DTG2A3 Teknik Saluran Transmisi

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Johan Jayadi
6 tahun lalu
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1 DTGA3 Teknik Sauran Transmisi. MAAMMAAM KONDS SAURAN TRANSMS

2 Where Are We?

3 ontent 1. Penahuuan. Sauran pa rugi rugi (ossess / owoss) 3. Sauran Tanpa cacat (Distortioness) 4. Sauran Merugi (ossy) 5. Sauransauran stimewa

4 Penahuuan

5 oss aam Sauran Transmisi onuctor oss n transmission ine, the resisce of the conuctors is never equa to zero (There are no perfect conuctivity) Whenever current fows through conuctors, some energy is issipate in the form of heat. onuctor osses increase with an increase in frequency because of skin effect Dieectric oss the portion of the energy of an aternating eectrica fie in a ieectric meium that is converte into heat. Raiation oss Raiation osses occur because some magnetic ines of force about a conuctor o not return to the conuctor when the cyce aternates. These ines of force are proecte into space as raiation, an this resuts in power osses eakage oss nuction osses occur when the eectromagnetic fie about a conuctor cuts through any nearby metaic obect an a current is inuce in that obect. As a resut, power is issipate in the obect an is ost. eakage oss present in transmission ine having ieectric with finite resistivity

6 Distorsi signa aam sauran transmisi Any signa that carries significant information must has some nonzero banwith. n other wors, the signa energy (as we as the information it carries) is sprea across many frequencies f the ifferent frequencies that comprise a signa trave at ifferent veocities, that signa wi arrive at the en of a transmission ine istorte. We ca this phenomenon signa ispersion. ispersion is the phenomenon in which the phase veocity of a wave epens on its frequency. or aternativey when the group veocity epens on the frequency

7 Sauran ossess an istortioness Transmission ine Sauran ossy tapi istortioness Transmission ine Sauran ossy an teristorsi Transmission ine

8 Sauran Tanpa Rugirugi (ossess/owoss)

9 9 Paa sauran ini tiak terai reaman aya atau reaman ampitua ( = ). Agar tercapai maka : R an G = (punya konuktor an ieektrik yang sempurna) Sauran ioperasikan paa frekuensi tinggi ( >>R an >>G Sehingga paa sauran ossess beraku : p 1 1 R ) )( ( ) )( ( f G R G R Sauran ossess ata : Paa sauran ossess, kecepa phasa tiak tergantung ari frequency (frequency inepenence), maka paa sauran ossess uga beraku istortioness. Paa konisi tertentu, yaitu ketika sauran transmisi sangat panang maka sauran ossess bisa bersifat teristorsi karena perbeaan keci kecepa phasa akan menimbukan eay yang besar ika sauran sangat panang

10 1 Paa sauran transmisi ossess beraku : Tegangan an Arus paa Sauran ossess () () z z z z z e e z e e z z z z z z e e e e (z) e e (z) Revisi!!!

11 Tegangan an Arus paa Sauran ossess Persamaan Tegangan Dan Arus Jika Parameter Sumber iketahui! g g s + + o + s = z s s s cosh γz cosh z cos z s s s sinh γz sinh z sin z z s s s cosh γz cosh z cos z s s sinh γz s sinh z sin z

12 Tegangan an Arus paa Sauran ossess Persamaan Tegangan Dan Arus Jika Parameter Beban iketahui! g g s + + o + s = cosh γ cosh cos sinh γ sinh sin cosh γ cosh cos sinh γ sinh sin

13 13 γ γ in in h h : maka, h h Paa sauran transmisi ossess beraku : cos cosh sin sinh h mpeansi nput Sauran ossess

14 Sauran ossess ontoh Kasus Suatu sauran sepanang 5 km menghubungkan sentra ke peanggan. Diasumsikan sauran bersifat ossess an mempunyai impeansi karakteristik = 5 ohm an konsta fasa = 5 ra/km. Tegangan yang ikirimkan oeh sentra (tegangan sumber) = 1 < vot. Dipeanggan terapat pesawat teepon yang mempunyai impeansi 5 ohm. ariah : mpeansi input i sisi sentra Tegangan an arus i pesawat teepon peanggan

15 Sauran Tanpa acat (Distortioness)

Sauran Tanpa acat (Distortioness) Dua enis istorsi paa sauran : Distorsi Reaman. Distorsi ini terai apabia niai reaman merupakan fungsi ari frekuensi Distorsi fasa/istorsi kecepa fasa.

16 Sauran Tanpa acat (Distortioness) Dua enis istorsi paa sauran : Distorsi Reaman. Distorsi ini terai apabia niai reaman merupakan fungsi ari frekuensi Distorsi fasa/istorsi kecepa fasa. Distorsi ini terai ika niai kecepa fasa bergantung paa niai frekuensi Supaya sauran terbebas ari istorsi maka : Konsta reaman bukan fungsi frekuensi Kecepa fasa bukan fungsi frekuensi Untuk memenuhi syarat istortioness : Oiver Heavisie ( ) menemukan sousinya paa aba 19! R G Why??? 16

17 Konsta konsta paa sauran istortioness : 1 an atau Maka : atau G R G R G R G R G R G R G R G R p Sauran Tanpa acat (Distortioness) Frequency nepenent

Sauran Tanpa acat (Distortioness) Daam kenyataannya sauran transmisi tiak aa yang iea memenuhi syarat istortioness ine, an kebanyakan konisi aaah : G R Bagaimana cara agar konisi istortioness

18 Sauran Tanpa acat (Distortioness) Daam kenyataannya sauran transmisi tiak aa yang iea memenuhi syarat istortioness ine, an kebanyakan konisi aaah : G R Bagaimana cara agar konisi istortioness ine/heavisie terpenuhi??? Mu meta submarine teegraph cabe construction. This was a type of cabe use for ong unersea teegraph cabes, invente by The Teegraph onstruction an Maintenance ompany t., onon, in 193. The copper conuctor was wrappe with fine wire mae of Mu meta, a high permeabiity nickeiron aoy. t ha been foun that the seawater surrouning orinary cabes istorte the signa carrie by them, resuting in very ow transmission rates. The Mu meta wrapping ae inucce to the cabe, correcting the istortion an enabing higher ata rates.

19 Sauran Merugi (ossy)

20 Sauran ossy???

21 atihan soa 1. Suatu sauran transmisi beroperasi paa frekuensi 15 Mhz memiiki impeansi karakteristik 4 Ω, konsta reaman, Np/m, an konsta phasa,75 ra/m. a. Apakah sauran iatas ossess? b. Apakah sauran iatas istortioness? c. Hitungah konsta primer sauran iatas!. A ossess ine has a characteristic resisce of 5 Ω. The ine ength is λ. The oa impeance is Ω. Fin the input impeance.

22 Sauransauran stimewa

23 3 Sauran stimewa, Suatu sauran transmisi ossess engan panang engan impeansi beban in () + () + in. 1 n in 4. 1 n in 4 4

24 Sauran stimewa, Suatu sauran transmisi ossess engan panang engan impeansi beban in () + () + in 3. in arusnya: an tegangan Niai ) ( ) ( sin cos sin cos sehingga ) ( ) ( sin cos sin cos sehingga sin cos cos sin

25 Sauran stimewa Suatu sauran transmisi ossess engan panang engan impeansi beban + + () () in () () in,, + + = = in in in ( oc) in( Sc)

26 Tugas Ω g g 3 1cos( 1 t 1) R 1,4 / Km,37henry / Km G,8microMhos / Km,835 mf / Km 8 + J4 Ω. g Fin! 1 Ω g 1ot, γ, p, λ,α, β 5 43,7 J,8( perkm ) 3. 1 Ω g g 1ot 8 + J4 Ω = 1 Ω (ossess) = 1,5 λ (z) =.? + (z) =.? =,5 λ () =.? 15 Ω in =.? Г in =.? = 1Km SWR =.?

27 Questions???

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Teknik Transmisi Radio DTHF3 Teknik Transmisi aio By : Dwi Ani Nurmantris Yuyun Sitiohmah. MAAMMAAM KONDS SAUAN TANSMS Where Are We? ontent 1. Penahuuan. Sauran pa rugi rugi (ossess / owoss) 3. Sauran Tanpa cacat (Distortioness)