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諧振電路

资料介绍
諧振電路q

Microwave & Communication Lab.

1

¤j

(Series Resonance) (Parallel Resonance)



Microwave & Communication Lab.

2

q§Pwq
(Bandwidth)wq°±a (Passband) -° 3dBWvdòC Q-wq°
¤ Wv Q= 3dBWe q§xs¤ à =ω× q¤§\v

Microwave & Communication Lab.

3

q§Pwq
ZS=RS+jXSA-Y°qP êpAh
1 2 I ωL S ωLS X S 2 QS = = = 1 2 RS RS I RS 2

LS q

RS

RS

XS

YP=GP+jBPA-Y°qe RP¨pAh
1 2 V ωC P ωC P B P R P 2 QP = = = = 1 2 GP GP X P V GP 2

C P P q
RP XP

Microwave & Communication Lab.

4

q§Pwq

RP
RS XS

XP
Q-¤A§Y

Microwave & Communication Lab.

RP Q = QS = Q P = R 1 S XS QS = =p ê § ¨¤ RS RP QP = = XP

1

2

Q- Q
5

q§Pwq

i Yz-W¤ o ±D¨H p ê P p ¨ ¤à§
RP = (Q + 1) RS ,
2 S

)

RP XP = QP
XP ≈ XS

-Y QS>>1h A
2 RP ≈ QP RS ,

P Az Y-

QP>>1h A
XS ≈ XP
6

RP RS ≈ 2 , QP

Microwave……
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