Title :
Novel small folded shorted-patch antennas
Author :
Li, R.L. ; DeJean, G. ; Tsai, E. ; Tentzeris, E. ; Laskar, J.
Author_Institution :
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
The size of a conventional shorted-patch antenna can be reduced by almost a half via folding the shorted patch together with the ground plane. The resonant frequency of the folded shorted-patch antenna may be further lowered by reducing the width of the shorting walls or by moving the folded patch upward. It is shown that the antenna length of a folded shorted-patch can be reduced to less than 1/8 the length of a conventional patch antenna. A practical folded shorted-patch antenna for the Bluetooth ISM band is designed and measured to demonstrate its application potential. This size-reduced antenna can achieve an impedance bandwidth of 4% and has a nearly omnidirectional radiation pattern, which may be suitable for some mobile communications systems.
Keywords :
Bluetooth; UHF antennas; antenna radiation patterns; electric impedance; microstrip antennas; mobile antennas; 2.4 to 2.483 GHz; Bluetooth; ISM band; folded ground plane; folded shorted-patch antennas; impedance bandwidth; mobile communications systems; omnidirectional radiation pattern; resonant frequency; Bluetooth; Dielectric substrates; Finite difference methods; Microstrip antennas; Mobile antennas; Mobile computing; Patch antennas; Resonant frequency; Time domain analysis; Wireless communication;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2002. IEEE
Print_ISBN :
0-7803-7330-8
DOI :
10.1109/APS.2002.1016918
