Metamaterial Enhanced Broadband Dipole Antenna with Selective Directivity and Enhanced Gain

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Naik, A. (2018). Metamaterial Enhanced Broadband Dipole Antenna with Selective Directivity and Enhanced Gain. Unc Charlotte Electronic Theses And Dissertations.
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Abstract

This research is aimed at investigating the interaction between a broadband dipole andmetamaterials. Metamaterials are artificial electromagnetic structures whose electricpermittivity and magnetic permeability can be engineered to have parameter valuesnot available naturally. Metamaterials are popular in modern day research due totheir interesting properties. The affect of using metamaterials to alter the directivityof the broadband dipole antenna is the focus of this work. Different metamaterialunit cells have been designed to be used as near field components to achieve selectivedirectivity and improved gain. The antenna and metamaterials are modeled in ANSYSHFSS, a full wave FEM electromagnetic solver. On achieving satisfactory resultsfrom the simulation of the bow tie antenna and metamaterial unit cell separately, theprocess is extended to the design of a bow tie antenna surrounded by a 4x5 array ofedge coupled split ring resonators also known as complementary split ring resonatorsthat exhibit negative permeability when excited by the axial magnetic field from theantenna. Unlike, the conventional dipole antenna with omni-directional propagationthe new antenna is designed to have directional propagation, and improved gain.

Details
Author

Naik, Ajay

Title

Metamaterial Enhanced Broadband Dipole Antenna with Selective Directivity and Enhanced Gain

Physical Description

1 online resource (91 pages) : PDF

Date

2018

Degree Granting Institution

University of North Carolina at Charlotte

Abstract

This research is aimed at investigating the interaction between a broadband dipole andmetamaterials. Metamaterials are artificial electromagnetic structures whose electricpermittivity and magnetic permeability can be engineered to have parameter valuesnot available naturally. Metamaterials are popular in modern day research due totheir interesting properties. The affect of using metamaterials to alter the directivityof the broadband dipole antenna is the focus of this work. Different metamaterialunit cells have been designed to be used as near field components to achieve selectivedirectivity and improved gain. The antenna and metamaterials are modeled in ANSYSHFSS, a full wave FEM electromagnetic solver. On achieving satisfactory resultsfrom the simulation of the bow tie antenna and metamaterial unit cell separately, theprocess is extended to the design of a bow tie antenna surrounded by a 4x5 array ofedge coupled split ring resonators also known as complementary split ring resonatorsthat exhibit negative permeability when excited by the axial magnetic field from theantenna. Unlike, the conventional dipole antenna with omni-directional propagationthe new antenna is designed to have directional propagation, and improved gain.

Genre

masters theses

Subjects--Topics

Electromagnetism

Degree

M.S.

Keywords

Bow Tie
Broadband Dipole
Metamaterials
Split Ring Resonator

Subject Area

Electrical Engineering

Advisor(s)

Adams, Ryan

Committee Members

Weldon, Thomas
Han, Tao

Degree Note

Thesis (M.S.)--University of North Carolina at Charlotte, 2018.

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Rights Holder Information

Copyright is held by the author unless otherwise indicated.

Identifier

Naik_uncc_0694N_11614

Permalink

http://hdl.handle.net/20.500.13093/etd:162