field & wave electromagnetics 电磁场与电磁波cms.szu.edu.cn/emc/ppt/1&2.pdf · text...

Field & Wave Electromagnetics 电磁场与电磁波

（双语教学）

深圳大学信息工程学院通信工程系

何业军

副教授

Email: heyejun@126.com

Introduction• Text Book:

Field and Wave Electromagnetics, (Second Edition)

by David K. Cheng• Teaching Website: http://cms.szu.edu.cn/emc• Course Assessment:

Attendance 15%Homework (Projects, experiment) 15%Final Exam (Open-book Exam) 70%

Contents to be covered (Total 54 hours)

• Chapter 1 The Electromagnetic Model (2)• Chapter 2 Vector Analysis (6)• Chapter 3 Static Electric Fields (6)• Chapter 4 Solution of Electrostatic Problems (6)• Chapter 5 (*) Steady Electric Currents (2)• Chapter 6 Static Magnetic Fields (6)• Chapter 7 Time-Varying Fields and Maxwell’s Equations (6)• Chapter 8 Plane Electromagnetic Waves (6)• Chapter 9 Theory and Applications of Transmission Lines (4)• Chapter 10 (*) Waveguides and Cavity Resonators(4)• Chapter 11 Antennas and Radiating Systems(6)

Chapter 1 The Electromagnetic Model

1.1 The Electromagnetic Spectrum

1.1 The Electromagnetic Spectrum

1.2 Applications of Electromagnetics (EM)

1.2 Applications of Electromagnetics (EM)

1.2 Applications of Electromagnetics (EM)

1.2 Applications of Electromagnetics (EM)

1.2 Applications of Electromagnetics (EM)

1.2 Applications of Electromagnetics (EM)

1.2 Applications of Electromagnetics (EM)

Examples•

Propagation effects cannot be neglected when the signal path is not much smaller than the wavelength (e.g. ~0.1 wavelength)High speed digital circuits

–

System Clock ~ 2GHz

•

Inside the circuit, velocity of electromagneticwave ~ 2x108

m/s

(c is the velocity in vacuum)

–

If signal frequency f = 1GHz, wavelength λ

= 2x108

/ 1x109 = 0.2m

Examples

• High frequency analog circuits– Frequency ~ 1GHz – 10GHz

• Bluetooth• WLAN

• Optical Communications

ExamplesRadiation becomes efficient when the

dimension of conductor larger than 0.1 wavelength

• Consumer electronics

• Electromagnetic interference and compatibility

Electromagnetic Compatibility, or EMC, is the ability of a device, equipment, or system to function satisfactorily in its electromagnetic environment without introducing intolerable electromagnetic disturbances to anything in that environment.

Examples

• Other applications– Linear motor

– Computer

Example: Application of linear motor (Maglev Train)

The Shanghai Transrapid Maglev Line: speed up to 430 km/hr.

Japanese Bullet Train

What are Fields?

• Gravitational Field

• Electric Field

• Magnetic Field

Chapter 2 Vector Analysis 2.1Introduction

2.2 Vector Addition and Subtraction 2.3 Products of Vectors

2.3 Vector Operations (cont.)

2.3 Products of Vectors

2.3 Products of Vectors (cont.)

2.3 Products of Vectors (cont.)

2.3 Products of Vectors (cont.)

2.4 Orthogonal Coordinate Systems

2.4 Orthogonal Coordinate Systems

2.4 Orthogonal Coordinate Systems

2.4 Orthogonal Coordinate Systems

2.4 Orthogonal Coordinate Systems

2.4 Orthogonal Coordinate Systems

2.4 Orthogonal Coordinate Systems

2.4 Orthogonal Coordinate Systems

2.5 Vector Differential Operators

2.5 Vector Differential Operators

2.5 Vector Differential Operators

2.5 Vector Differential Operators

2.5 Vector Differential Operators

2.5 Vector Differential Operators

2.5 Vector Differential Operators

2.5 Vector Differential Operators

2.5 Vector Differential Operators

2.5 Vector Differential Operators

2.5 Vector Differential Operators

2.6 Two Null Identities

2.6 Two Null Identities