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Received: 2011-08-20

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Journal of Zhejiang University SCIENCE C 2012 Vol.13 No.5 P.365-375

http://doi.org/10.1631/jzus.C1100239


A novel frequency-selective metamaterial to improve helix antenna


Author(s):  Iraj Arghand Lafmajani, Pejman Rezaei

Affiliation(s):  Department of Electrical and Computer Engineering, Semnan University, Semnan, Iran

Corresponding email(s):   irajarghand@gmail.com, prezaei@semnan.ac.ir

Key Words:  Antenna efficiency, Negative permittivity, Negative permeability, Helix antenna, Metamaterial


Iraj Arghand Lafmajani, Pejman Rezaei. A novel frequency-selective metamaterial to improve helix antenna[J]. Journal of Zhejiang University Science C, 2012, 13(5): 365-375.

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author="Iraj Arghand Lafmajani, Pejman Rezaei",
journal="Journal of Zhejiang University Science C",
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pages="365-375",
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publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.C1100239"
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A1 - Pejman Rezaei
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Abstract: 
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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Reference

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