提出一种可应用于便携移动设备中的小型化三频段平面倒F天线(planar inverted F antenna, PIFA).天线通过印刷刻蚀技术直接在相对介电常数为2.8的双面印刷电路板（printed circuit board，PCB）板表面成型.该PIFA结构经过适当的折叠后，表面积仅为160 mm²， 长宽分别为40和4 mm.天线通过50 Ω同轴线馈电，GSM，DCS，PCS 3个工作带宽的中心频点分别为900，1 800和1 900 MHz.在仿真设计的基础上加工了天线实物并进行测量，结果显示，仿真结果与测试结果具有良好的一致性.

A newly designed compact triband PIFA for mobile devices is presented. The antenna is printed on both faces of the printed circuit board (PCB) with             ε_r=2.8. The antenna size is reduced to 160 mm2 by folding, and 4 mm in width and 40 mm in length. The antenna is fed with a 50 Ω coaxial line. The obtained bandwidth covers three bands, centered at 900 MHz for GSM, 1 800 MHz for DCS, and 1 900 MHz for PCS, respectively. A prototype antenna is fabricated and measured. The measured results are consistent with simulated results.