Download - 第 5 章 动态电磁场与电磁波
Transcript
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5
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5-1 1.1) Hh0
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Eh0
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BDBD 2)11=022=2J2J=EE2=0B2H2B2=0H2=0
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z=0z=d E0HJs
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z=0n0=az z=dn0=-az
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2.
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j j
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J3.
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10-3
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5-2
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S V VVV
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5-3 A
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maxwell
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() / (rad/m). m/s
- dq = dV(r,t)= (r,t)r (0 < r
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dq dqrR =|r - r| V (r,t)r
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V J(r,t)r J
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5-4 1. l , ,
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2.
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1() 290Sav ( )
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3. f( ,)
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Rr P Rr GSMf=900 MHz0.12 Wf =1.8 GHz0.11 W3 cm [] 90 f900 MHzSavmax265.2 W/m2 26.52 mW/cm2 f1.8 GHzSavmax132.6 W/m2 13.26 mW/cm2 IEEE/ANSI1 mW/cm2
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4.