资料介绍
阻抗匹配1§¤°t]×^
Microwave & Communication Lab.
1
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L§¤°t Q-eW±a§¤°t
(Smith Chart)§¤°t
Microwave & Communication Lab.
2
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VS¤°
RS RL
RSP-tü
IL
RLêp
VS
é¨ì-tü¤W\v°
2 V 2 PL = I L RL = L RL 2 V 2 S RL PL = I L RL = ( RS + R L ) 2
VS IL = RS + R L
3
Microwave & Communication Lab.
°ò§
°¨-tü RLàò±o¤j\v
dPL = 0 B dRL d 2 PL <0 2 d RL
2 + 2 R L ( RS + R L ) R R 2 ( ) dPL 2 S L = VS =0 4 dRL ( RS + R L )
( RS + RL ) 4 ≠ 0 2( RS + R L ) 2 2 RL ( RS + RL ) = 0 ( RS + RL )( RS RL ) = 0 ∴ RS = R L
Microwave & Communication Lab.
4
°ò§
Remark:
RL=RS C ZS=RS+jXSA t - °§ü * ZL=RL+jXLAí RS=RL B jXS= - jXLA§Y A -t L = Z S Z üà°÷ò±o¤j\véC
* ZS = ZL
ZL jXL RL
RS VS
jXS
Microwave & Communication Lab.
5
°ò§
Remark(ò ):
:
* Z in * Zin Z out
Zout Mo
Z1*
M1
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