Metamaterials : Critique and Alternatives

by Benedikt A. Munk (The Ohio State Univ., USA)

• ISBN13: 9780470423868
• ISBN10: 0470423862
• Format: eBook
• Copyright: 2009-02-01
• Publisher: Wiley-Interscience

Summary

Metamaterials are a new class of ordered composites that exhibit exceptional properties not readily observed in nature. In Metamaterials, Professor Munk, a leading expert on periodic structures, denies the existence of negative refraction and provides convincing alternative explanations involving surface waves to some of the experimental examples of metamaterials in the literature. While the debate on this subject is just starting, Professor Munk's arguments should be the catalyst to much healthy discussion amongst researchers and graduate students in electromagnetics, antenna theory, materials research, and chemistry.

Table of Contents

Foreword

Preface

Why Periodic Structures Cannot Synthesize Negative Indices of Refraction.

Introduction

What Currently is Assumed about VeselagoÆs Medium

Fantastic Designs Could be Realized if VeselagoÆs Material Existed

How VeselagoÆs Medium is Envisioned to be Synthesized Using Periodic Structures

How Does A Periodic Structure Refract

On the Field Surrounding an Infinite Periodic Structure of Arbitrary Wire Elements Located in One or More Arrays

On Increasing "Evanescent" Waves: a Fatal Misconception

Preliminary Conclusion: Synthesizing VeselagoÆs Medium by a Periodic Structure Is Not Feasible

On Transmission Line Dispersion: Backward Traveling Waves

Regarding VeselagoÆs Conclusion: are There Deficiencies?

Conclusions

Common Misconceptions

References

On Cloaks and Reactive Radomes.

Cloaks

Reactive Radomes

Common Misconceptions

Concluding Remarks

References

Absorbers with Windows: Absorb at Some Frequencies While Transparent at Others. also Rasorbers.

Introduction

Statement of the Problem

Concept

Conceptual Designs

Extension to Arbitrary Polarization

The High Frequency Band

Complete Conceptual Rasorber Design

Practical Designs

Other applications of traps: multiband arrays

References

On Designing Absorbers for Oblique Angle of Incidence.

LagarkovÆs and Classical Designs

The Salisbury Screen

Scan Compensation

Frequency Compensation

The Circuit Analog Absorbers

Other Designs: Comparison and Discussion

Conclusion

References

The Titan Antenna: An Alternative to Magnetic Ground Planes.

Introduction

Layout of the Antenna

On Double-Band Matching in General

Matching of the Sleeve Elements

Further Matching: The Main Distribution Network

The Balun

The Radiation Pattern

Something that Sounds Too Good To Be True, It Usually Is!

Efficiency Measurements

A Common Misconception

We Put the magnetic Ground Plane to Rest!

Conclusions

References

Summary and Concluding Remarks.

Background

The Features of VeselagoÆs Material

What Can a Periodic Structure Actually Simulate?

Did Veselago Choose the Wrong Branch Cut?

Could we Ever Have a Negative Index of Refraction?

Could Veselago Have Avoided the Wrong Solution?

So What Came Out Of It?

Is Publishing the Ultimate Goal in Scientific Research?

What Excites a Scientist?

How Far Have We Gone in Our Self-Deception?

But DidnÆt Anyone Suspect Anything?

How Realistic Are Small Arrays?

References

The Paper Rejected in 2003

A.1. Comments Written in 2007 Concerning My Rejected Paper Submitted in 2003

A.2. The Paper Rejected in 2003

B.1. Introduction

B.2. Design 1

B.3. Design 2

B.4. Development of Design 2b

B.5. Conclusion

References

How to Measure the Characteristic Impedance and Attenuation of a Cable

C.1. Background

C.2 Input Connector Effect

C.3. Do the Formulas Hold in the Smith Charts?

C.4. How to Measure the Cable Loss

Reference

Can Negative Refraction be Observed Using a Wedge of Lossy Material?

ntroduction

efraction for Planar Slabs

edge Shaped Dielectric

symmetric Aperture Distributions in General

onclusion

References

Index

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