Browsing by Author "Quevedo-Teruel, O."

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A Compact Antenna Based on SRR and Spiral with Increased Bandwidth and Radiation Efficiency
(2011)
Yang Shuyan
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Kehn, M. Ng Mou
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Quevedo-Teruel, O.
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Rajo-Iglesias, E.
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傳播研究所
A compact planar microstrip antenna capable of providing tunable dual bands, broader bandwidths, and higher efficiencies is proposed. It is composed of a split ring resonator (SRR) etched on a topmost dielectric slab, together with a metallic spiral printed on a middle slab beneath and shorted via a pin to the metal ground plane. This pin drills through a bottom dielectric layer on which a feed line comprising a rectangular microstrip and a meander line for matching is printed. We seek to merge two resonances so as to expand the bandwidth (-10dB), and increase the radiation efficiency. The designed antenna is of size 0.11 lambda(o) along each side or 0.18 dielectric wavelength (epsilon(r) = 2.2). The achieved efficiency is 55% at 1.7GHz, and the bandwidth is more than double that of the single band counterpart.
A New Discovery for Increasing the Total Efficiency of a Multiband Microstrip Antenna Using a Modified Split Ring Resonator with a Configurable Mechanism
(2011)
Yen, Ta-Lung
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Kehn, M. Ng Mou
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Quevedo-Teruel, O.
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Rajo-Iglesias, E.
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傳播研究所
In this paper, a new method for increasing the total efficiency of a dual band compact antenna which usually has low values is presented. A newly-devised modified version of the SRR (Split Ring Resonator) is used to create another band with a higher total efficiency compared to those of the two bands and establish a configurable shift mechanism so as to merge it with the lower band of the original dual band. Not only does the total efficiency of the lower band of the dual band improved, the bandwidth also gets wider by this method. The size of the antenna we proposed is just lambda(0)/8 x lambda(0)/8 for the lower operation frequency even with low permittivity material (epsilon(r) = 2.2) as substrates. The simulation results of s-parameters and total efficiency are provided.
On the Increase of the Efficiency and Bandwidth of Compact PIFAs based on SRR by Making Use of Lumped Capacitors
(2010)
Quevedo-Teruel, O.
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Kehn, M. Ng Mou
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Pucci, E.
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Rajo-Iglesias, E.
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電機工程學系
Planar lenses by tailoring holey waveguides
(2015)
Quevedo-Teruel, O.
;
Ebrahimpouri, M.
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Kehn, M. Ng Mou
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電子工程學系及電子研究所
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Department of Electronics Engineering and Institute of Electronics