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