Percobaan 8

LAPORAN PRAKTIK  TEKNIK FREKUENSI TINGGI DAN GELOMBANG MIKRO

PERCOBAAN VIII

REDAMAN PADA PADA WAVEGUIDE   DENGAN BAHAN DIELEKTRIKUM  WAVEGUIDE  DENGAN

Disusun oleh Rahmalina Andriastti TK!"A ! "#""#$"#%#$& ' $(

PROGRAM STUDI D" TEKNIK TELEKOMUNIKASI )URUSAN TEKNIK ELEKTRO POLITEKNIK NEGERI SEMARANG TAHUN *%$(

PERCOBAAN VIII

REDAMAN PADA WAVEGUIDE  DENGAN BAHAN DIELEKTRIKUM

I.

ALAT YANG DIGUNAKAN 1. Gunn Osilator 9V DC 9 GHz 2. IN!"io"e #o"ulator  $. Generator 1 KHz "i atur 2 V%!% &. Cr'stal Dete(tor  ). Os*ilos*o%e +. #ulti,eter  -. ahan Diele(tri(u, 8. Waveguide

II.

T/O0I INGKAT Dala, seuah siste, (o,uni(asi ra"io a"a an'a( hal 'an3 ,e,un3(in(an ter4a"in'a re"a,an %a"a (e(uatan sin'al. eera%a "iantaran'a a"alah (ael saluran (ael5 (one(tor5 anti!%etir5 u"ara 6 free space75 ,au%un era3ai halan3an lain se%erti 3e"un35 %ohon5 u(it. e,ua ini a(an ,en'ea(an turunn'a (e,a,%uan 4i(a  %e,asan3an ti"a( "en3an ai(. A"a ti3a ti%e %era,atan 'an3 "i(enal %a"a saluran trans,isi ,au%un u,uun3 3elo,an35 'aitu ti%e T/# 6Tranverse Electric Magnetic75 T/ 6Tranverse Electric75 "an T# 6Transverse Magnetic75 iasan'a ti%e T/# 'an3 ter4a"i %a"a saluran trans,isi5 se"an3(an ti%e T/ "an T# u,u,n'a ter4a"i %a"a u,un3 3elo,an3 6waveguide7. 0u3i!ru3i in"u(si atau ra"iasi ini ter4a"i a(iat a"an 'a ,e"an!,e"an ele(tro,a3neti(  'an3 a"a "i se(itar (a8at %en3hantar. 0u3i!ru3i in"u(si ter4a"i (eti(a ,e"an ele(tro,a3neti( "ise(elilin3 %en3hantar ter(ena lan3sun3 "en3an suatu %en3hantar  terseut5 a(iatn'a "a'a hilan3 %a"a %en3hantar terseut. 0u3i!ru3i ra"iasi ,eru%a(an ru3i!ru3i 'an3 "isea(an hilan3n'a sea3ian 3aris!3aris 3a'a ,a3net (arena ,e,an*ar (eluar "ari saluran trans,isi. 0e"a,an ,un*ul a(iat a"an'a ru3i! ru3i %a"a saluran trans,isi 'an3 "in'ata(an "ala, satuan "e*iel %er satuan atau%un ne%er %er satuan %an4an3.

Ga,ar .1. Ga,ar 0an3(aian er*oaan erta,a

Ga,ar .2. Ga,ar 0an3(aian er*oaan Ke"ua III.  No .

1.

2.

HAIL /0COAAN

ahan Diele(tri(u,

Tan%a :a;e3ui"e 6en3u(uran Lan3sun37

Tan%a ahan Diele(tri(u,

Te3an3an 6V7

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Ga,ar in'al

$.

Diele(tri(u, enin3

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Diele(tri(u, utih

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Diele(tri(u, ura,

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IV.

ANALIA DATA Dari hasil %er*oaan 'an3 telah "ilau(an "a%at "ianalisa ah8a "ala, (o,uni(asi ra"io "i,un3(in(an a"an'a re"a,an %a"a (e(uatan sin'al "iantaran'a a"alah (ael saluran (ael5 (one(tor5 anti!%etir5 u"ara 6 free space75 ,au%un era3ai halan3an lain se%erti 3e"un35 %ohon5 u(it. e,ua ini a(an ,en'ea(an turunn'a (e,a,%uan  4i(a %e,asan3an ti"a( "en3an ai(. a"a %er*oaan ini "ila(u(an %eran"in3an (e(uatan 3elo,an3 ,i(ro 4i(a "ala, waveguide ter"a%at ahan "iele(tri(u,. Di3una(an "ua ,eto"e untu( ,e,u(ti(an a"an'a re"a,an "ari ahan "iele(tri(u, 'aitu "en3an %en3u(uran lan3sun3 "an ,en33una(an waveguide 'an3 "i"ala,n'a ter"a%at ahan "iele(tri(u,. ahan "iele(tri(u, 'an3 "i3una(an a"alah ahan se%erti (a*a 'an3 ,e,ili(i 8arna ee"a!e"a %a"a setia% %er,u(aann'a se%erti  enin35 ura, "an er8arna %utih.

Ga,ar ran3(aian %erta,a 'aitu %en3u(uran lan3sun3 tan%a waveguide =

Ga,ar ran3(aian (e"ua 'aitu %en3u(uran ,en33una(an waveguide 'an3 "i"ala,n'a ter"a%at ahan "iele(tri(u,=

Gun Osilator >re(uensin'a "iatur seesar 9 GHz5 untu( ,e,an3(it(an 3elo,an3 ,i(ro (e,u"ian 3un osilator "ihuun3(an %a"a su,er te3an3an !1re(uensi 3enerator "iatur 1 KHz "en3an te3an3an 2 V%!%. a"a %en3u(uran lan3sun35 %in "io"e ,o"ulator lan3sun3 "ihuun3(an "en3an *r'stal "ete*tor 'an3 "ihuun3(an "en3an osilos(o% untu(  ,en3etahui entu( sin'al 'an3 "ihasil(an. e"an3(an saat %en3u(uran ,en33una(an waveguide5 %in "io"e ,o"ulator "an *r'stal "ete(tor "i%isah(an oleh waveguide 'an3 "i"ala,n'a ter"a%at ahan "iele(tri(u, untu( ,en3etahui res%on 3elo,an3 ,i(ro "en3an a"an'a ahan "iele(tri(u,. ahan "iele(tri(u, 'an3 "i3una(an a"alah ahan se%erti (a*a 'an3 ,e,ili(i 8arna ee"a!e"a %a"a setia% %er,u(aann'a se%erti  enin35 ura, "an er8arna %utih. A(an terlihat %ere"aan hasil "ari setia% ahan "iele(tri(u, 'an3 "i3una(an. a"a %er*oaan %erta,a 'aitu %en3u(uran 3elo,an3 ,i(ro ,en33una(an ran3(aian  %er*oaan tan%a waveguide5

hasil 'an3 "ita,%il(an %a"a os*illos*o%e a"alah

3elo,an3 (ota( 'an3 ,e,ili(i >re(uensi 1 (Hz "en3an te3an3an ou%ut seesar 112 ,V.

a"a %er*oaan (e"ua 'aitu ran3(aian %en3u(uran 3elo,an3 ,i(ro "en3an waveguide tan%a ahan "iele(tri(u,. Hasil 'an3 "ita,%il(an %a"a os*illos*o%e a"alah 3elo,an3 (ota( 'an3 ,e,ili(i >re(uensi 1 (Hz "en3an te3an3an out%ut seesar 9< ,V. Ke,u"ian "i "ala, waveguide ter"a%at ahan "iele(tri(u, eru%a (a*a enin3 "an hasil 'an3 "ita,%il(an %a"a os*illos*o%e a"alah 3elo,an3 (ota( "en3an te3an3an &+ ,V. elan4utn'a ahan "iele(tri(u, "en3an ahan (a*a er8arna ura, "an ,en3hasil(an te3an3an seesar + ,V %a"a osilos(o% "an 'an3 tera(hir ahan "iele(tri(u, "i3anti ,en4a"i (a*a er8arna %utih 'an3 (e,u"ian ,en3hasil(an te3an3an seesar -< ,V %a"a osilos(o%. ehin33a "ari %er*oaan 'an3 telah "ila(u(an "a%at "i(etahui ah8a waveguide ,e,%en3aruhi (e(uatan 3elo,an3 ,i(ro. elain itu5 ahan "iele(tri(u, 'an3 ter"a%at "ala, waveguide 4u3a er%en3aruh %a"a (e(uatan sin'al i>at "iele(tri(  ,un*ul %a"a isolator listri( 'an3 ti"a( "a%at ,en3hantar(an ,uatan listri(5 a(an teta%i ia %e(a terha"a% suatu ,e"an listri(. 0e"a,an 'an3 "ihasil(an oleh ahan "iele(tri(u, ter3antun3 %a"a 4enis ahan "an 8arna ahan. e%erti hasil %er*oaan "iatas 'an3 ,en33una(an ahan "iele(tri(u, "en3an ahan "asar sa,a 'aitu (a*a a(an teta%i 8arna "ari (a*a terseut ere"a sehin33a re"a,an 'an3 "ihasil(an 4u3a  ere"a. a"a ahan "iele(tri(u, "en3an 8arna enin3 atau 4ernih te3an3an 'an3 "ihasil(an seesar &+ ,V5 %a"a ahan er8arna ura, ,en3hasil(an te3an3an seerar + ,V5 "an %a"a ahan er8arna %uttin3 ,en3hasil(an te3an3an seesar -< ,V. ?i(a "ilihat "ari te3an3an 'an3 "ihasil(an5 re"a,an %alin3 esar "ihasil(an oleh  ahan "iele(tri(u, "en3an 8arna enin3 "an %alin3 (e*il 'aitu ahan er8arna  %utih. V.

K/I#ULAN

1. Dala, (o,uni(asi ra"io "i,un3(in(an a"an'a re"a,an %a"a (e(uatan sin'al "iantaran'a a"alah (ael saluran (ael5 (one(tor5 anti!%etir5 u"ara 6 free space75 ,au%un era3ai halan3an lain se%erti 3e"un35 %ohon5 u(it.

2.   Waveguide ,e,%en3aruhi (e(uatan 3elo,an3 ,i(ro. elain itu5 ahan "iele(tri(u, 'an3 ter"a%at "ala, waveguide  4u3a er%en3aruh %a"a (e(uatan sin'al. $. ahan "iele(tru, 'an3 ,en3hasil(an re"a,an %alin3 esar 'aitu (a*a enin3 "an %alin3 (e*il 'aitu (a*a %utih..