electromagnetics by t.h.huang
TRANSCRIPT
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T.H.HuangT.H.Huang
Electromagnetics (I)
Welcome to this course Electromagnetics (I)
What we will learn in this course?
•Overview of Electromagnetics
•Review of Complex Number, Phasor,
and Vector Algebra/Analysis
•Static Electric Fields
•Static Magnetic Fields
•Dynamic Fields (time-varying)
•Plane Waves
•Introduction to Transmission Lines
ClassicElectromagnetics
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T.H.Huang
What is Electromagnetics?
Electromagnetics –The study of the effects of electric charges
at rest (static fields)
and
in motion. (dynamic fields)
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What is the subject of Electromagnetics to learn?
tD
JH
tB
E
0B
ρD
:Equations'
v
sMaxwell
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T.H.Huang
Textbook & Recommendations
Textbook : “Elements of Electromagnetics,”(5th Int. Edition)
Matthew N.O. Sadiku,2011 Oxford University Press, New York, Oxford
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T.H.Huang
Textbook - 2 : “Field and Wave Electromagnetics,”(2nd Edition)
David K. Cheng,1989 Addison-Wesley Publishing Company, Inc.
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Ref #1 : “Electromagnetics with Applications,”(5th Edition)Kraus / Fleisch,1999 McGRAW-Hill Companies
Textbook & Recommendations
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T.H.Huang
Ref. #2 : “Engineering Electromagnetics,”(2nd Edition)Nathan Ida,2004 Springer-Verlag New York, LLC
Textbook & Recommendations
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Ref. #3 : “Engineering Electromagnetics”(7th edition)William H. Hayt, Jr. and John A Buck,International Edition 2006.
Textbook & Recommendations
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T.H.Huang
Textbook & Recommendations
Ref. #4 : “Electromagnetics for High-Speed Analog andDigital Communication Circuits,”Ali M. Niknejad,2007 CAMBRIDGE UNIVERSITY PRESS
(進階應用課本)
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課外書 -1 : “A Student’s Guide to Maxwell’s Equations,”by Daniel Fleisch,台大物理系名譽教授 鄭以禎 譯,天下文化出版社,2010.
(科普讀物)
Textbook & Recommendations
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T.H.Huang
Textbook & Recommendations
課外書 -2 : “Nature’s Numbers: The Unreal Reality ofMathematics”,Ch.5, by Ian Stewart, 葉李華 譯,
天下文化出版社,2010.(科普讀物)
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Contents in the Textbook for the first semester :
Ch1 - 2. Vector Algebra, Coordinate Systems and Transformations
Ch3. Vector Calculus
Ch4 - 5. Electrostatic Fields; Electric Fields in Material Space
Ch6. Electrostatic Boundary-Value Problems
Ch7. Magnetostatic Fields
Ch8. Magnetic Forces, Materials, and Devices
Ch9. Maxwell’s Equations
Ch10. Electromagnetic Wave Propagation
Ch11. Transmission Lines
Textbook Contents
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Contents in the Textbook - 2 for the first semester :
Ch1. The Electromagnetic Model
Ch2. Vector Analysis
Ch3. Static Electric Fields
Ch4. Solution of Electrostatic Problem
Ch5. Steady Electric Currents
Ch6. Static Magnetic Fields
Ch7. Time-Varying Fields and Maxwell’s Equations
Ch8. Plane Electromagnetic Waves
Ch9. Theory and Applications of Transmission Lines
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Topics in Electromagnetics (I):
1. Introduction : Model / Units / Demands / Complex Numbers / Phasor
2. Vector Analysis : Products of Vectors / Divergence / Curl / Coordinates
3. Static Electric Fields : Charge / E-field / Gauss’s Law / Capacitance
4. Static Magnetic Fields : Current / M-Field / Ampere’s Law / Inductance
5. Time-Varying Fields : E-Filed M-Field / Maxwell’s Equations
6. Plane Electromagnetic Wave : EM propagation in Space and Media
7. Transmission Lines : EM propagation confined by Conductor
/ Smith Chart / Matching
Topics in This Course
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Topics in Electromagnetics (II):
1. Plane Electromagnetic Wave
2. Transmission Lines
3. Waveguides and Cavity Resonators : EM Boundary Problems
4. Antennas and Radiating Systems : Antenna
Topics in This Course
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An Overview - What we will learn?
3 coordinate systems : Cartesian, Cylindrical, and Spherical
Vector algebra : dot product (.),cross product (x), right-hand rulegradient operation (▽),
divergence theorem (▽.),Stokes’s theorem (▽x),Helmholtz’s theorem.
0. Vector Algebra:
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B. Magnetostatics :
Biot-Savart’s Law : H (magnetic field intensity) I (current)
A. Electrostatics :
Gauss’s Law : D (electric flux density, =εE) Q (charge)
Coulomb’s Law : E (e-field intensity, =F/q, ) Q (charge)
Ampere’s circuital Law : H (magnetic field intensity, =B/μ) I (current)
An Overview - What we will learn?
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C. Time-Varying (Dynamic) Fields :
Current Continuity Equation:t
vρJ
Faraday’s Law :t
BE
(postulate) Time-varying
An Overview - What we will learn?
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C. Dynamic Fields : (cont.)
Maxwell’s Equations : (the most important one!)
Drop out the time-varying terms, then you get the static fields relations!
An Overview - What we will learn?
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D. Plane Waves :
Time-Harmonic Wave Equations
Wave propagation in lossless/lossy media (dielectric, conductor)
Electromagnetic Power and Poynting Theorem
HEP
(W/m2, Poynting vector, flowing out)
V σV meS
dvpdvwwt
sdP
EM energy density Omic power densityPowerflowing into the surface
An Overview - What we will learn?
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E. Transmission Lines :
Time-Harmonic Transmission-Line Equations
Characteristic Impedance: Zo
An Overview - What we will learn?
< in 電磁學觀點?>
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E. Transmission Lines : (cont.)
Microstrip Line(on the PCB applications)(on the Si-wafer appications)
Smith Chart (Z-/G-type)
An Overview - What we will learn?
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The Course Schedule
month Week # content Teaching Test Homework
09 01 Ch1/Ch2 1+1 hr
03 Ch2/3 1+2 hr quiz * HW#102 Ch2 1+2 hr
04 Ch3 1+2 hr
07 Ch4 1+2 hr quiz *06 Ch3/4 1+2 hr HW#2
09 Ch5 1+2 hr08 Ch4/5 1+2 hr HW#3
10 Ch5/6 1 hr mid. 2hr HW#411 Ch6 1+2 hr quiz *
13 Ch6/7 1+2 hr HW#512 Ch6 1+2 hr
15 Ch7 1+2 hr quiz *14 Ch7 1+2 hr
17 Ch8 1+2 hr16 Ch8 1+2 hr HW#6
18 Final 3hr
10
11
12
01
05 Ch3 1+2 hr mid. 2hr
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Scoring :
Homework (+ Quiz ) : HW’s (average) + Quiz (random)
Mid. Test #1 : * 2hr-test
Mid. Test #2 : * 2hr-test
Final Test : * 2hr-test
Others : roll call
Subtotal : 100%
Scoring
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T.H.Huang
ftp site: http://140.116.187.6(or http://ganymede.ee.ncku.edu.tw)
/開授課程/電磁學
username : guestpasswd : guest01
Download file : for example, em_01x.ppt
Part of the lectures will be updated during the semester.
Lecture Download
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Demonstration
Illustration of Divergence/Curl Concepts
Source: http://www.falstad.com/vector3d/directions.html
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Demo Example : a TEM wave (plane wave)
[source]: http://ocw.mit.edu/OcwWeb/ © 2003 MIT
Demonstration
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Demo Ex : Waveguide Example (T-Junction, by HFSS-V9)
Zero Offset 2um Offset
[the end]
Demonstration