20091123Lect37EE429-529

20091123Lect37EE429-529 - ECE 529 Introduction to EMC...

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Unformatted text preview: ECE 529 Introduction to EMC University at Buffalo Dr. James J. Whalen Lecture 22 13Nov96 ~J ~S~yO{; l t.t Nd\J07 ''2 Noy Oe La+ ss \AkJ Fo I' (Y )u i Co I) verStO() C O ()S rdef' T wcJ 'v/'fes .I e > "., Exctmpl e .Ie:: 37fiA J:CJN~.:: 7YJ1A- I.E e . max 1 = 1.257 X 10- 61 Ie ~ .!f (8.16) Surface 5 C ontour C- - I (a)--H inge (b) FIGURE 8.9 The current probe: (a) illustration of Ampere's law; (b) use of the probe to measure currents. X! .2 q ~z. ~ . If)--- T ('Q 115 +-(?('-] (f) p daY) cf.. I (\ 2 0 {091O 2,(-0..) rl) (1)V~A (.12) ~ 4CJ2) dBJL I--+ --+ ---H -J+ H I - ~ - - j- + - H 1 + f- - - - - 1 I- - /- a- 20 ~ 1+ N 0. 0 '-30 .lMHz IOMHz FREOUENCY IOOMHz lOOOMHz FIGURE 8.10 A typical measured current probe transfer impedance (courtesy of Fischer Custom Communications, Inc.) IMHz 12 dBIL ~ 412 ~I ._ I~rr.tll-l!,.::.ril.,:r", ,- I I-I i (r.,IL L II,.;;,\! .... ::T/!;::'\., .... .I.i ,lJV(IL,lljj;i :_LL!li! 'I . + -b !:-:.L .....-., I I 1 lt ~ 'l ! : ; . . : i V , ~ : ! : "- : "f' . , ; ; ! ! . i_ I.t . il"l!'lj'! :.;, .'! 'i~'V' :U f ~~, tl'.Ii t l ll;:: ::;. :'N. ::,1/ : i : .. ':-:V'~ :;'.1:.,':,' ' ' ' i : ' i I 2 y! , ! I I:' I . . . !'. : I . !!.. .. I I . i ! : J l 11I ::!, .. ;: 1: I . ! ,v.j;' 1 I I !'! i'x~~ I ' i . . r i 1 ;. . l i ; I _~~-'=Iil ii, ,'Vi;'::'-I ii!:; iiii i::.: i'jl?f:!::: l-Ij-i:-I-lji i~;,:j':::i ''::'1 ' i !IT o . I.5S ---I II 's p 1:.iff1 ...t<!-- i'-I--!-.... LI ~ J j.L ~ i.i. '.LU tj!4 U Xi -. i "i' t . " ',' .. "',1: :",;,;;':[::".'1 ; U j ,,-R .'--.'-~ . 1,-: f~:" ( \ I ~- : : : l!~1 'iil;iJ '!Illi!:!:i: Jiil 11 '~ III"I"I'~ 'I,ii 1-1-11:1!lilll'l!j~; 1JL!-li:j" i i -!~:jti'++ii- .- - J I I.. I' ,j-. L I III' ,,,. I-1.-. I-~I - - II- 'I. I-t-d I-I- L-, : ii' II Ii]' Ii I . .! j .. /- - . . I- I.l) ~ (~-- I I 1 iJ~ 1/:; l i ! . ! , ! P ' 1-!' -.. - uu iii I . I \I ! I!-I ~l ! - i t : " I' ,: I" "'1 'I 1"1 I, 'I' ! I j I I I I'i-, i IJ )~ 01 '.:"""!+ 'III,,'1 _ _ III I I I 111!lI' I III ,II"" II III 'i (r)::~ :1 9 - II Jlj/~IVJ" I ~+-.ut!.,:, i ;'1' 111 ~!I(i 1 '\ :1Ir'1!i ! j j' ;j "lli ; !r-j; o:'; B ii, rf i i i; 1,! I i i ! ! 1 I t W . - ill I i II I i I ; Ii I ; I I : 111 i j i 1 I k7_ . I L11 I I ~+! !; j i j H . '~ : ~ ij 7 _-n 111I iil lfTi [illllll: 1-II i I I fGrl111 ill l Illlil' ii', II il~i Iii Ii-!' 1l1,!Hil Illi if;I-'II il~i Iii Ii-!...
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20091123Lect37EE429-529 - ECE 529 Introduction to EMC...

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