Electromagnetics

Microwave Engineering CHO, Yong Heui

Microwave Engineering

EM Wave Lab 2

Introduction

David M. Pozar, “Microwave Engineering,” 2nd ed.,

John Wiley & Sons, 1997.

Robert E. Collin, “Foundations for Microwave

Engineering,” 2nd ed., IEEE Press, 2001.

0. Text

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EM Wave Lab 3

Who is he?

0. Spirit

Oliver Heaviside (1850~1925, England)

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EM Wave Lab 4

Who is she?

0. Spirit

Hedy Lamarr (1913~2000, Austria)

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EM Wave Lab 5

1. Maxwell’s equations

Basic equations (기본방정식)

: Gauss(가우스)’s law

: Faraday(패러데이)’s law

: Biot-Savart(비오-사바르)’s law

: Ampere(앙뻬르)’s law

D

0 B

Bt

E

Dt

JH

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EM Wave Lab 6

2. Explanations

Vector (벡터)

Vector: magnitude + direction

- Coordinate (좌표계):

-

Scalar: magnitude

- Real number (실수)

-

Temperature Velocity

E

),,( zyx

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EM Wave Lab 7

Electric field (전기장)

: electric field [V/m]

- Force:

: electric flux (전속) density [C/m2]

-

: electric potential [V]

- (static) , gradient (경사)

- Energy:

: permittivity (유전율) [F/m]

-

E

D

EqF

CVQED ,

r 0

EqVW

Electricity

2. Explanations

Microwave Engineering

EM Wave Lab 8

Magnetic field (자기장)

: magnetic field intensity [A/m]

: magnetic flux (자속) density [Wb/m2]

-

- Force:

: vector potential [Wb/m]

- , curl (회전)

- Energy

: permeability (투자율) [H/m]

-

H

B

A

BvqF LIHB ,

r 0

AB

Magnet

2. Explanations

Microwave Engineering

EM Wave Lab 9

Product (곱)

Dot product, inner product

-

Cross product, outer product

-

zzyyxx BABABABA

zBABABA xyyxˆ)(

Right screw Projection

2. Explanations

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EM Wave Lab 10

Gradient (경사, 구배)

Nabla (del),

-

(static field)

Peak detector

zz

yy

xx

ˆˆˆ

Map

xx

xExˆˆ

E

2. Explanations

Microwave Engineering

EM Wave Lab 11

Divergence (발산)

Source detector, hole detector

D

0 B

zyx D

zD

yD

x

2. Explanations

Tap

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EM Wave Lab 12

Divergence (발산)

Electric field Magnetic field

2. Explanations

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EM Wave Lab 13

Principle of divergence

2. Explanations

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EM Wave Lab 14

Curl (회전)

Rotation detector

,Bt

E

D

tJH

zBt

zEy

Ex

z

xy

ˆ

ˆ

2. Explanations

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EM Wave Lab 15

Principle of curl

2. Explanations

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EM Wave Lab 16

Maxwell’s equations

2. Explanations

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EM Wave Lab 17

Boundary conditions (경계조건)

: continuity of normal D

: continuity of tangential E

: continuity of normal B

: continuity of tangential H

21ˆˆ DnDn

21ˆˆ BnBn

21ˆˆ EnEn

21ˆˆ HnHn

Sourceless system

2. Explanations

Microwave Engineering

EM Wave Lab 18

Continuity of fields

: continuity of normal D

: continuity of tangential E

21ˆˆ HnHn

0C LdE

QSdDS

Gauss’ divergence theorem

D

Bt

E

Stokes’ theorem

2. Explanations

Microwave Engineering

EM Wave Lab 19

RF 부품 산업

3. Industries

RF components for CDMA

출처: 이경남, RF부품 수요 및 산업의 변화, 정보통신정책, 2004

Microwave Engineering

EM Wave Lab 20

Mobile RF 중장기 부품 수요

3. Industries

출처: 이경남, RF부품 수요 및 산업의 변화, 정보통신정책, 2004

Microwave Engineering

EM Wave Lab 21

RF 세부부품별 개발동향과 주요업체(1)

3. Industries

출처: 이경남, RF부품 수요 및 산업의 변화, 정보통신정책, 2004

Microwave Engineering

EM Wave Lab 22

RF 세부부품별 개발동향과 주요업체(2)

3. Industries

출처: 이경남, RF부품 수요 및 산업의 변화, 정보통신정책, 2004

Microwave Engineering

EM Wave Lab 23

RF 부품 산업의 변화 요인

3. Industries

출처: 이경남, RF부품 수요 및 산업의 변화, 정보통신정책, 2004

Microwave Engineering

EM Wave Lab 24

국내 RF 부품업체의 SWOT 분석

3. Industries

출처: 이경남, RF부품 수요 및 산업의 변화, 정보통신정책, 2004