A Study on the Curvilinearly Shaping Method for Wide-Band Wire Antennas

와이어 안테나의 광대역화를 위한 형상 굴곡화에 관한 연구

  • Park, Eui-Joon (School of Electronic Eng., Kumoh National University of Technology) ;
  • Lee, Young-Soon (School of Electronic Eng., Kumoh National University of Technology) ;
  • Kim, Byung-Chul (School of Electronic Eng., Kumoh National University of Technology) ;
  • Chung, Hoon (School of Electronic Eng., Kumoh National University of Technology) ;
  • Cho, Jae-Wook (School of Electronic Eng., Kumoh National University of Technology)
  • 박의준 (금오공과대학교 전자공학부) ;
  • 이영순 (금오공과대학교 전자공학부) ;
  • 김병철 (금오공과대학교 전자공학부) ;
  • 정훈 (금오공과대학교 전자공학부) ;
  • 조재욱 (금오공과대학교 전자공학부)
  • Published : 2000.04.01

Abstract

A method is presented to alter the geometry of the conventional linearly shaped wire antenna for increasing its bandwidth. The synthesis is two-demensionally symmetric and is based on the minimization of frequency-dependence of the boresight far-field electric field intensity. The current distribution on the wire is calculated by Galerkin method using pulse functions. The shaping limitation for wide-band characteristics is still found because of standing waves due to reflected waves from antenna ends. The limitation overcome by a distribution of resistive loads near ends of wire. The antenna loaded resistively has flat characteristics satisfying a power gain of $6.5\pm1.1$dBi and VSWR of at most 2 over 10:1 bandwidth. The results are verified by comparing with similar results for the conventional linear V-dipole.

와이어 안테나의 대역폭 향상을 위해 기존의 선형적인 기하학적 구조를 변경시키는 방법을 제안하였다. 그 구조 합성은 이차원적으로 이루어지며, 원거리 boresight 전장의 주파수 의존성을 최소화시키는데 그 기본을 두고 있다. 안테나상의 전류분포는 펄스함수를 이용한 Galerkin법을 사용하여 계산하였다. 안테나 끝부분에서의 반사파에 의해 와이어상에 정재파가 존재하여 광대역화에 한계가 있으므로, 이 영향을 줄이기 위해 합성된 안테 나 끝부분에 저항을 적절히 분포시켰다. 그 결과 10:1 대역폭에서 전력이득이 $6.5\pm1.1$dBi, 정재파비가 2 이하인 평탄한 특성을 만족시킬 수 있었다. 종래의 선형 v-다이폴의 성능과 비교. 분석함으로써 제시한 방법의 타당성을 보였다.

Keywords

References

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