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http://dx.doi.org/10.12815/kits.2017.16.5.144

Miniaturized λ/4 Folded Microstrip Antenna using Parasitic Element for Parking Management System  

Shin, Jae-yoon (Dept. of Radio Science and Engineering, Univ. of Chungnam)
Woo, Jong-myung (Dept. of Radio Science and Engineering, Univ. of Chungnam)
Park, Chong-hwan (Dept. of Radio Science and Engineering, Univ. of Chungnam)
Keum, Jae-min (Dept. of Radio Science and Engineering, Univ. of Chungnam)
Publication Information
The Journal of The Korea Institute of Intelligent Transport Systems / v.16, no.5, 2017 , pp. 144-151 More about this Journal
Abstract
In this paper, the antenna for parking management using wireless communication in outdoor parking environment was proposed. The proposed antenna was miniaturized by using parasitic element to reduce the size of the radiating element of the basic ${\lambda}/2$ microstrip antenna. The dimensions of the proposed antenna are $35mm{\times}35mm{\times}20.1mm$ that is 98.7% smaller than $309.1mm(0.46{\lambda}){\times}296.1mm(0.441{\lambda}){\times}20.1mm(0.029{\lambda})$ of the basic ${\lambda}/2$ microstrip antenna. The electrical characteristics of the antenna are 1.1 dBi at the center frequency of 447 MHz, an omni-directional radiation pattern on the E-plane, and $87.5^{\circ}$ of HPBW on the H-plane. The miniaturized ${\lambda}/4$ folded microstrip antenna using parasitic element has proved to be easy to mount on the wireless repeater, the sensor node installed on the ground, and the strop bar in the outdoor parking environment.
Keywords
Microstrip Antenna; Parasitic Element; Perturbation Effect; Smart Parking; Parking Management;
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