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A Small Antenna of High Radiation Efficiency Employing a Ground Radiator

그라운드 방사체를 활용한 고효율의 소형 안테나

  • Choi, Hyeng-Cheul (Department of Electronics Computer Engineering, Hanyang University) ;
  • Lee, Hyung-Jin (Department of Electronics Computer Engineering, Hanyang University) ;
  • Park, Bum-Ki (Department of Electronics Computer Engineering, Hanyang University) ;
  • Jang, Jin-Hyuk (Department of Electronics Computer Engineering, Hanyang University) ;
  • Kim, Hyeong-Dong (Department of Electronics Computer Engineering, Hanyang University)
  • 최형철 (한양대학교 전자컴퓨터통신공학과) ;
  • 이형진 (한양대학교 전자컴퓨터통신공학과) ;
  • 박범기 (한양대학교 전자컴퓨터통신공학과) ;
  • 장진혁 (한양대학교 전자컴퓨터통신공학과) ;
  • 김형동 (한양대학교 전자컴퓨터통신공학과)
  • Received : 2011.07.28
  • Accepted : 2011.12.29
  • Published : 2012.02.29

Abstract

This paper introduces the method to utilize a terminal ground as a radiator only using reactive components without an antenna structure. Characteristics of the proposed antenna is compared with that of the meander IFA on the same ground plane($40{\times}20mm^2$) for the bluetooth band. From simulation and measurement data, it is found that the proposed antenna using only capacitors provides the highest radiation efficiency. This is because of that the higher inductance reduces radiation resistance of a ground and the capacitor has a lower loss resistance comparing to that of the IFA or the inductor. In spite of the high radiation efficiency, the area ($5{\times}2.5mm^2$) of the proposed antenna is less than half of the area ($12{\times}2.5mm^2$) of the IFA.

Keywords

Small Antenna;Ground Radiation;Reactive Component;Radiation Efficiency

Acknowledgement

Supported by : 한국연구재단

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