http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
金俊圭(Jun-Kyu Kim),姜聲遠(Sung-Won Gang),千昌律(Chang-Yel Cheon) 대한전기학회 2007 전기학회논문지 Vol.56 No.4
Integration of RF front end module(FEM) into the antenna has been investigated in USPCS band (1.88㎓-1.99㎓). 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 19㎜ by l0 by 6㎜ under which FEM whose size is 8㎜ by 5㎜ by 1.5㎜ 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 20㏈. The antenna patterns are shown with and without FEM.