Metamaterial Devices
Rubaiyat IslamThe Edward S. Rogers Sr. Dept. of Electrical & Computer Engineering,
University of Toronto, Toronto, ON
Introduction
Shelby, Smith Science (April 2001)
BoeingPhysics Today (June 2004)
Parker, CharltonPhysics Web (Aug 2000)
Metamaterial/Photonic Crystal:
Artificial medium tailored for specific Electromagnetic properties by periodically altering the composition of a host dielectric.
Introduction
Negative-Refractive-Index (NRI) Metamaterials.
E
H
k
S
E
HkS
> 0, > 0 < 0, < 0 (Right-handed) (Left-handed)
> 0
> 0
d
< 0
< 0
Metamaterial Devices
20.12 mm
8.70 mm
Compact phase shifters
Inter-digital capacitor
Plated via to ground
Compact Branchline Coupler72 % size reduction
Metamaterial Devices
3dB coupler prototype
High Coupling edge-coupledcoupler (3dB Power splitter implementation)
High Directivity (over 40 dB) and high isolation (over 70 dB) coupler
MS/NRI balun for microstrip to coplanar strip transition
Leaky wave backfire antenna (Grbic 2002)
Compact Low profile antenna with vertical polarization (Qureshi, Antoniades 2005)
Sub-diffraction imaging microwaveLens (Grbic 2003)
Broadband, zero degree phase, power divider (Antoniades 2005)
Summary
1. Theory of Negative-Refractive-Index material synthesis, experimental verification and device fabrication/testing
2. Ongoing work: Frequency selective surfaces, plasmonic metamaterials and waveguides, superluminal pulse propagation, electronically tunable phase shifters … etc
3. Future work: Compact low-loss highly selective filters, compact diplexer, evanescent wave filter … etc