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http://dx.doi.org/10.12815/kits.2021.20.4.83

Triple Folded Omnidirectional Microstrip Antenna for GBAS  

Ju, Dae-Keun (Dept. of Radio and Information Communications Engineering Univ. of Chungnam)
Woo, Jong-Myung (Dept. of Radio and Information Communications Engineering Univ. of Chungnam)
Publication Information
The Journal of The Korea Institute of Intelligent Transport Systems / v.20, no.4, 2021 , pp. 83-94 More about this Journal
Abstract
In this paper, we proposed a microstrip antenna (center frequency 118 MHz) with an omnidirectional radiation pattern that can replace the antennae used in VDB systems in GBAS. First, to obtain an omnidirectional radiation pattern from a microstrip antenna, we constructed a folded antenna. We then designed a miniaturized triple-folded antenna using perturbation effects. Thus we obtained suitable characteristics with a S11 of -13.91dB, -10 dB bandwidth of 1.5 MHz (1.27%) in the center frequency of 118 MHz. Furthermore, in the yz-plane and xy-plane, the component exhibits an omnidirectional radiation pattern, and the size of the antenna achieves miniaturization of 64.2% compared to the reference antenna. Finally, it is suitable as an antenna for VDB systems in GBAS.
Keywords
GBAS; VDB antenna; Folded antenna; Omnidirection; Perturbation effect;
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