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

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Effects of the Case Currents of Mobile Phone on the Antenna Characteristics

휴대폰 몸체 전류 변화를 이용한 안테나 특성 연구

  • Kim, Jae-Hee (Department of Electronic and Electrical Engineering, Pohang University of Science and Technology) ;
  • Park, Se-Hyun (Embedded System Solution Lab., Samsung Advanced Institute of Technology) ;
  • Kim, Young-Eil (Embedded System Solution Lab., Samsung Advanced Institute of Technology) ;
  • Park, Wee-Sang (Department of Electronic and Electrical Engineering, Pohang University of Science and Technology)
  • 김재희 (포항공과대학교 전자전기공학과) ;
  • 박세현 (삼성종합기술원 임베디드 시스템 솔루션 연구실) ;
  • 김영일 (삼성종합기술원 임베디드 시스템 솔루션 연구실) ;
  • 박위상 (포항공과대학교 전자전기공학과)
  • Published : 2007.02.28
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Abstract

We present two effects of the case currents of a mobile phone on changing the radiation pattern of a PIFA and on enhancing the bandwidth of the monopole antenna. In order to change the radiation pattern, a modification of the ground plane is suggested to suppress the back radiation. The resulting gain is higher than that of a conventional PIFA by 0.5 dB. For enhancing the bandwidth, two parasitic metallic lines are added in the direction orthogonal to the monopole to induce double resonances. The impedance bandwidth of the proposed structure is 341 MHz, which is nearly twice of that of the conventional monopole.

휴대폰 몸체 전류 변화를 이용하여 PIFA의 방사 패턴을 변화시키고, 휴대폰용 모노폴 안테나의 대역폭을 증가시키는 방법을 소개한다. 방사 패턴 변화를 위하여 후엽을 억제하는 변형된 접지면 구조를 제안하였으며, 그 결과 변형하기 전보다 0.5 dB의 이득 향상을 가져왔다. 대역폭 증가를 위하여 모노폴 안테나에 두 개의 공진 주파수를 형성시키도록 평행한 두 개의 기생 도체선을 추가하는 방법을 제안하였다. 대역폭은 341 MHz로 기존의 모노폴 안테나 구조보다 2배 이상 향상되었다.

Keywords

References

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