《Plannar Antenna微带天线资料》.pdf

2003-11 Ansoft Workshop Advanced Planar Antenna Designs for Wireless Devices 金輅(Kin-Lu Wong) 國立中 山大學電機系 Dept. of Electrical Engineering National Sun Yat-Sen University Kaohsiung 80424, Taiwan E-mail: wongkl@mail.nsysu.edu.tw 1 NSYSU, Taiwan Introduction (1) n Wireless Communication devices n Cellular phones (bar type, folder type) n Laptops or Tablet PCs n Personal digital assistants (PDAs) n WLAN in-building access points (on-ceiling, on-wall, or-desk) n Operating bands n AMPS, GSM, DCS, PCS, UMTS, etc. (850, 900, 1800, 1900, 2050 MHz bands, etc.) n WLAN band (2.4, 5.2, 5.8 GHz) n Ultra-wide band (3.1~10.6 GHz) 2 NSYSU, Taiwan Introduction (2) n Some Promising planar antenna types n Planar inverted-F antennas (PIFAs) n Very-low-profile monopoles (bent, folded) n Printed monopole/dipole antennas n Metal-plate antennas (constructed using line-cutting or stamping) n Slot antennas (stamped from metal or integrated with system ground plane) n folded dipole antenna n Ceramic chip antennas (SMT devices) 3 NSYSU, Taiwan Conventional PIFAs n Conventional PIFAs comprise: a top patch, a shorting pin, and a feeding pin. The top patch is mounted above a ground plane; The shorting pin and feeding pin, connected at proper positions to the top patch, have the same length as the distance between the top patch and the ground plane