Bandwidth and Directivity Enhancement of Loop Antenna by Nonperiodic Distribution of Mu-Negative Metamaterial Unit Cells
dc.contributor.author | Rezaeieh, S. A. | en |
dc.contributor.author | Antoniades, Marcos A. | en |
dc.contributor.author | Abbosh, A. M. | en |
dc.creator | Rezaeieh, S. A. | en |
dc.creator | Antoniades, Marcos A. | en |
dc.creator | Abbosh, A. M. | en |
dc.date.accessioned | 2019-04-08T07:48:08Z | |
dc.date.available | 2019-04-08T07:48:08Z | |
dc.date.issued | 2016 | |
dc.identifier.uri | http://gnosis.library.ucy.ac.cy/handle/7/44779 | |
dc.description.abstract | 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 on the loop structure, the amplitude of the surface current can be modified in a desired section of the loop, and hence, unidirectional radiation is achievable at the mu-zero resonance frequency. Moreover, it is demonstrated that as a result of the capacitive MNG loading, a 90° phase difference occurs between the vertical arms of the loop. Therefore, its radiation mechanism can be characterized as an array of two dipole antennas positioned a quarter wavelength apart, thus creating unidirectional radiation. To further improve the performance of the antennas, a quarter-wavelength strip is located in the vicinity of the loop to act as a resonator and director at higher frequencies. With the proposed structure, the final design is at least 50% smaller, in terms of the occupied area, than recent antenna designs of conventional loops, MNG loaded loops, and loop-dipole composite antennas. It also achieves a wide fractional bandwidth of 52% from 0.64 to 1.1 GHz, which is 50% wider than recent MNG metamaterial unit cell loaded loops, with a measured peak front-to-back-ratio and gain of 13 dB and 4.8 dBi, respectively. © 2016 IEEE. | en |
dc.source | IEEE Transactions on Antennas and Propagation | en |
dc.source.uri | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84981180114&doi=10.1109%2fTAP.2016.2574878&partnerID=40&md5=3d2a0e66921f71287e4e288be2f96ac6 | |
dc.subject | Antennas | en |
dc.subject | Metamaterial antennas | en |
dc.subject | Metamaterials | en |
dc.subject | Microwave antennas | en |
dc.subject | Bandwidth | en |
dc.subject | Antenna arrays | en |
dc.subject | Dipole antennas | en |
dc.subject | Directive antennas | en |
dc.subject | Mu-negative | en |
dc.subject | Mu-zero resonance (mzr) antenna | en |
dc.subject | Cells | en |
dc.subject | Cytology | en |
dc.subject | Fractional bandwidths | en |
dc.subject | Front to back ratio | en |
dc.subject | Loop antennas | en |
dc.subject | Metamaterial antenna | en |
dc.subject | Mu-negative (mng) transmission line | en |
dc.subject | Quasi-yagi antenna | en |
dc.subject | Unidirectional loop | en |
dc.subject | Directivity enhancement | en |
dc.subject | Loop antenna | en |
dc.subject | Dipole antenna | en |
dc.subject | Radiation mechanism | en |
dc.subject | Resonance frequencies | en |
dc.title | Bandwidth and Directivity Enhancement of Loop Antenna by Nonperiodic Distribution of Mu-Negative Metamaterial Unit Cells | en |
dc.type | info:eu-repo/semantics/article | |
dc.identifier.doi | 10.1109/TAP.2016.2574878 | |
dc.description.volume | 64 | |
dc.description.issue | 8 | |
dc.description.startingpage | 3319 | |
dc.description.endingpage | 3329 | |
dc.author.faculty | Πολυτεχνική Σχολή / Faculty of Engineering | |
dc.author.department | Τμήμα Ηλεκτρολόγων Μηχανικών και Μηχανικών Υπολογιστών / Department of Electrical and Computer Engineering | |
dc.type.uhtype | Article | en |
dc.source.abbreviation | IEEE Trans Antennas Propag | en |
dc.contributor.orcid | Antoniades, Marcos A. [0000-0002-9699-2387] | |
dc.gnosis.orcid | 0000-0002-9699-2387 |
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