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HW8 - 2 x 103 cos(g cos I9 E9(normalized sin 6 cos(kh cos 9...

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Unformatted text preview: 2 x 103 cos (g cos I9) . E9 (normalized) : sin 6 cos(kh cos 9) 005 (3 cos 9) . . _ Since —29-— has a null only toward 0 «1-; 0", the only way to place a. null toward sin 3 =_ 60° will be through cos(khc_os 9). icoswhcossnagafiw = |cos(khcos 9.,» = icosmcos'smn = o case—ha) ~ (fll-O _ =GOB;1(0) = 1%», In: 1,3,5»... . .f = 900 Mflz,Pmd = 1,000 watts a. Isotropic We 5 2:: r2 2 4:;2 = 4353) = % = 19558 ' b. A/4 monopole Dfimonopole) = 2(1.643) =‘3.286 Wad 5 Do Wm = 130:; r9 2 Do 45;; = 3.286 (£83) = 26.1492 1' 2 5.114 meters H I -fi=r .Ems = 90") = 02 - case - sin(khcosfl),02 = ”UTE”? EM = 90°”me = 02 .0059” - sin(o.707,\keosan) = o . oosfln=0=>Hn-=cos’1(0)=90° .. . . sin(0.7onkcos9,.) = sin(1.414&mos 9,.) = 0 => 1414me 9,. = sin-1(0)- 1.41411130an = sin-1(0) ; :l:mr,1ri = 0,1, 2,3, . .. L 1.414 On=ow'1(fl: ),n=0,1,2,3,.._. ...
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