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Browsing by Subject "Metamaterial antennas"

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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 ...

    • 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 ...

    • 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 ...

    • 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 ...

    • 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 ...

    • 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 ...

    • 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 ...

    • 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 ...

    • 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 ...

    • 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 ...

    • Article  

      Gain Enhancement of Wideband Metamaterial-Loaded Loop Antenna with Tightly Coupled Arc-Shaped Directors 

      Ahdi Rezaeieh, S.; Antoniades, Marcos A.; Abbosh, A. M. (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 ...

    • Article  

      Miniaturization of Planar Yagi Antennas Using Mu-Negative Metamaterial-Loaded Reflector 

      Ahdi Rezaeieh, S.; Antoniades, Marcos A.; Abbosh, A. M. (2017)
      A technique to reduce the size and enhance the operating bandwidth (BW) of planar Yagi antennas, while maintaining their unidirectional radiation characteristics, is proposed in this paper. In this technique, the reflector ...

    • Conference Object  

      A zero beam-squinting leaky-wave antenna using NRI-TL metamaterials 

      Kossifos, K. M.; Antoniades, Marcos A. (Institute of Electrical and Electronics Engineers Inc., 2015)
      A planar zero beam-squinting leaky-wave antenna is proposed at 5 GHz, consisting of a periodic arrangement of negative-refractive-index transmission-line (NRI-TL) metamaterial unit cells. The antenna is centre-fed through ...

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