The Journal of Korea Institute of Information, Electronics, and Communication Technology (한국정보전자통신기술학회논문지)
- Volume 1 Issue 2
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- Pages.57-63
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- 2008
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- 2005-081X(pISSN)
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- 2288-9302(eISSN)
The development of a Hipass antenna with the beam-tilted properties
빔틸트 특성을 갖는 하이패스 안테나의 개발
- Published : 2008.09.30
Abstract
In this paper, we develop the Hipass antenna that is used in electronic tall-gate charging (ETC) system in Korea expressway. This antenna has circular polarized characteristics, and especially has 45 degree tilted beam properties. These properties are very effective in ETC communication between the vehicle antenna and the tall-gate antenna. To achieve these properties on a small microstrip type antenna structure, we propose a annular ring microstrip antenna with stubs. When the length and angle of stubs are changed, the direction of the circular polarized beam is generally tilted by