Browsing by Subject "Bandwidth"
Now showing items 1-20 of 30
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Conference Object
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Article
Bandwidth and Directivity Enhancement of Loop Antenna by Nonperiodic Distribution of Mu-Negative Metamaterial Unit Cells
(2016)The theory, design, analysis, and verification of a wideband and unidirectional loop antenna loaded with mu-negative (MNG) metamaterial unit cells is presented. It is shown that by nonperiodic positioning of MNG unit cells ...
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Conference Object
Bandwidth and directivity enhancement of metamaterial-loaded loop antennas for microwave imaging applications
(Institute of Electrical and Electronics Engineers Inc., 2017)Compact, wideband and unidirectional loop antennas are presented, that are based on a conventional planar loop antenna that is loaded in a mu-negative (MNG) fashion with series capacitors, enabling a mu-zero (MZR) resonance ...
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Conference Object
A broadband 1:4 Series power divider using metamaterial phase-shifting lines
(2005)A metamaterial 1:4 series power divider that provides equal power split to all four output ports over a large bandwidth Is presented. The divider comprises four non-radiating metamaterial lines In series that can each Incur ...
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Conference Object
A broadband balun using metamaterial phase-shifting lines
(2005)A 3-port device that converts a single-ended input to a differential output over a large bandwidth is presented. The balun comprises a Wilkinson divider, followed by a +90° negative-refractive-index (NRI) metamaterial (MM) ...
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Article
A broadband series power divider using zero-degree metamaterial phase-shifting lines
(2005)A metamaterial 1:4 series power divider that provides equal power split to all four output ports over a large bandwidth is presented, which can be extended to an arbitrary number of output ports. The divider comprises four ...
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Article
A broadband Wilkinson balun using microstrip metamaterial lines
(2005)A metamaterial balun that converts a single-ended input to a differential output over a large bandwidth is presented. The device also exhibits excellent return loss, isolation, and through characteristics over the same ...
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Article
A compact and low-profile metamaterial ring antenna with vertical polarization
(2005)A compact (λ 0/11 footprint) and low-profile (λ 0/28 height) metamaterial ring antenna is proposed using two metamaterial unit cells. Each constituent unit cell consists of negative-refractive-index (NRI) microstrip ...
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Article
Compact cpw-fed planar monopole antenna with wide circular polarization bandwidth
(2013)The design and implementation of a coplanar waveguide-fed planar monopole antenna with circular polarization and broadband operation is presented. The antenna operates in the Industrial, Scientific, and Medical (ISM) and ...
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Conference Object
A compact crossover using NRI-TL metamaterial lines
(2012)A compact NRI-TL metamaterial branch-line crossover is presented that has an area of λ/36 × λ/12, and is a factor of 81 times smaller than its analogous transmission-line counterpart. Circuit simulations reveal that it ...
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Article
Compact linear lead/lag metamaterial phase shifters for broadband applications
(2003)A compact one-dimensional phase shifter is proposed using alternating sections of negative refractive index (NRI) metamaterials and printed transmission lines (TL). The NRI metamaterial sections consist of lumped element ...
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Conference Object
A compact low-profile high-impedance surface for use as an antenna ground plane
(2011)A compact and low-profile high-impedance surface is proposed which offers a significantly smaller footprint without affecting the usable reflection phase bandwidth of the structure. The unit cell of the proposed surface ...
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Article
Compact Wideband Loop Antenna Partially Loaded With Mu-Negative Metamaterial Unit Cells for Directivity Enhancement
(2016)A wideband and unidirectional loop antenna partially loaded with mu-negative (MNG) metamaterial unit cells is presented. To reduce the electrical size of the antenna, its first resonance is formed by capacitively loading ...
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Conference Object
Conformai wearable monopole antenna backed by a compact EBG structure for body area networks
(Institute of Electrical and Electronics Engineers Inc., 2017)A compact planar monopole antenna backed by an electromagnetic bandgap (EBG) structure is presented. The antenna is conformal to the human body and is intended for wearable applications in wireless body area networks. It ...
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Article
A CPS leaky-wave antenna with reduced beam squinting using NRI-TL metamaterials
(2008)A reduced beam-squinting printed leaky-wave antenna (LWA) is proposed, comprising cascaded negative-refractive-index transmission-line (NRI-TL) metamaterial unit cells. Each NRI-TL unit cell is implemented in co-planar ...
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Conference Object
Detuning detection in induction motors
(2004)In this article we present a model-based scheme to detect detuned indirect field oriented controllers in current fed induction motors. The detection scheme is based on differential geometric techniques. Numerical simulations ...
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Article
Direct quadrature phase shift keying modulation using compact wideband six-port networks
(2012)In this study, the operation of a compact six-port network operating as a quadrature phase shift keying (QPSK) modulator with a wide operational bandwidth is presented. The modulation has been accomplished using two types ...
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Article
Distributed finite-time calculation of node eccentricities, graph radius and graph diameter
(2016)The distributed calculation of node eccentricities, graph radius and graph diameter are fundamental steps to tune network protocols (e.g., setting an adequate time-to-live of packets), to select cluster heads, or to execute ...
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Article
Gain Enhancement of Wideband Metamaterial-Loaded Loop Antenna with Tightly Coupled Arc-Shaped Directors
(2017)A wideband and unidirectional loop antenna with enhanced and stable gain is presented. To reduce the size of the antenna, the loop is loaded with three mu-negative (MNG) metamaterial unit-cells. The proposed unit-cells ...
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Conference Object