Transcript Lecture slides

EE 372: Engineering
Electromagnetics II
Spring 2015
EM “Common Sense” Test
10 minutes
Instructor Information
Zhengqing (ZQ) Yun
Hawaii Center for Advanced Communications (HCAC)
Office: POST 201B
Phone: 6-0759
Email: [email protected]
http://www-ee.eng.hawaii.edu/~zqyun/courses/ee37215.html
Times and Location

Monday, Wednesday, and Friday
12:30 - 1:20pm
Jan. 12 ~ May 6, 2105 (Instruction period)
 Holidays: 1/19 (Mon.), 2/16 (Mon.), 4/3 (Fri.);
Spring break: 3/23 ~ 3/27; 44 hours total
 Location: POST 127
Prerequisites
EE 371, PHYS 274, or instructor approval
Office Hours

1:30 - 2:30pm, M, W, F
 By appointment
 Just walk in my office or email me
Grading

Homework: 30%
 Two midterms: 40%
 Final exam: 30%
 Extra points are possible
Textbooks
Electromagnetic Fields and Waves (required)
Magdy F. Iskander, Waveland Press,
ISBN: 1-57766-115-X
Electromagnetic Waves (optional)
D. H. Staelin, et al, Prentice Hall, 1994
ISBN: 0-13-225871-4
You are encouraged to read other EM books and
papers.
Contents
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Introduction (L01)
Brief review of principles of
wave motion (L02)
 Transverse Waves
 Longitudinal Waves
 Plane Waves, Cylindrical
Waves, Spherical Waves
Brief review of Maxwell's
Equations (L03)
 Faraday's Law, Ampere's
Law, Gauss' Laws
 Electromagnetic Waves
 The Electromagnetic
Spectrum
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Wave equation and plane wave
solution (L04~06):
 Harmonic wave equation in
free space
 Plane wave solution
 Wave front and propagation
direction
 Plane wave propagating in
arbitrary direction
Vector property of EM waves:
polarization (L07~09)
 TEM waves
 Linear polarization
 Other polarizations
 Maxwell equations without
del operator 𝛻
Contents

Laws of reflection and refraction
(L10~12):
 Fermat’s principle
 Derivation of law of
reflection
 Derivation of law of
refraction (Snell’s law)
 Other methods for deriving
the laws
 Boundary conditions
revisited
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Reflection and transmission
coefficients (L13~14):
 Boundary conditions and
polarization
 Reflection coefficient
 Transmission coefficient
Total Reflection and Total
Transmission (L15~16):
 Total reflection; critical
angle
 Total transmission: Brewster
(polarization) angle
First midterm (L17~19)
Contents
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Total field: incident + reflection
on a PEC plane (L20~22):
 Perpendicular polarization
 Parallel polarization
 Standing/propagating waves
 Concept of phase velocity
 Boundary conditions and the
uniqueness theorem
Two-plate waveguide
(L23~25):
 Field expressions/structures:
result of multiple reflections
 Concept of modes
 Cut-off frequency
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Rectangular waveguide (WG)
(L26~28):
 Boundary value problems
 Separation of variables
solution method
 Possible modes in a
rectangular waveguide
 Concept of WG wavelength
 Concept of WG impedance
Other boundary value problems
(L29~30):
 Rectangular resonators
 Circular waveguides
Second midterm (L31~33)
Contents
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Introduction to Antennas
(L34~41):
 Radiation of a current
element
 Far and near field
 Radiation pattern
 Directivity and gain
 Dipole Antennas
 Linear Antenna Arrays
 Ground effect (Image
Method)
Review for final (L42~44)
Final: Monday, May 11,
12:00pm ~ 2:00pm
Computer Animations &
Simulations
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EM waves are not easy to be observed
 Computers are available on campus/at home
 Animations and simulations can explain
subtle concepts and reveal physical insight
Theory + Experiment + Simulation
Course objectives

Understanding fundamental concepts and
laws governing the electromagnetic waves
 Understanding the mathematical formulation
of these laws
 Learning basic problem-solving skills and
research procedures
Homework and exams

Homework. You need to use all your learned
knowledge and skills to solve the problems.
All the steps should be clearly presented in
the solutions. Calculators and/or computers
are needed.
 Exams are testing your fundamental
understanding of the subject. Numerical
calculation is minimal. No calculators and
computers are needed.
Tips for Getting an A+

Attend all lectures
 Concentrate on EM stuff in classroom
 Learn problem solving skills from your
peers; don’t copy their work
 Ask questions when you have any, not only
in classroom, but also awat
 Participate classroom discussions
You Can Get Extra Points!

Solving challenge problems
 Doing extra homework
 Sharing news related to EM
 Finding mistakes in lectures and textbooks