Electromagnetic Shielding: 1st Edition (Hardback) book cover

Electromagnetic Shielding

1st Edition

By Kenneth L. Kaiser

CRC Press

336 pages | 100 B/W Illus.

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Hardback: 9780849363726
pub: 2005-09-13
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In chapters culled from popular and critically acclaimed Electromagnetic Compatibility Handbook, Electromagnetic Shielding provides a tightly focused, convenient, and affordable reference for those interested primarily in this subset of topics. Author Kenneth L. Kaiser demystifies shielding and explains the source and limitations of the approximations, guidelines, models, and rules-of-thumb used in this field. The material is presented in a unique question-and-answer format that gets straight to the heart of each topic. The book includes numerous examples and uses Mathcad to generate all of the figures and many solutions to equations. In many cases, the entire Mathcad program is provided.


"If you do not already own the Electromagnetic Compatibility book, this is a must have for those who design shielding. It provides the basic equations for a wide variety of shielding designs and field conditions."

– John J. Shea, in IEEE Electrical Insulation Magazine, Jan/ Feb 2008, Vol. 24, No. 1

Table of Contents

Plane Wave Shielding

The "Magic" of Shielding Waves Revealed

The Impedance of a Wave

Impedance of Air, Real Metals, and Real Insulators

Reflection and Transmission Coefficients

Plane Wave Power

Single-Layer Conducting Shield

Thin Shields and Reflection Loss

Thick Shields and Absorption Loss

Skin Depth

Skin Depth for Good Insulators

Skin Depth for Several Good Metals

Complex Permittivity and RF Through Human Fat

Microwaves through Human Fat

Table of Dielectric Constants and Loss Tangents

Loss in dB Per Skin Depth

Reflection, Absorption, and Multiple-Reflection Losses

Effect of Dielectric Constant on Shielding

Near Field or Far Field?

Wave Impedance

Electric Field Shielding

The "Magic" of Electric Field Shielding Revealed

Size is Important!

Shielding Reciprocity?

Using Capacitance to Model Shielding

Capacitor Shielding

Three-Terminal Capacitor

Shielding Cans

Finite-Conductivity Spherical Bodies

Step Response of Spherical Bodies

Finite-Conductivity Cylindrical Body

Electric Blankets and Infants

Typical Electric Field Strengths

Current Through and Voltage Across a Field-Immersed Person

Insulating Spherical Shields

Insulating Cylindrical Shields

EQS and Perfect Conductors

Magnetic Field Shielding

The "Magic" of Magnetic Field Shielding Revealed

Magnetic Field from Simple Current Distributions

Magnetic Fields for Other Current Distributions

Magnetic Field Boundary Conditions

Flux Shunting Explained via Boundary Conditions

Self Shielding Nature of Coax

Method of Images for Currents

Wire Partners Can Reduce Fields

Thick Poor Conductors

Thin Good Conductors

Spherical and Cylindrical Conducting and Magnetic Shields

Pure Magnetic Spherical Shell

Pure Magnetic Cylindrical Shell

Finite-Length Cylindrical Shell

Shielding the Source and Shielding Reciprocity

Shielding a Cosmetologist with a Body Suit

Power Line Shielding via Burying

Wave Impedance Concept

Flat Shielding of Current-Carrying Loops

Grounding Shields

Cheap Shielding

Nonideal Shapes

Reducing the Magnetic Coupling Between Inductors

Typical Magnetic Flux Densities

MQS and Perfect Conductors

Decoupled Time-Varying Electric and Magnetic Fields

Additional Shielding Concepts

When Is a Shield Flat?

Performance of a Shielded Room

Laminated Shields

Shields with an Air Gap

Gold Coating on Glass

Laminates for Magnetic Fields

Rust Never Sleeps-Corrosion

Surface Impedance

Voltage and Current along a Chassis

Impedance of Coated Conductors

Nontraditional Shielding Materials

Shielding Effectiveness vs. Surface Resistance

Near-Field Electric Shielding Effectiveness

An Equipotential Surface

Electric vs. Magnetic Field Measurements

Single-Conductor Transmission Line

TEM, TE, and TM Waves

Cutoff Frequency of a Waveguide

Attenuation Beyond Cutoff

Seepage through a Seam

One Large Hole vs. Several Smaller Holes

Honeycomb Ventilation Openings

Coupling through an Aperture

Radio in a Metal Box

Lightning Protection Inside an Automobile

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