20091104Lect29EE429_529

20091104Lect29EE429_529 - ECE 529 EMI IN MICROELECTRONICS...

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ECE 529 EMI IN MICROELECTRONICS University at Buffalo Dr. James J. Whalen L Z '1 2.·06b VI eJ· I No'Y ZOif( \,ife~ 3llk+ (a;7 L28 200t~ enOl) v 27Dch 2l.lOB Lecture 9 30Sep96
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5.2 THE HALF-WAVE DIPOLE AND QUARTER-WAVE MONOPOLE (a) f(z) -1- h I I Image --tf(~__ j_ Perleclly conducting ground plane 7~3 (b) FIGURE 5.3 Illustration of (a) the dipole antenna and (b) the monopole antenna . ..uo .... - I"'~ ~(a) (~rlM+
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~ _ {1m sin[fJo(tl - :)] 1(z) - ~. 1 t; sm[PoCII + :)J forO<z<tl for -il < z < 0 p II + ------------ y / / / / / / Ji x i(Z) z (a) (b) FIGURE ?~l( Computation of the radiated fields of the dipole antenna: position of the Hertzian dipole fields: (b) the far-field approximation. (5.13 ) (a) supei
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T- Lin,e It;;( .I(;!) "= k:~5/{)p() (i-2') ()~2~~ H 2 I.Cz?) := ~XSi(}po (i+z?) --4~2'tE 0
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fa) z cos II q- [.;/
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where the 8-variation term in this result is denoted by FUJ) = cos[/3o(tl) cas 8] - cos /3o(tl) sin 0 COS[(7rl/-\0) cas 0] - cos(nl/Ilo) - sin 0 /\ /"\ / HC¥ Ee 10 <t]~ = 3 77 J2 !--L'd I-~ ve D;pvle:.J ~ 1Iz cf ~Iz:: /lILj & f:: ± c O~ C Tf)/10) = Co 5 ( tC(z) z: 0 £. .Jl./){J= -1 ~(8) = cos ( 1 rr (050) SI f) e
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PCG» = cos(.Jf GOf,G) SIr] e 01 ct'X 1M vr1 4-+ G.:: q 0 e ( 6 roced s/).p ) FCcroO) :::: (()<;;(lfC 0 5Cfd) ~ (05C/~~_:J S J rt f o() f /1l?OV .2.- C ;;; vad-(, re ) (u-sCo/z ICO{'OO) '"'
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