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 3-Fingers Type Internal Antenna for GPS/PCS Handsets

GPS/PCS 단말기용 3-Finger형 내장형 안테나 설계

  • Bang Sang-Won (Department of Radio Science & Engineering Kwangwoon University) ;
  • Jung Byung-Woon (Department of Radio Science & Engineering Kwangwoon University) ;
  • Lee Hak-Yong (Department of Radio Science & Engineering Kwangwoon University) ;
  • Park Myun-Joo (Department of Radio Science & Engineering Kwangwoon University) ;
  • Lee Byungje (Department of Radio Science & Engineering Kwangwoon University)
  • Published : 2005.01.01
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Abstract

This paper proposes a new type of a dual-band internal antenna for GPS/PCS handsets. The antenna has three monopoles in different lengths, and this structure is referred as a 3-fingers type antenna in this paper. The antenna with low-profile structure is designed to use internal space of handset maximally. The fabrication and the measurement are accomplished by attaching the 3-finger type antenna to the inside of a commercial handset. We obtain gain of 1.97 dBi$\~$0.66 dBi in the GPS band, and -0.92 dBi$\~$1.02 dBi in the PCS band and almost omni-directional patterns at all bands.

본 논문에서는 GPS/PCS 단말기에 적합한 새로운 형태의 듀얼밴드 내장형 안테나를 제안하였다. 안테나는 3개의 각기 다른 길이의 모노폴을 함께 급전시킨 형태를 가지며, 본 논문에서는 이러한 형태를 3-Finger형이라 하였다. 안테나의 두께를 얇게 설계하여 단말기 내부의 공간을 최대한으로 활용하였다. 제작되어진 3-Finger 형태의 안테나를 상용화되어진 단말기의 내부에 장착하여 제작 및 측정하였다. GPS 대역에서 -1.97 dBi$\~$0.66dBi, PCS 대역에서는 -0.92 dBi$\~$1.02 dBi의 이득을 얻었으며, 방사패턴은 전 대역에서 전 방향성에 가까움을 확인하였다.

Keywords

References

  1. Kin-Lu Wong, Vi-Fang Lin, 'Stripline-fed printed triangular monopole', Electronics Letters, vol. 33, pp. 1428-1429, Aug. 1997 https://doi.org/10.1049/el:19970960
  2. Z. N. Chen, 'Broadband planar monopole antenna', Microwaves, Antennas and Propagation, IEE Proceedings, vol. 147, pp. 526-528, Dec. 2000 https://doi.org/10.1049/ip-map:20000797
  3. M. Ali, M. Okoniewski, M. A. Stuchly, and S. S. Stuchly, 'A dual-frequency strip-sleeve monopole antenna for a laptop computer', Antennas and Propagation Society International Symposium, 1998. IEEE, vol. 2, pp. 1962-1965, 1998
  4. Duixian Liu, 'Branch number and height effects on the multi-branch tri-band monopole antenna resonance', Antennas and Propagation Society, 2001 IEEE International Sym., vol. 2, pp. 108-111, 2001
  5. Y. D. UN, S. N, TSAI, 'Coplanar waveguide- fed uniplanar bow-tie antenna', IEEE Trans. Antennas and Propag., vol. 45, pp. 305-306, 1997 https://doi.org/10.1109/8.560350
  6. M. J. Ammann, 'Square planar monopole antenna', Antennas and Propagation, 1999 IEE National Conference on., pp. 37-40, Apr. 1999
  7. E. Hallen, 'Theoretical investigations into the transmitting and receiving qualities of antennae', Nove Acta Regiae Soc. Sci. Upsaliensis, ser. IV, pp. 1-44, 1938
  8. M. -C. Huynh, W. Stutzman, 'Ground plane effects on planar inverted-F antenna(PIFA) performance', IEE Proc.-Microw. Antennas and Propag., vol. 150, no. 4, Aug. 2003