Difference between revisions of "Antenna Double Bazooka"

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[[Image:Orari.jpg|right|100px|thumb|[[Organisasi Amatir Radio Indonesia]]]]
 
[[Image:Doublbaz.gif|center|300px|thumb]]
 
[[Image:Doublbaz.gif|center|300px|thumb]]
  
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Rumus dalam Meter
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Rumus Antenna dalam Meter
  
 
  Panjang Total Antenna (m)  = 140.21 / frekuensi (MHz)
 
  Panjang Total Antenna (m)  = 140.21 / frekuensi (MHz)
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! Panjang Coax (meter)
 
! Panjang Coax (meter)
 
! Twinlead / sayap (meter)
 
! Twinlead / sayap (meter)
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! Min. Tinggi dr tanah (meter)
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! Min. Tinggi ujung dr tanah (meter)
 
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|-
 
| 1.618
 
| 1.618
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| 61.22
 
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| 3.550
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| 3.8
 
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| 7.025
 
| 7.025
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| 7.070
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| 10.147
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| 13.82
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| 14.070
 
| 14.070
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| 7.04
 
| 7.04
 
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| 9.91
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| 7.00
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| 1.45
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| 8
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| 2
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| 18.105
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| 7.74
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| 1.14
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| 8
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| 2
 
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| 21.070
 
| 21.070
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| 4.7
 
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| 0.98
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| 2
 
|}
 
|}
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Bagi yang kesulitan mencari kabel 300 ohm, dapat membuat sendiri Ladder Line 300 ohm melalui rumus
 +
 +
Z = 276 log ( 2S/d )
 +
S = (d/2) 10 * exp(Z/276)
 +
 +
S = Spasi antar kabel
 +
d = diameter kabel
 +
 +
 +
Contoh untuk Z = 300 ohm
 +
 +
d = 1.5 mm
 +
S = 22.2 mm
 +
 +
d = 2.5 mm
 +
S = 37.07 mm
 +
  
 
==Referensi==
 
==Referensi==
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* [[Antenna Amatir Radio]]
 
* [[Antenna Amatir Radio]]
 +
 +
[[Category: ORARI]]

Latest revision as of 09:43, 11 May 2010

Organisasi Amatir Radio Indonesia
Doublbaz.gif

Rumus Antenna dalam Meter 

Panjang Total Antenna (m)  = 140.21 / frekuensi (MHz)
Panjang Total coax (m)     =  99.06 / frekuensi (MHz)
Panjang Twinlead satu sisi = (Total Antenna - Coax) / 2

Beberapa Hasil Perhitungan

Frekuensi (Mhz) Total Antenna (meter) Panjang Coax (meter) Twinlead / sayap (meter) Min. Tinggi dr tanah (meter) Min. Tinggi ujung dr tanah (meter)
1.618 86.66 61.22 12.72 18 5
3.550 39.5 27.9 5.8 12 5
3.8 36.9 26.07 5.41 12 5
7.025 19.96 14.1 2.93 8 3
7.070 19.83 14.01 2.91 8 3
7.110 19.72 13.93 2.89 8 3
10.147 13.82 9.76 2.03 8 2
14.070 9.97 7.04 1.46 8 2
14.150 9.91 7.00 1.45 8 2
18.105 7.74 5.47 1.14 8 2
21.070 6.65 4.7 0.98 8 2


Bagi yang kesulitan mencari kabel 300 ohm, dapat membuat sendiri Ladder Line 300 ohm melalui rumus 

Z = 276 log ( 2S/d )
S = (d/2) 10 * exp(Z/276)

S = Spasi antar kabel
d = diameter kabel


Contoh untuk Z = 300 ohm 

d = 1.5 mm
S = 22.2 mm

d = 2.5 mm
S = 37.07 mm


Referensi

Pranala Menarik

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