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

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Design of a Dual-Band Loop-Type Ground Antenna Using Lumped-Elements

집중 소자를 사용한 이중 대역 루프형 그라운드 안테나 설계

  • Lee, Hyung-Jin (Department of Electronic and Computer Engineering, Hanyang University) ;
  • Liu, Yang (Department of Electronic and Computer Engineering, Hanyang University) ;
  • Lee, Jae-Seok (Department of Electronic and Computer Engineering, Hanyang University) ;
  • Kim, Hyung-Hoon (Department of Electronic and Computer Engineering, Hanyang University) ;
  • Kim, Hyeong-Dong (Department of Electronic and Computer Engineering, Hanyang University)
  • 이형진 (한양대학교 전자컴퓨터통신공학과) ;
  • 류양 (한양대학교 전자컴퓨터통신공학과) ;
  • 이재석 (한양대학교 전자컴퓨터통신공학과) ;
  • 김형훈 (한양대학교 전자컴퓨터통신공학과) ;
  • 김형동 (한양대학교 전자컴퓨터통신공학과)
  • Received : 2011.10.07
  • Accepted : 2012.04.09
  • Published : 2012.05.31
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Abstract

This paper presents a dual band loop-type ground antenna using lumped-elements that control the impedance bandwidth and resonant frequency. The dual-band operation of the proposed antenna is realized by inserting an additional resonated loop feed structure into the reference ground antenna. As the proper value of the capacitor and the inductor are chosen, the impedance bandwidth of our antenna with voltage standing wave ratio(VSWR) equal to 3 is 85 MHz and 725 MHz at the 2.45 and 5.5 GHz frequency band, respectively. Its validity is demonstrated via both the computed and measured results. Good antenna patterns and efficiencies are achieved at the dual frequency bands, as well as the physically small antenna element size($10{\times}5mm^2$).

본 논문에서는 집중 소자로 임피던스 대역폭과 공진 주파수 컨트롤이 가능한 이중 대역 루프형 그라운드 안테나를 제안한다. 제안된 안테나의 이중 대역 특성은 기존의 루프형 그라운드 안테나의 형태에 추가적인 공진루프 급전 구조를 삽입하여 구현하였다. 적절한 캐패시터와 인덕터를 사용하여 2.45 GHz와 5.5 GHz 대역에서 VSWR<3에서 각각 85 MHz와 725 MHz의 임피던스 대역폭을 만족시켰으며, 시뮬레이션과 측정 결과를 통하여 그 타당성을 입증하였다. 제안된 안테나의 면적은 $10{\times}5mm^2$로 작은 크기를 갖고 있을 뿐만 아니라, 구현하고자 한 이중 대역에서 좋은 방사 패턴과 안테나 효율을 나타내었다.

Keywords

References

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