Abutarboush, H.F., Nilavalan, R., Nasr, K.M. ORCID: https://orcid.org/0000-0002-8604-6274, Cheung, S.W., Peter, T., Al-Raweshidy, H.S. and Budimir, D. (2011) Reconfigurable tri-band H-shaped antenna with frequency selectivity feature for compact wireless communication systems. IET Microwaves, Antennas & Propagation, 5 (14). pp. 1675-1682. ISSN 1751-8725 (doi:10.1049/iet-map.2010.0518)

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Abstract

This study presents an H-shaped reconfigurable antenna for wireless applications. The antenna consists of an H-shape radiator and a CPW printed on a circuit board and a varactor diode connecting the upper and lower arms of the H-shape radiator for reconfigurability. The uniqueness of the antenna lies on the ability to select the operating mode and frequencies electronically using a varactor diode. By selecting the DC-bias voltages of 11.5, 10 and 8 V across the varactor diode, which in turn selects the corresponding varactor capacitances of 2, 4 and 6 pF, the antenna can be controlled to operate in three different modes, namely a single-band mode to cover the GSM1900, a dual-band mode at 1.88 and 2.4 GHz to cover the GSM1900 and Bluetooth/WLAN, respectively and a tri-band mode at 1.57, 1.88 and 2.4 GHz to cover the GSM1900, WLAN and GPS, respectively. Furthermore, by varying the varactor capacitance from 7 to 13 pF, the GPS and WLAN bands can be tuned by 11.44% (1.57-1.4 GHz) and 6.46% (2.4-2.25 GHz), respectively, yet keeping the 1.88-GHz band unchanged. Detailed studies on the antenna's performance are carried out to investigate the behaviour of the antenna at each resonant frequency in each operating mode.

Item Type:	Article
Uncontrolled Keywords:	bluetooth, cellular radio, global positioning system, microwave antennas, multifrequency antennas, varactors, wireless LAN
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science Faculty of Engineering & Science > School of Engineering (ENG)
Last Modified:	02 Oct 2019 12:33
URI:	http://gala.gre.ac.uk/id/eprint/25333

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