Title :
Design of small and broad-band internal antennas for IMT-2000 mobile handsets
Author :
Wang, Ya Jun ; Lee, Ching Kwang ; Koh, Wee Jin ; Gan, Yeow Beng
Author_Institution :
Electromagn. Compatibility Group, Defense Sci. Organ. Nat. Labs., Singapore
fDate :
8/1/2001 12:00:00 AM
Abstract :
The objective of this paper is to design some small broad-band internal antennas for third-generation International Mobile Telecommunications-2000 (IMT-2000) mobile handsets. By introducing substrates of low dielectric constants and electromagnetically coupling two shorted microstrip patch elements, of either rectangular or semidisc shape, both compactness and broad bandwidth can be achieved. These novel internal antennas for IMT-2000 mobile handsets incorporate only one single probe feed in a driven patch element, white the broad-band feature is obtained by realizing dual-frequency operation. The typical impedance behavior and far-field radiation pattern characteristics of eight different antenna configurations are discussed theoretically and experimentally
Keywords :
antenna radiation patterns; cellular radio; microstrip antennas; mobile antennas; multifrequency antennas; telephone sets; IMT-2000 mobile handset; dielectric substrate; dual-frequency operation; electromagnetic coupling; far-field radiation pattern; input impedance; microstrip patch element; single probe feed; small broadband internal antenna; third-generation cellular system; Antenna feeds; Bandwidth; Dielectric constant; Dielectric substrates; Electromagnetic coupling; Microstrip; Mobile antennas; Mobile handsets; Probes; Shape;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
