Title :
Dual-frequency strip-sleeve monopole for laptop computers
Author :
Ali, M. ; Okoniewski, M. ; Stuchly, M.A. ; Stuckly, S.S.
Author_Institution :
Dept. of Electr. & Comput. Eng., Victoria Univ., BC, Canada
fDate :
2/1/1999 12:00:00 AM
Abstract :
A novel dual-frequency strip-sleeve monopole antenna for use on a laptop computer is described. The antenna operates simultaneously in the 0.824-0.894 GHz and 1.85-1.99 GHz bands of the AMPS and the PCS systems with return-loss less than -9.5 dB. Effects of several antenna and computer parameters on the input impedance, radiation pattern, and directivity are given. The parameters considered include an angle between the keyboard and the screen, dielectric materials of the keyboard and the screen, number of parasitic antenna sleeves, and the dielectric covering the antenna
Keywords :
UHF antennas; antenna radiation patterns; electric impedance; laptop computers; mobile antennas; monopole antennas; multifrequency antennas; personal communication networks; radomes; 0.824 to 0.894 GHz; 1.85 to 1.99 GHz; FDTD method; PCS systems; UHF; angle; antenna parameters; computer parameters; dielectric covering; dielectric materials; directivity; dual-frequency strip-sleeve monopole; input impedance; keyboard; laptop computers; parasitic antenna sleeves; radiation pattern; return-loss; screen; Antenna radiation patterns; Finite difference methods; Frequency; Geometry; Impedance; Keyboards; Perfectly matched layers; Personal communication networks; Portable computers; Time domain analysis;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
