EE 30358

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EE 30358 Electromagnetic Fields and Waves II
Instructor Arpad I. CSURGAY 268 Fitzpatrick
Hall acsurgay_at_nd.edu
TA Timothy VASSEN
Textbook Magdy F. Iskander Electromagnetic
Fields and Waves Chapters 5 to 9
Electromagnetic Waves
Lectures Tuesday/Thursday 1100
-1215 DeBartolo 129
Problems roughly weekly Grading 30
problems 30 midterm 40 final
Dr. Arpad I. Csurgay is a Visiting Professor at
the EE Department - Center for Nano Science and
Technology, from Pazmany Peter Catholic
University, Budapest, Hungary, (Department of
Information Technology)
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ELECTROMAGNETIC WAVES
Gamma-rays
PHz
THz
GHz
MHz
kHz
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SOME IMPORTANT APPLICATIONS OF EM WAVES
RADIO, TELEVISION, TELEPHONY
WIRELESS RADIO, MOBILE PHONES
RADAR (Radio Detecting And Ranging)
RADIO ASTRONOMY
IMAGING, TELESCOPES, MICROSCOPES
MEDICAL IMAGING X-RAY, CT, NMR, fMRI, etc
OPTICS (Visible, Infrared, UV, Fiber Optics)
MATERIAL STUDIES
HIGH SPEED INTERCONNECTS (MULTI-CHIP TECHNOLOGIES)
SOLAR ENERGY HARVESTING
BIONIC (BI-ology electrONIC) applications
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Classical Physics The spacetime
bodyforce model
Geometrical space and time set the theater,
where a bodies are moved by forces.
Four fundamental notions space , time , body,
force
COLLISION (BODIES) VECTORIAL SUPERPOSITION
(FORCES) INTERFERENCE
Space and Time
Trajectory
Force in EM field
F, N, E V/m, q As, v m/s, B Vs/m2

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Coulomb-coupling on the nanoscale is STRONG.
Dipole Dipole Interaction
NATURE HAS BEEN HIDING ELECTROMAGNETIC FORCES
FOR THOUSENDS OF YEARS
MAN DID NOT KNOW THAT LIGHT IS EM WAVE
BODIES FROM OUTSIDE LOOKED LIKE NEUTRAL
EVERYDAY EXPERIENCE GRAVITY
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GRAVITATIONAL FORCE
ELECTROSTATIC FORCE
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MAXWELLS EQUATIONS
In free space (Vacuum)
Gausss Law for Electric Field
Gausss Law for Magnetic Field
Faradays Law
Amperes Law
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Example MOVING CHARGE
Solution of the Maxwells Equations for large
distances from Q
CHARGE ? ELECTRIC FIELD
MOVING CHARGE (CURRENT) ? ELECTRIC MAGNETIC
FIELD
ACCELERATING CHARGE (CURRENT) ?
ELECTROMAGNETIC RADIATION (EM WAVE)
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MAXWELLS EQUATIONS
In materials (simple materials)
The EM field INDUCES additional sources (charges
and currents), which also contribute to the EM
field by conduction ( ),
polarization ( ), and
magnetization ( ).
Gausss Law for Electric Field
Gausss Law for Magnetic Field
Faradays Law
Amperes Law
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Gausss Law for Electric Field
Charge is the source of D
Gausss Law for Magnetic Field
There is no source of B (vector-lines are
closed)
Faradays Law
Induced electric field (emf)
Amperes Law
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BOUNDARY CONDITIONS
CONTINUITY EQUATION
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ENERGY IN EM FIELDS
ENERGY DENSITY
LORENTZ FORCE (Mechanical force)
CONSERVATION OF ENERGY IN EM FIELDS
Power density emanating RADIATION
Total power generated by the sources
(batteries, generators, etc.)
Rate if increase of electric and magnetic stored
energy
Power dissipated
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EM energy stored in Volume V
Dissipation in conductors
Generators produce () or dissipate (-)
energy/unit time
Power leaves the volume through RADIATION
Poynting vector
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H
E
S E x H
THE EM WAVE CARRY ENERGY AND MOMENTUM
ENERGY AND MOMENTUM ARE CONSERVED !
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