Browsing by Author "Antoniades, Marcos A."
Now showing items 1-20 of 69
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Conference Object
Analysis of an off-broadside zero beam-squinting leaky-wave antenna using metamaterials
Kossifos, K. M.; Antoniades, Marcos A. (Institute of Electrical and Electronics Engineers Inc., 2016)It is shown that zero beam-squinting can be achieved in both series fed antenna arrays and leaky-wave antennas by employing two parallel-connected metamaterial transmission lines with equal positive group delays, but with ...
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Book Chapter
Antenna Applications of Negative Refractive Index Transmission-Line (NRI-TL) Metamaterials
Eleftheriades, G. V.; Antoniades, Marcos A. (wiley, 2007)One-dimensional (1D) and to a lesser extent two-dimensional negative refractive index transmission-line (NRI-TL) metamaterials and corresponding antenna applications have been presented. An expression for the total phase ...
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Conference Object
Antenna applications of negative-refractive-index transmission-line metamaterials
Antoniades, Marcos A.; Qureshi, F.; Eleftheriades, G. V. (2006)
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Article
Antenna applications of negative-refractive-index transmission-line structures
Eleftheriades, G. V.; Antoniades, Marcos A.; Qureshi, F. (2007)A number of new antenna-related applications that have recently been developed at the University of Toronto based on the concept of negative-refractive-index transmission-line metamaterials are reviewed. These include ...
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Conference Object
Applications of negative-refractive-index transmission-line (NRI-TL) metamaterials in planar antennas and their feed networks
Antoniades, Marcos A.; Eleftheriades, G. V. (2007)Negative-refractive-index transmission-line (NRI-TL) metamaterials and introduced and their fundamental properties are described. Following this, various applications using NRI-TLs are shown and their salient characteristics ...
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Conference Object
Arbitrary length zero-phase substrate integrated coaxial lines using NRI-TL metamaterials
Quddious, A.; Nikolaou, S.; Antoniades, Marcos A. (Institute of Electrical and Electronics Engineers Inc., 2017)Arbitrary-length zero-degree phase-shifting lines are presented at X-band that are based on negative-refractive-index transmission-line (NRI-TL) metamaterials implemented in substrate integrated coaxial line (SICL) technology. ...
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Article
Bandwidth and Directivity Enhancement of Loop Antenna by Nonperiodic Distribution of Mu-Negative Metamaterial Unit Cells
Rezaeieh, S. A.; Antoniades, Marcos A.; Abbosh, A. M. (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
Antoniades, Marcos A.; Rezaeieh, S. A.; Abbosh, A. M. (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
Antoniades, Marcos A.; Eleftheriades, G. V. (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
Antoniades, Marcos A.; Eleftheriades, G. V. (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 dual-mode monopole antenna using NRI-TL metamaterial loading
Antoniades, Marcos A.; Eleftheriades, G. V. (2009)A printed monopole antenna is proposed which uses negative-refractive-index transmission-line (NRI-TL) metamaterial loading in order to achieve a broadband dual-mode operation. The metamaterial-loaded monopole supports a ...
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Article
Broadband planar circularly polarised antenna for ultra-high frequency applications
Rezaeieh, S. A.; Abbosh, A. M.; Antoniades, Marcos A. (2014)A broadband circularly polarised (CP) antenna employing a deformed square loop radiator in combination with two spiraled monopoles is presented, for use in multiple ultra-high frequency applications. This combination of ...
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Article
A broadband series power divider using zero-degree metamaterial phase-shifting lines
Antoniades, Marcos A.; Eleftheriades, G. V. (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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Conference Object
Broadband UHF antenna for heart failure detection system
Ahdi Rezaeieh, S.; Abbosh, A. M.; Antoniades, Marcos A. (2013)A three-dimensional cavity backed coplanar waveguide fed ultra-high frequency (UHF) antenna is presented. The antenna is designed to operate in microwave system for heart failure detection. A parasitic cavity is used to ...
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Article
A broadband Wilkinson balun using microstrip metamaterial lines
Antoniades, Marcos A.; Eleftheriades, G. V. (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
Chairs' welcome message
Antoniades, Marcos A.; Skrivervik, A. (2015)
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Conference Object
A compact and broadband NRI-TL metamaterial
Antoniades, Marcos A.; Eleftheriades, G. V. (2009)A compact and broadband negative-refractive-index transmission-line (NRI-TL) metamaterial antenna is proposed,which consists of a conventional printed monopole loaded in a left-handed fashion. The metamaterial loading ...
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Article
A compact and low-profile metamaterial ring antenna with vertical polarization
Qureshi, F.; Antoniades, Marcos A.; Eleftheriades, G. V. (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
Ahdi Rezaeieh, S.; Abbosh, A. M.; Antoniades, Marcos A. (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
Antoniades, Marcos A.; Henin, B.; Abbosh, A. M. (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 ...