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Design of Miniaturized Broadband Parasitic Patch Antenna Using Reduced Size Main Patch with U-Shaped Parasitic Patches

폭이 좁아진 주 패치와 U자 형태의 기생 패치를 이용한 소형화된 광대역 기생 패치 안테나 설계

  • Wi, Sang-Hyuk (Dept. of Electrical and Electronic Engineering, Yonsei University) ;
  • Kim, Woo-Tae (Dept. of Electrical and Electronic Engineering, Yonsei University) ;
  • Hong, Young-Pyo (Dept. of Electrical and Electronic Engineering, Yonsei University) ;
  • Yuk, Jai-Rim (Sung-nam Mail Center, Ministry of Information and Communication) ;
  • Yook, Jong-Gwan (Dept. of Electrical and Electronic Engineering, Yonsei University)
  • 위상혁 (연세대학교 전기전자공학과) ;
  • 김우태 (연세대학교 전기전자공학과) ;
  • 홍영표 (연세대학교 전기전자공학과) ;
  • 육재림 (정보통신부 성남우편집중국) ;
  • 육종관 (연세대학교 전기전자공학과)
  • Published : 2007.04.30

Abstract

This paper proposes miniaturized broadband parasitic patch antenna. The proposed antenna consists of a probe fed reduced size main patch and U-shaped parasitic patches. The parasitic patches are incorporated to the radiating edges of the main patch to miniaturize the antenna size. The broadband impedance matching can be achieved by either E-plane or H-plane electromagnetic coupling between main patch and parasitic elements. The size of radiating elements is $18{\times}17.6\;mm^2$ and the overall dimension of designed antenna with substrate and ground plane is $25{\times}30{\times}4\;mm^3$. The fabricated antenna on a FR4 substrate shows two resonant frequencies(5.12 GHz and 6.08 GHz) with 27.3 %(1.5 GHz) fractional bandwidth at 5.5 GHz center frequency. The calculated and measured radiation patterns are almost similar to conventional patch antenna.

본 논문은 크기가 소형화된 광대역 기생 패치 안테나를 제안한다. 폭이 좁아진 주 패치의 두 방사 모서리부에 U자 형태의 기생 패치를 설계하여 안테나 전체 크기를 감소시키고, 주 패치와 기생 패치 사이의 E-plane 및 H-plane을 통한 electromagnetic coupling에 의해 광대역 특성을 얻는다. 안테나 방사 소자들의 전체 크기는 $18{\times}17.6\;mm^2$ 이고, 접지면과 유전체를 포함한 전체 크기는 $25{\times}30{\times}4\;mm^3$이다. 설계된 안테나는 FR4 유전체를 이용해 제작하였으며, 5.12 GHz와 6.08 GHz의 공진 주파수와 5.5 GHz 중심 주파수를 기준으로 27.3 %(1.5 GHz)의 대역폭을 갖는다. 측정된 안테나의 방사 패턴은 일반적인 마이크로스트립 패치 안테나와 유사하다.

Keywords

References

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