Electromagnetics by T.H.huang
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Transcript of Electromagnetics by T.H.huang
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
T.H.Huang
What is Electromagnetics?
Electromagnetics –The study of the effects of electric charges
at rest (static fields)
and
in motion. (dynamic fields)
T.H.Huang
What is the subject of Electromagnetics to learn?
tD
JH
tB
E
0B
ρD
:Equations'
v
sMaxwell
T.H.Huang
Textbook & Recommendations
Textbook : “Elements of Electromagnetics,”(5th Int. Edition)
Matthew N.O. Sadiku,2011 Oxford University Press, New York, Oxford
T.H.Huang
Textbook - 2 : “Field and Wave Electromagnetics,”(2nd Edition)
David K. Cheng,1989 Addison-Wesley Publishing Company, Inc.
T.H.Huang
Ref #1 : “Electromagnetics with Applications,”(5th Edition)Kraus / Fleisch,1999 McGRAW-Hill Companies
Textbook & Recommendations
T.H.Huang
Ref. #2 : “Engineering Electromagnetics,”(2nd Edition)Nathan Ida,2004 Springer-Verlag New York, LLC
Textbook & Recommendations
T.H.Huang
Ref. #3 : “Engineering Electromagnetics”(7th edition)William H. Hayt, Jr. and John A Buck,International Edition 2006.
Textbook & Recommendations
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)
T.H.Huang
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
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)
T.H.Huang
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
T.H.Huang
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
T.H.Huang
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
T.H.Huang
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
T.H.Huang
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:
T.H.Huang
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?
T.H.Huang
C. Time-Varying (Dynamic) Fields :
Current Continuity Equation:t
vρJ
Faraday’s Law :t
BE
(postulate) Time-varying
An Overview - What we will learn?
T.H.Huang
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?
T.H.Huang
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?
T.H.Huang
E. Transmission Lines :
Time-Harmonic Transmission-Line Equations
Characteristic Impedance: Zo
An Overview - What we will learn?
< in 電磁學觀點?>
T.H.Huang
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?
T.H.Huang
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
T.H.Huang
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
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
T.H.Huang
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
T.H.Huang
Demo Ex : Waveguide Example (T-Junction, by HFSS-V9)
Zero Offset 2um Offset
[the end]
Demonstration