University of Oulu

Khan, Bilal; Berg, Markus; Rousu, Seppo; Pärssinen, Aarno (2018) Beam switchable vehicular antenna for increased communication range. Progress in electromagnetics research M 66 :203-213.

Beam switchable vehicular antenna for increased communication range

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Author: Khan, Bilal1; Berg, Markus1; Rousu, Seppo2;
Organizations: 1CWC RT University of Oulu, Finland
2PehuTec Oy, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 0.4 MB)
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Language: English
Published: EMW Publishing, 2018
Publish Date: 2018-11-12


In this paper, a beam switchable antenna solution for vehicular use is presented. Main objective is to improve the cellular connectivity of vehicles operating in poor coverage region. An adaptive antenna system operating in the frequency band 824–960MHz having high gain, and full azimuth plane coverage, and main beam in elevation plane pointing towards 90◦, was developed. Beam switchable antenna provides beam-steering in azimuth plane, by switching one antenna element active at a time. The concept of stacked patch antenna with L probe feed was used for a single element. This arrangement gives gain of 7.4–8.2 dBi, and total radiation efficiency of 0.11 dB, over the band, with broadside radiation pattern, and half power beam width of single element up to 80◦. The field measurements for the designed antenna system were performed in poor coverage regions using commercial cellular network. Results were compared to corresponding results of conventional vehicular antenna, having omnidirectional radiation pattern and the gain of 3 dBi. The developed antenna system results in 3.5… 12.7 dB higher RX level than reference antenna and increase communication range from 71km to 109km in open area. Similarly, in suburban area the communication range is increased from 20km to 30.8 km. Also, the narrower beam acts as spatial filter and results in reduced fading.

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Series: Progress in electromagnetics research. M
ISSN: 1937-8726
ISSN-E: 1937-8726
ISSN-L: 1937-8726
Volume: 66
Pages: 203 - 213
DOI: 10.2528/PIERM18010814
Type of Publication: A1 Journal article – refereed
Field of Science: 213 Electronic, automation and communications engineering, electronics
Copyright information: © 2018 EMW Publishing. All rights reserved. Published in this repository with the kind permission of the publisher.