F. Ghanem
University of Birmingham
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Publication
Featured researches published by F. Ghanem.
IEEE Transactions on Antennas and Propagation | 2011
M. R. Hamid; P. Gardner; Peter S. Hall; F. Ghanem
A novel reconfigurable wideband to narrowband Vivaldi antenna is presented. A single pair of ring slot resonators is located in the Vivaldi to realize frequency reconfiguration, maintaining the original size unchanged. The proposed antenna is capable of switching six different narrow pass bands within a wide operating band of 1-3 GHz, offering added prefiltering functionality. A fully functional prototype has been developed. PIN diode switches were employed at specific locations in the resonator to change its effective electrical length, hence forming different filter configurations. Antenna performance obtained from simulation and measurement results shows good agreement, which verifies the proposed design concepts. The antenna is potentially suitable for applications requiring dynamic band switching such as cognitive radio.
loughborough antennas and propagation conference | 2009
M. R. Hamid; P. Gardner; Peter S. Hall; F. Ghanem
A switched tapered slot antenna that has a capability to operate in four modes of operation is presented. The proposed antenna has a defected ground structure containing eight switchable ring slots to provide a switched band property. Experimental results on a prototype antenna with an ideal switch fully demonstrate the performances of the proposed designs. The proposed antenna could be a suitable solution for applications requiring dynamic band switching, such as cognitive radio.
international workshop on antenna technology | 2011
M. R. Hamid; P. Gardner; Peter S. Hall; F. Ghanem
A novel Vivaldi antenna is presented with tunable stop bands. A microstrip line resonator is coupled to the tapered slot, with three varactors used for tuning. The stop band can be tuned between 2 GHz and 7 GHz, to give a very wide tuning ratio, of 3.5:1. Good agreements between simulated and measured results are observed, which verify the design concepts.
topical conference on antennas and propagation in wireless communications | 2011
P. Gardner; Peter S. Hall; M. R. Hamid; F. Ghanem
The paper reviews the requirements for antennas for use in cognitive radio systems, and presents a summary of some recent developments and future trends in this area.
Wideband, Multiband Antennas and Arrays for Defence or Civil Applications, 2008 Institution of Engineering and Technology Seminar on | 2008
P. Gardner; M. R. Hamid; Peter S. Hall; James R. Kelly; F. Ghanem; Elham Ebrahimi
Electronics Letters | 2010
M. R. Hamid; Peter S. Hall; P. Gardner; F. Ghanem
Microwave and Optical Technology Letters | 2010
M. R. Hamid; P. Gardner; Peter S. Hall; F. Ghanem
Cognitive Radio and Software Defined Radios: Technologies and Techniques, 2008 IET Seminar on | 2008
James R. Kelly; Elham Ebrahimi; Peter S. Hall; P. Gardner; F. Ghanem
Electronics Letters | 2010
M. R. Hamid; P. Gardner; Peter S. Hall; F. Ghanem
Electronics Letters | 2010
James R. Kelly; Peter S. Hall; P. Gardner; F. Ghanem
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