103技師 電磁學第四題 - 考試
By Jack
at 2017-10-11T16:33
at 2017-10-11T16:33
Table of Contents
以下題目:
https://i.imgur.com/AXJF7SM.jpg
我這邊題庫本解答,前兩行的列式如下:
+ -
V = V ....(1)
- +
E V V
--- — --- = ---
2Zo Zo Zo .......(2)
上兩式一直推不出來,還請各位幫幫忙~
以下自己重寫二式:
t<0時,負載ZL=Zo且達穩態
(1)
-
V -
負載處:---- =(ZL-Zo)/(ZL+Zo)= 0 ,V =0
+
V
(2)
入口處等效電路:
2Zo
┌─█┐
│ │
E ○ █ Zi(從輸入端看入之等效阻抗) = Zo
│ │
└──┘
+ -jβ(z-L) - jβ(z-L)
I(z)=I e + I e
z=0,入口處電流為:
+ jβL - -jβL + jβL - -jβL
I(z=0) = E*/3Zo = I e + I e = (V /Zo) e +(V /-Zo) e
哪裡觀念有誤?還請各位指點~謝謝!
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