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Design of A Fully-printed Bi-planar Volumetric Negative-Refractive-Index Transmission-Line Metamaterial

  • Author / Creator
    Nguyen, Hoang Linh
  • Since the first experimental demonstration of the negative-refractive-index metamaterial by Shelby et al. in the early 2000s, metamaterials have experienced great interest from research community, resulting in an increasingly large number of publications. Truly three-dimensional (3D) metamaterials, which are able to interact with electromagnetic sources from free space, have been targeted in much of metamaterial research. The physical implementation of such structures is often exorbitantly complicated. In some applications, which require free-space sources to be particularly polarized, 3D metamaterials can be replaced by volumetric metamaterials, which are an extension of 2D metamaterials in the third dimension, and are realized by stacking layers of 2D metamaterials. Volumetric metamaterials employ both surface-mount and fully-printed elements as reactive loads. Fully printed volumetric metamaterials are the most cost-effective because their fabrication is suitable for standard lithography processes. However, previous fully-printed structures suffered from weak reactive loads, resulting in a high operation frequency, hence, a large electrical length per unit cell. This thesis presents a bi-planar design utilizing MIM-type capacitors and dual-arm spiral inductors, which can easily be fabricated with normal printed-circuit-board technology, making it low-cost. The proposed structure operates at 4.4 GHz, resulting in a small electrical length of one eleventh of free-space wavelength. The simulated data show that the structure can be treated as an isotropic effective medium possessing effective permittivity, permeability, and refractive index close to negative unity. The metamaterial may find applications as flat lenses in microwave hyperthermia, and in the improvement of antenna performance.

  • Subjects / Keywords
  • Graduation date
    2014-06
  • Type of Item
    Thesis
  • Degree
    Master of Science
  • DOI
    https://doi.org/10.7939/R3833N66Z
  • License
    This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.
  • Language
    English
  • Institution
    University of Alberta
  • Degree level
    Master's
  • Department
    • Department of Electrical and Computer Engineering
  • Specialization
    • Photonics and Plasmas
  • Supervisor / co-supervisor and their department(s)
    • Iyer, Ashwin (Electrical Engineering)
  • Examining committee members and their departments
    • Daneshmand, Mojgan (Electrical Engineering)
    • De Zanche, Nicola (Oncology)