作者plumeshouse (羽居)
看板Grad-ProbAsk
标题[理工] [电磁]平面波
时间Sun Nov 15 18:52:41 2009
An infinite time-harmonic surface current sheet with surface current density
-> ->
Js = ax Js e^(jwt) (A/m)
located on the z=0 plane. Find the electromagnetic wave it produces everywhere
in space.
(92交大电信)
ANS:
$=本质阻抗
z>0
-> ->
E = -ax $ (Js/2) e^(-jkz)
-> ->
H = -ay $ (Js/2) e^(-jkz)
z<0
-> ->
E = -ax $ (Js/2) e^(jkz)
-> ->
H = ay $ (Js/2) e^(jkz)
-----------------------------------------------
我想问说为什麽不可以用
-> ->
J=(sigma) * E
来决定E方向
也久是说E是+ax方向??
可以帮我解答一下吗
头脑转不过来了
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1F：→ iyenn:时变源,顺序 求A->H->E 11/15 19:48
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