Antenna設計5Dept. of Electronics & Communication Engineering Harbin Institute of Technology Harbin 150001, P.R. China E-mail: qwu@hit.edu.cn Tel. +86 451 6413502移动通信终端天线设计 (5)吴群教授，工学博士Specially-designed antennaPlanar AntennasWire AntennasBuild-in AntennasDual Band AntennasGSM/DCSCeramic InternalInternal antenna Ceramic low cost dielectric Relatively independent in Impedance Dual band GSM/DCS Overall dimensions: 35 x 35 x 3 mm Weight: 11 grams -2 dBi GSM & -4 dBi DCS -45°C to + 125°C UL94VOTri-Band AntennasGSM/DCS/GSMFlat Tri-BandPosition in phoneTri-band GSM, DCS, GSM 2 spring contacts on antenna No matching Overall dimensions: 30 x 30 x 2 mm-Weight: < 2 grams Need reflector (PCB or Shield)Electrical diagramAntenna element DCS Chock Antenna DCS element portion GSM……