A design of attaching the antenna to USPCS Band FEM

Jun Kyu Kim, Sung Won Gang, Chang Yul Cheon

Research output: Contribution to journalArticlepeer-review


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(PEFA) 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 1.5mm 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.

Original languageEnglish
Pages (from-to)768-772
Number of pages5
JournalTransactions of the Korean Institute of Electrical Engineers
Issue number4
StatePublished - 2007


  • FEM
  • Intenna
  • PIFA
  • Planar antenna


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