

FOLLOWUS
Department of Electrical and Computer Engineering, Semnan University, Semnan, Iran
[ "Iraj ARGHAND LAFMAJANI, irajarghand@gmail.com" ]
[ "Pejman REZAEI, prezaei@semnan.ac.ir" ]
Received:20 August 2011,
Revised:2012-;4-13,
Published:2012-05
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Iraj ARGHAND LAFMAJANI, Pejman REZAEI. A novel frequency-selective metamaterial to improve helix antenna[J]. Frontiers of Information Technology & Electronic Engineering, 2012, 13(5): 365-375.
Iraj ARGHAND LAFMAJANI, Pejman REZAEI. A novel frequency-selective metamaterial to improve helix antenna[J]. Frontiers of Information Technology & Electronic Engineering, 2012, 13(5): 365-375. DOI: 10.1631/jzus.C1100239.
A novel frequency-selective metamaterial with negative permittivity and permeability for improving directivity and gain of a helix antenna is presented in this paper. The proposed metamaterial is composed of two Z-shape resonators printed on opposite sides of a dielectric substrate. Two forms of multilayered cells are found to be suitable for antennas and waveguides applications. In addition
a new method of designing a metamaterial-based helix antenna is presented with high directivity and gain. A comparison on radiation properties is given between the conventional and the new metamaterial-based helix antennas. Two comparisons on radiation properties are performed: (1) the effect of proposed Z-structure on monopole
dipole
and helix antennas; (2) the effect of OE3
split-ring resonator (SRR)
and proposed Z-structure unit cells on the performance of helix antennas. The results show improvement of parameters such as directivity
gain
and radiation power of the new metamaterial-based helix antenna. Therefore
the combination of Z-structure with the helix antenna shows the best performance.
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