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A Study on the Small Loop Antenna with a Parasitic Loop Structure for Multiband Mobile Phone Application

기생 루프 구조를 이용한 휴대 단말기용 다중 대역 초소형 루프 안테나에 관한 연구

  • Lee, Sang-Heun (Department of Electrical and Electronic Engineering, Yonsei University) ;
  • Kim, Ki-Joon (Department of Electrical and Electronic Engineering, Yonsei University) ;
  • Jung, Jong-Ho (Department of Electrical and Electronic Engineering, Yonsei University) ;
  • Yoon, Young-Joong (Department of Electrical and Electronic Engineering, Yonsei University) ;
  • Kim, Byoung-Nam (ACE TECHNOLOGIES CORP. R&D CENTER)
  • 이상흔 (연세대학교 전기전자공학과) ;
  • 김기준 (연세대학교 전기전자공학과) ;
  • 정종호 (연세대학교 전기전자공학과) ;
  • 윤영중 (연세대학교 전기전자공학과) ;
  • 김병남 ((주)에이스테크놀로지 연구소)
  • Accepted : 2010.05.10
  • Published : 2010.06.30

Abstract

In this paper, the small loop antenna with a parasitic loop structure for penta-band mobile phone application is proposed. This antenna is composed of a feed monopole, a radiating loop antenna with a parasitic loop structure and an additional radiating element. The antenna is printed on the very thin flexible substrate to mount on the dielectric carrier with a volume of 40 mm$\times$11 mm$\times$3 mm. The bandwidth of the proposed antenna is 402 MHz(773~1,175 MHz) for low band and 583 MHz(1,622~2,205 MHz) for high band. As a result, the proposed antenna covers the five bands of GSM850, GSM900, DCS1800, PCS1,900 and WCDMA for a 3:1 VSWR. Moreover, the radiation pattern, gain and efficiency are appropriate for mobile handset. Therefore, this antenna is suitable for small sized multi-band mobile handset applications.

본 논문에서는 기생 루프 구조를 이용한 휴대 단말기용 5중 대역 초소형 루프 안테나를 제안한다. 제안된 안테나는 급전 모노폴, 기생 루프 구조를 가진 방사 루프 안테나, 추가 방사 소자로 구성되며, 매우 얇은 연성기판으로 제작된 안테나는 40 mm$\times$11 mm$\times$3 mm 크기의 유전체 캐리어에 장착된다. 제안된 안테나의 대역폭은 저대역에서 402 MHz(773~1,175 MHz)이고, 고대역에서 583 MHz(1,622~2,205 MHz)이다. 그 결과, 제안된 안테나는 VSWR 3:1 기준으로 GSM850, GSM900, DCS1800, PCS1,900, WCDMA 대역을 모두 만족함을 확인할 수 있었고, 방사 패턴, 이득, 효율 측면에서 휴대용 단말기에 적용되기에 적합한 성능을 얻었다. 따라서 제안된 안테나는 초소형 다중 대역 휴대 단말기의 응용 분야에 적합할 것으로 판단된다.

Keywords

References

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