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


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.


  1. Kin-Lu Wong, Vi-Fang Lin, 'Stripline-fed printed triangular monopole', Electronics Letters, vol. 33, pp. 1428-1429, Aug. 1997
  2. Z. N. Chen, 'Broadband planar monopole antenna', Microwaves, Antennas and Propagation, IEE Proceedings, vol. 147, pp. 526-528, Dec. 2000
  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
  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