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

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Modified Cross-Aperture Coupled Microstrip Circular Polarization Array Antenna for WLAN

WLAN 대역의 변형된 십자형 개구 결합 마이크로스트립 원형 편파 배열 안테나

  • Seo, Yong-Seok (Department of Electronic and Computer Engineering, Chonnam National University) ;
  • Ahn, Jung-Mo (Department of Electronic and Computer Engineering, Chonnam National University) ;
  • Jung, Jin-Woo (Department of Electronic and Computer Engineering, Chonnam National University) ;
  • Lee, Hyeon-Jin (Department of Radio Science & Engineering, Dongkang College) ;
  • Lim, Yeong-Seog (Department of Electronic and Computer Engineering, Chonnam National University)
  • 서용석 (전남대학교 전자컴퓨터공학과) ;
  • 안중모 (전남대학교 전자컴퓨터공학과) ;
  • 정진우 (전남대학교 전자컴퓨터공학과) ;
  • 이현진 (동강대학 전기전자공학과) ;
  • 임영석 (전남대학교 전자컴퓨터공학과)
  • Published : 2009.12.31
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Abstract

In this paper, cross-aperture coupled microstrip circular polarization antenna is proposed for 5.8 GHz WLAN(Wireless Local Area Network). A single antenna consists of square patch and slots are located in series feed line with $\lambda_g$/4 phase different which make current direction maximum and minimum repeatedly to generate RHCP(Right Handed Circularly Polarization). We are proposed new structure that removed the section which intersected at a right angle and were composed to four separated slots. The proposed cross slots reduce back lobe of radiation pattern and improve antenna gain. Impedance bandwidth of the manufactured $2\times2$ array antenna is from 5.67 to 5.95 GHz and the maximum radiation gain is 10.59 dBi.

본 논문은 충분한 대역폭과 이득을 갖는 5.8 GHz 대역의 무선 LAN용 십자형 개구 결합 마이크로스트립 원형 편파 $2\times2$배열 안테나를 설계 제작하였다. 설계한 안테나는 정사각형 패치를 사용하고 직렬 형태의 급전 선로위에 $\lambda_g$/4 위상차가 나는 곳에 슬롯이 위치하게 하여 전류 방향이 최대 최소가 반복되게 하여 원형 편파를 발생시키게 된다. 기존의 십자형 슬롯 안테나 구조를 수정하여 두 개의 슬롯이 직각으로 교차하는 부분을 없애고 분리된 4개의 슬롯으로 안테나를 설계함으로써 후방 방사를 줄이고 배열을 통해 안테나의 지향성도 개선할 수 있다. 측정된 $2\times2$ 배열 안테나의 대역폭은 5.67~5.95 GHz로 나타났으며, 최대 방사 이득은 10.59 dBi를 얻었다.

Keywords

References

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