Title :
A dual-frequency strip-sleeve monopole antenna for a laptop computer
Author :
Ali, M. ; Okoniewski, M. ; Stuchly, M.A. ; Stuchly, S.S.
Author_Institution :
Dept. of Electr. & Comput. Eng., Victoria Univ., BC, Canada
Abstract :
In this paper a dual-frequency strip-sleeve monopole antenna is described for use on a laptop computer. While a conventional monopole operates at only a single frequency band, the new antenna can operate in the 0.824-0.894 GHz and the 1.85-1.99 GHz frequency bands. The operation of the new antenna in two frequency bands is achieved by use of the two parasitic sleeves. This design is based on the principles described by M. Ali et al. (see Journal Electromagnetic Waves Applications, vol.10, no.9, p.1223-36, 1996) The laptop models are highly simplified and each of them consists of two metal boxes: a keyboard and a screen at an angle /spl alpha/. The new antenna is analyzed using the finite-difference time-domain (FDTD) method.
Keywords :
UHF antennas; antenna radiation patterns; electric impedance; finite difference time-domain analysis; laptop computers; mobile antennas; monopole antennas; multifrequency antennas; 0.824 to 0.894 GHz; 1.85 to 1.99 GHz; FDTD method; dual-frequency strip-sleeve monopole antenna; finite-difference time-domain; input impedance; laptop computer; parasitic sleeves; radiation patterns; Electromagnetic modeling; Electromagnetic scattering; Finite difference methods; Frequency; Keyboards; Portable computers; Time domain analysis;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1998. IEEE
Conference_Location :
Atlanta, GA, USA
Print_ISBN :
0-7803-4478-2
DOI :
10.1109/APS.1998.702058
