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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
Microwave Engineering
EM Wave Lab 3
Who is he?
0. Spirit
Oliver Heaviside (1850~1925, England)
Microwave Engineering
EM Wave Lab 4
Who is she?
0. Spirit
Hedy Lamarr (1913~2000, Austria)
Microwave Engineering
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
Microwave Engineering
EM Wave Lab 6
2. Explanations
Vector (벡터)
Vector: magnitude + direction
- Coordinate (좌표계):
-
Scalar: magnitude
- Real number (실수)
-
Temperature Velocity
E
),,( zyx
Microwave Engineering
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
Microwave Engineering
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
Microwave Engineering
EM Wave Lab 12
Divergence (발산)
Electric field Magnetic field
2. Explanations
Microwave Engineering
EM Wave Lab 13
Principle of divergence
2. Explanations
Microwave Engineering
EM Wave Lab 14
Curl (회전)
Rotation detector
,Bt
E
D
tJH
zBt
zEy
Ex
z
xy
ˆ
ˆ
2. Explanations
Microwave Engineering
EM Wave Lab 15
Principle of curl
2. Explanations
Microwave Engineering
EM Wave Lab 16
Maxwell’s equations
2. Explanations
Microwave Engineering
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