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Type: Journal article
Title: The trapezoidal dielectric resonator antenna
Author: Almpanis, G.
Fumeaux, C.
Vahldieck, R.
Citation: IEEE Transactions on Antennas and Propagation, 2008; 56(9):2810-2816
Publisher: IEEE-Inst Electrical Electronics Engineers Inc
Issue Date: 2008
ISSN: 0018-926X
Statement of
Georgios Almpanis, Christophe Fumeaux and Ruediger Vahldieck
Abstract: The operational concepts of the trapezoidal dielectric resonator antennas (DRAs) are presented and their performance is studied theoretically and experimentally. The rectangular parallelepiped is a special case of the more general trapezoid and therefore a comparison between both is useful in order to highlight their similarities and differences. It is shown in this paper that the inverted trapezoidal DRA exhibits a significantly larger impedance bandwidth than the rectangular parallelepiped, while the rest of their properties remain similar. Based on that, two versions of a probe-fed wide-band linearly polarized (LP) DRA are designed by combing the resonances of the first two lower-order modes of the trapezoidal DRA. The resulting impedance bandwidth exceeds 55% (S₁₁< -10 dB) and the patterns are broadside with low cross-polarization. The antennas are simple to fabricate and they can be easily made to be mechanically stable. The numerical analysis was performed with a commercially available FEM solver and an in-house developed finite-volume-time-domain (FVTD) code. The measurements confirmed the results of the simulations.
DOI: 10.1109/TAP.2008.928787
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Electrical and Electronic Engineering publications

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