PIER Letters
 
Progress In Electromagnetics Research Letters
ISSN: 1937-6480
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ANTENNA ULTRA WIDEBAND ENHANCEMENT BY NON-UNIFORM MATCHING

By M. Hayouni, A. El Oualkadi, F. Choubani, T. H. Vuong, and J. David

Full Article PDF (1,675 KB)

Abstract:
In this paper, antenna ultra wideband enhancement by non-uniform matching is proposed. The antenna consisted of a rectangular shaped radiator with two convex circled corners. Simulated results using CST Microwave Studio and measured results of a fabricated antenna concord well to prove that it can operate from about 3.5 GHz to 4.6 GHz and from 7.4 GHz to 12.7 GHz for S11 (dB) < -10 dB. In addition, a good impedance matching is noted in the IEEE radar engineering X band range since the return loss coefficient remains below -50 dB value at 9.5 GHz and can reach -45 dB at 11 GHz. A current density comparison at 11 GHz, supporting our argument, between a stepper corner and convex corner demonstrates that the current density can reach 52 A/m with a convex corner whereas it does not exceed 33 A/m for the antenna with a stepper corners. Radiation patterns at various frequencies and peak gains show clearly interesting features of such antennas.

Citation:
M. Hayouni, A. El Oualkadi, F. Choubani, T. H. Vuong, and J. David, "Antenna Ultra Wideband Enhancement by Non-Uniform Matching," Progress In Electromagnetics Research Letters, Vol. 31, 121-129, 2012.
doi:10.2528/PIERL12031002

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