The Journal of Korean Institute of Electromagnetic Engineering and Science (한국전자파학회논문지)

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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An Ultra Wideband Printed Monopole Antenna Using Modified Ground Plane

변형된 접지면을 이용한 초광대역 프린티드 모노폴 안테나

  • Kim Myoung-Bum (School of Electrical and Computer Engineering, Ajou University) ;
  • Jung Jong-Ho (School of Electrical and Computer Engineering, Ajou University) ;
  • Park Ikmo (School of Electrical and Computer Engineering, Ajou University)
  • 김명범 (아주대학교 전자공학부) ;
  • 정종호 (아주대학교 전자공학부) ;
  • 박익모 (아주대학교 전자공학부)
  • Published : 2005.03.01
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Abstract

In this paper, we propose a microstrip line fed printed monopole antenna which has an ultra-wideband characteristic. Proposed antenna can improve the bandwidth characteristic with the taper structure formed by modified ground plane and radiating element. Measured impedance bandwidth ratio of the antenna is more than 30:1; from the lower frequency of 0.89 GHz to the upper frequency of more than 30 GHz for VSRW$\leq$2. The antenna has conical radiation pattern that has low radiation gain to $\theta$=0$^{\circ}$ direction and higher radiation gains as $\theta$ increases.

본 논문에서는 초광대역 특성을 가지는 프린티드 모노폴 안테나를 제안하였다. 제안한 안테나는 마이크로스트립 급전구조를 사용하였으며, 변형된 접지면과 복사소자 사이에 형성된 테이퍼 구조는 입력 임피던스의 변화를 개선시킴으로써 광대역 특성을 구현하였다. 제안한 안테나를 최적화 시킨 후, 제작 ·측정한 결과 VSWR$\leq$2를 기준으로 하한 주파수 0.89 GHz에서 상한 주파수 30 GHz 이상의 초광대역 특성을 갖는다. 안테나의 복사형태는 $\theta$=0$^{\circ}$ 방향에서 복사 이득이 아주 낮고, $\theta$값이 증가하면서 복사 이득이 증가하는 코니컬 빔 복사 패턴을 갖는다.

Keywords

References

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