A hybrid printed monopole antenna loaded with dielectric resonator for wideband and circular polarization applications

Research Abstract
This article presents a novel compactcircularly polarized antenna with wideband operation. The proposed antenna consists of a microstrip-line-fed printed monopole, a finite truncated ground, and a dielectric resonator (DR). Compared to the printed monopole antenna, the proposed DR-loaded antenna has an increased impedance bandwidth, a large axial ratiobandwidth, and a good realized gain across the desired frequency range. An antenna prototype is fabricated and experimentally tested. The measured antenna impedance match is better than _10 dB over 90% from 4.5 to 11.8 GHz frequency band and the 3-dB axial-ratio bandwidth is better than 35% covering the 5.4–7.65 GHz frequency band.
Research Authors
O. M. Haraz, A. R. Sebak, and T. A. Denidni
Research Department
Electrical Engineering Department
Research Journal
International Journal of RF and Microwave Computer-Aided Engineering
Research Member
Osama Mohamed Haraz Ahmed
Research Pages
Pages 588–593
Research Publisher
Wiley
Research Rank
1
Research Vol
Volume 22, Issue 5
Research Year
2012

Multiple representations for situated agent-based learning

Research Authors
Gero, J. S. and Reffat, R. M.
Research Department
Architecture Engineering Department
Research Journal
in B. Verma and X. Yao (eds), International Conference on Computational Intelligence and Multimedia Applications (ICCIMA’97), Griffith University, Gold Coast, Queensland, Australia
Research Member
Rabee M. Reffat
Research Pages
PP. 81-85
Research Year
1997

Computational situated learning in design”, in Gero, J. S. (ed.), Artificial Intelligence in Design'00, Kluwer, Dordrecht

Research Authors
Reffat, R. M. and Gero, J. S.
Research Department
Architecture Engineering Department
Research Journal
in Gero, J. S. (ed.), Artificial Intelligence in Design'00, Kluwer, Dordrecht
Research Member
Rabee M. Reffat
Research Pages
PP. 589-610
Research Year
2000

Towards active support systems for architectural designing

Research Authors
Reffat, R. M. and Gero, J. S.
Research Department
Architecture Engineering Department
Research Journal
in D. Donath (ed.), Proceedings of the 18th Conference on Education of Computer Aided Architectural Design in Europe (eCAADe2000): Promise and Reality, Bauhaus Universitat, Weimar
Research Member
Rabee M. Reffat
Research Pages
PP. 143-147
Research Year
2000
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