Browsing Τμήμα Ηλεκτρολόγων Μηχανικών και Μηχανικών Υπολογιστών / Department of Electrical and Computer Engineering by Author "Antoniades, Marcos A."
Now showing items 21-40 of 69
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Article
Compact EBG-Backed Planar Monopole for BAN Wearable Applications
Abbasi, M. A. B.; Nikolaou, S. S.; Antoniades, Marcos A.; Nikolić Stevanović, M.; Vryonides, P. (2017)This paper presents a planar monopole backed with a 2 × 1 array of electromagnetic bandgap (EBG) structures. The reflection phase of a single EBG unit cell has been studied and exploited toward efficient radiation of a ...
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Article
Compact linear lead/lag metamaterial phase shifters for broadband applications
Antoniades, Marcos A.; Eleftheriades, G. V. (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
Raza, S.; Antoniades, Marcos A.; Eleftheriades, G. V. (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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Conference Object
A compact monopole antenna with a defected ground plane for multi-band applications
Antoniades, Marcos A.; Eleftheriades, G. V. (2008)
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Article
A compact multiband monopole antenna with a defected ground plane
Antoniades, Marcos A.; Eleftheriades, G. V. (2008)A compact multiband antenna is proposed that consists of a printed circular disc monopole antenna with an L-shaped slot cut out of the ground, forming a defected ground plane. Analysis of the current distribution on the ...
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Conference Object
A compact multiband NRI-TL metamaterial-loaded planar antenna for heart failure monitoring
Antoniades, Marcos A.; Abbosh, A. M.; Razali, A. R. (2013)A compact, planar antenna is proposed, which uses negative-refractive-index transmission-line (NRI-TL) metamaterial loading in order to achieve multiband operation with orthogonal pattern diversity in different bands. The ...
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Article
A Compact Multiband Printed Dipole Antenna Loaded with Two Unequal Parallel NRI-TL Metamaterial Unit Cells
Jamilan, S.; Antoniades, Marcos A.; Nourinia, J.; Azarmanesh, M. N. (2015)A negative-refractive-index transmission-line (NRI-TL) metamaterial-loaded dipole antenna is proposed, which has a fully printed configuration and exhibits multiband performance. The antenna consists of a conventional ...
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Article
A compact tri-band monopole antenna with single-cell metamaterial loading
Zhu, J.; Antoniades, Marcos A.; Eleftheriades, G. V. (2010)A compact tri-band planar monopole antenna is proposed that employs reactive loading and a defected ground-plane structure. The reactive loading of the monopole is inspired by transmission-line based metamaterials (TL-MTM), ...
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Article
Compact Wideband Loop Antenna Partially Loaded With Mu-Negative Metamaterial Unit Cells for Directivity Enhancement
Ahdi Rezaeieh, S.; Antoniades, Marcos A.; Abbosh, A. M. (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
Compact, linear, lead/lag phase shifters using negative refractive index metamaterials
Antoniades, Marcos A.; Eleftheriades, G. V. (2003)A new type of phase shifter using cascaded sections of NRI metamaterials and PRI transmission lines is proposed, which offers some significant advantages over conventional delay lines. The phase shifter is compact in size, ...
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Conference Object
Compact, wideband and multiband antennas based on metamaterial concepts
Antoniades, Marcos A.; Zhu, J.; Selvanayagam, M.; Eleftheriades, G. V. (2010)In this review article, various antenna designs that are based on metamaterial concepts are presented which have been developed at the University of Toronto. Specifically, several antennas that are based on the zero-index ...
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Conference Object
Conformai wearable monopole antenna backed by a compact EBG structure for body area networks
Antoniades, Marcos A.; Abbasi, M. A. B.; Nikolic, M.; Vryonides, P.; Nikolaou, S. (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
Antoniades, Marcos A.; Eleftheriades, G. V. (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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Article
Direct quadrature phase shift keying modulation using compact wideband six-port networks
Ibrahim, S. Z.; Abbosh, A. M.; Antoniades, Marcos A. (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
A Directivity-Band-Dependent Triple-Band and Wideband Dual-Polarized Monopole Antenna Loaded with a Via-Free CRLH Unit Cell
Jamilan, S.; Antoniades, Marcos A.; Nourinia, J.; Azarmanesh, M. N. (2015)A printed triple-band and wideband dual-polarized meander-line monopole antenna with a single CRLH metamaterial loading is presented. The metamaterial loading improves the impedance matching and causes the proposed antenna ...
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Conference Object
Dual-band dual-polarized antenna for medical applications
Rezaeieh, S. A.; Abbosh, A. M.; Antoniades, Marcos A.; Mustafa, S. (2013)The design of a coplanar waveguide fed antenna with dual polarization and dual-band operation is presented. The antenna operates in the Industrial, Scientific and Medical (ISM) bands. The design presented has linear ...
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Conference Object
Enabling electromagnetic applications of negative-refractive-index transmission-line metamaterials part II
Eleftheriades, G. V.; Antoniades, Marcos A.; Islam, R. (Institute of Electrical and Electronics Engineers Inc., 2004)The 1-Dimensional (1-D) metamaterial phase-shifting lines presented in [1] can be used to develop compact and broadband, non-radiating, metamaterial feed-networks for antenna arrays. These can be used to replace conventional ...
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Conference Object
Equivalent circuit model for finding the optimum frequency range for the detection of heart failure using microwave systems
Ahdi Rezaeieh, S.; Tan, Y. -Q; Abbosh, A. M.; Antoniades, Marcos A. (2013)A circuit model is used to estimate the useful frequency bands that can be used in a microwave system designed for heart failure detection. That detection is realized by monitoring the accumulation of fluids in lungs ...
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Article
A folded-monopole model for electrically small NRI-TL metamaterial antennas
Antoniades, Marcos A.; Eleftheriades, G. V. (2008)An improved model for analyzing electrically small NRI-TL antennas is proposed, that highlights the methods that enable these antennas to offer a good impedance match and a high radiation efficiency compared to previously ...
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Conference Object
Fully-printed NRI-TL metamaterial phase-shifting lines implemented in CPS technology
Antoniou, P.; Antoniades, Marcos A. (Institute of Electrical and Electronics Engineers Inc., 2016)Compact phase-shifting lines are presented that are based on negative-refractive-index transmission-line (NRI-TL) metamaterials and which are implemented using co-planar strip (CPS) technology. The metamaterial lines are ...