A Design of Attaching the Antenna to USPCS Band FEM

USPCS 대역 FEM 부착 안테나 설계

  • 강성원 (서울시립대 전자전기컴퓨터공학부) ;
  • 천창율 (서울시립대 전자전기컴퓨터공학부) ;
  • 김준규 (서울시립대 전자전기컴퓨터공학부)
  • Published : 2007.04.01

Abstract

Integration of RF front end module(FEM) into the antenna has been investigated in USPCS band (1.88GHz-1.99GHz). The FEM consists of input filter, power amplifier, coupler, power detector, bias switch and duplexer. The antenna was designed in planar inverted F antenna(PIFA) structure to implement it inside the handset. In order to avoid strong coupling between the antenna and FEM, a shielding ground layer was placed between them. The antenna size is 19mm by 10mm by 6mm under which FEM whose size is 8mm by 5mm by 1.5m locates. The antenna impedance was selected to match to FEM having better efficiency rather than gain since FEM has enough gain whose system spec is minimum of 20dB. The antenna patterns are shown with and without FEM.

References

  1. K. Fujimoto et al, 'Small Antennas', Reseach Studies Press Ltd.,1987
  2. Rowell, C.R, and Murch, R.D., 'A capacitively loaded PIFA for compact mobile telephone hansets', lEEE Trans. Antennas Propag., 1997
  3. Steven Brebels, 'SOP Integration and Codesign of Antennas', IEEE Transaction on advanced packaging., 2004
  4. Kin-Lu Wong, 'Planar Antennas for Wireless Communications', Jhon Wiley & Sons Inc., 2003