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Microwave Engineering CHO, Yong Heui Resonator

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(1)

Microwave Engineering

CHO, Yong Heui

(2)

EM Wave Lab

2

 Filter

 Oscillator

 Frequency meter

 Tuned amplifier

(3)

 Input impedance

 Input power

 Resonant frequency: Wm = We

C L j

j

Z

in

   

 

 

 

C

L j j

I I

Z VI

P

in * in 2 2

 

2 1 2

1 2

1

LC

 1

(4)

EM Wave Lab

4

 R, L, C

 Input impedance

 Input power

 Resonant frequency

C L j

j R

Z

in

    

 

 

  

C

L j j

R I

I Z

VI

P

in * in 2 2

 

2 1 2

1 2

1

LC

 1

(5)

 Definition

 3 dB bandwidth

 Q in terms of R, L, C

d loss/secon Energy

stored energe

Average

Q

BW f

0

Q

RC R

L P

Q W

l m

0 0

0

2 1

   

(6)

EM Wave Lab

6

 Input impedance

 

     

 

 

R j L R j L

Z

2

2

2 0 2

in

(7)

 R, L, C

 Input admittance

 Input power

 Resonant frequency

C L j

j

Y R

 1

in

 

 

  

j C

L j V R

V Y

VI

P

 1

2 1 2

1 2

1

* 2 2

in

* in

LC

 1

(8)

EM Wave Lab

8

 Q in terms of R, L, C

L RC R

P Q W

l m

0 0

0

2 

   

(9)

 Input admittance

 

     

 

 

j C

C R R j

Y 1 1 2

2 2 0 2

in

(10)

EM Wave Lab

10

 Unloaded Q: resonant circuit itself

 Loaded Q: External load resistor

Q Q

Q

L e

1 1

1  

(11)

 Transmission line

 Input impedance: lossy medium

 

) tanh(

) tan(

1

) tan(

) tanh(

tanh

0

0 in

l l

j

l j

Z l

l j

Z Z

 

(12)

EM Wave Lab

12

 Low-loss transmission line

 Phase:

l l

 )  tanh(

2 /

0

 , 

    l

0 0

) tan(

)

tan( 



 

l    

(13)

 Input impedance

 Quality factor

 





 

 

 

 

 

jL R

j l

l Z j

j Z l

Z

2

) /

( 1

) /

(

0 0

0 0 0

in

2 2

0

 

R l

Q L

(14)

EM Wave Lab

14

 Transmission line

 Input impedance: lossy medium

 

) tan(

) tanh(

) tanh(

) tan(

1

coth

0

0 in

l j

l

l l

Z j

l j

Z Z

 

(15)

 Low-loss transmission line

 Phase:

l l

 )  tanh(

2 /

0

 , 

    l

0 0

) tan(

)

tan( 



 

l    

(16)

EM Wave Lab

16

 Input impedance

 Quality factor







 

 

 

jC R

j l

Z j

l

l Z j

Z

2 /

1

1

) /

( )

/ (

) /

( 1

0 0

0 0 0

in

 

2

0

 2 

RC l

Q

(17)

 Metallic wall

 Propagation constant

 Resonant condition

2 2

2

 

 

 

 

 

b

n a

k m

mn

 

mn

dl

(18)

EM Wave Lab

18

 Resonant wavenumber

 TE101 mode and TM110 mode

 Q of cavity

2 2 2

 

 

 

 

 

 

 

 

 

d l b

n a

k

mnl

m   

l e

P Q 2 W

0

(19)

 Metallic wall

 Propagation constant

 Resonant condition

 TE111 mode and TM110 mode

mn

dl

(20)

EM Wave Lab

20

 High Q

 Fringing field

 High permittivity: magnetic wall

 Mechanical tuning

 TE01d mode

 Notation

1 /

2 

L

g

d

(21)

 Two mirrors

 High Q

 Laser

 Millimeter and optical applications

참조

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관련 문서

2011 Korean Government Scholarship Program for International Students for an Undergraduate Course

Energy Resources Engineering Architectural Engineering Environmental Engineering Mechanical Engineering Vehicle Engineering Mechatronics Engineering Electrical

Kangwon National University

Instrumentation Engineering, Chemical Engineering, Advanced Materials Engineering, Electronic Engineering, Information Communication Engineering, Computer

Ⅰ. Application Timeline

Division of Architectural, Civil and Environmental Engineering - Department of.. Architectural Engineering - Department of Civil Engineering -

Kangwon National University

Division of Electrical and Electronic Engineering (Electrical and Electronic Engineering, Electronics Engineering, Electronic and Communication Engineering),

Undergraduate Application Guidelines for International Students

Division of Architectural, Civil and Environmental Engineering - Department of.. Architectural Engineering - Department of Civil Engineering -

￭대한내과학회 추계학술대회 회의장￭

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Microwave Filter

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