paulo 04552-906, BrazilLaboratory WOCA (Wireless and Optical Convergent Access), National Institute of Telecommunications, Santa Rita do Sapucaí, MG 37540-000, BrazilThis manuscript presents a novel approach for designing wideband omnidirectional slotted-waveguide antenna arrays, which is based on trapezoidal-shaped slots with two different electrical lengths, as well as a twisted distribution of slot groups along the array longitudinal axis. The trapezoidal section is formed by gradually increasing the slot length between the waveguide interior and exterior surfaces. In this way, a smoother impedance transition between waveguide and air is provided in order to enhance the array operating bandwidth. In addition, we propose a twisting technique, responsible to improve the omnidirectional pattern, by means of reducing the gain ripple in the azimuth plane. Experimental results demonstrate 1.09 GHz bandwidth centered at 24 GHz (4.54% fractional bandwidth), gain up to 14.71 dBi over the operating bandwidth, and only 2.7 dB gain variation in the azimuth plane. The proposed antenna array and its enabling techniques present themselves as promising solutions for mm-wave application, including 5G enhanced mobile broadband (eMBB) communications.http://dx.doi.org/10.1155/2019/3792980 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Hugo Rodrigues Dias Filgueiras James R. Kelly Pei Xiao I. F. da Costa Arismar Cerqueira Sodré |
spellingShingle |
Hugo Rodrigues Dias Filgueiras James R. Kelly Pei Xiao I. F. da Costa Arismar Cerqueira Sodré Wideband Omnidirectional Slotted-Waveguide Antenna Array Based on Trapezoidal Slots International Journal of Antennas and Propagation |
author_facet |
Hugo Rodrigues Dias Filgueiras James R. Kelly Pei Xiao I. F. da Costa Arismar Cerqueira Sodré |
author_sort |
Hugo Rodrigues Dias Filgueiras |
title |
Wideband Omnidirectional Slotted-Waveguide Antenna Array Based on Trapezoidal Slots |
title_short |
Wideband Omnidirectional Slotted-Waveguide Antenna Array Based on Trapezoidal Slots |
title_full |
Wideband Omnidirectional Slotted-Waveguide Antenna Array Based on Trapezoidal Slots |
title_fullStr |
Wideband Omnidirectional Slotted-Waveguide Antenna Array Based on Trapezoidal Slots |
title_full_unstemmed |
Wideband Omnidirectional Slotted-Waveguide Antenna Array Based on Trapezoidal Slots |
title_sort |
wideband omnidirectional slotted-waveguide antenna array based on trapezoidal slots |
publisher |
Hindawi Limited |
series |
International Journal of Antennas and Propagation |
issn |
1687-5869 1687-5877 |
publishDate |
2019-01-01 |
description |
This manuscript presents a novel approach for designing wideband omnidirectional slotted-waveguide antenna arrays, which is based on trapezoidal-shaped slots with two different electrical lengths, as well as a twisted distribution of slot groups along the array longitudinal axis. The trapezoidal section is formed by gradually increasing the slot length between the waveguide interior and exterior surfaces. In this way, a smoother impedance transition between waveguide and air is provided in order to enhance the array operating bandwidth. In addition, we propose a twisting technique, responsible to improve the omnidirectional pattern, by means of reducing the gain ripple in the azimuth plane. Experimental results demonstrate 1.09 GHz bandwidth centered at 24 GHz (4.54% fractional bandwidth), gain up to 14.71 dBi over the operating bandwidth, and only 2.7 dB gain variation in the azimuth plane. The proposed antenna array and its enabling techniques present themselves as promising solutions for mm-wave application, including 5G enhanced mobile broadband (eMBB) communications. |
url |
http://dx.doi.org/10.1155/2019/3792980 |
work_keys_str_mv |
AT hugorodriguesdiasfilgueiras widebandomnidirectionalslottedwaveguideantennaarraybasedontrapezoidalslots AT jamesrkelly widebandomnidirectionalslottedwaveguideantennaarraybasedontrapezoidalslots AT peixiao widebandomnidirectionalslottedwaveguideantennaarraybasedontrapezoidalslots AT ifdacosta widebandomnidirectionalslottedwaveguideantennaarraybasedontrapezoidalslots AT arismarcerqueirasodre widebandomnidirectionalslottedwaveguideantennaarraybasedontrapezoidalslots |
_version_ |
1725186406500794368 |