Satellite dish antenna Prime-focus technical basics like f/D ratio
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02-25-2013, 11:32 AM
Post: #1
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Satellite dish antenna Prime-focus technical basics like f/D ratio
Here is a small introduction to the technical specifications that one may come across while building a parabolic satellite dish antenna.
The first thing that is common is f/D ratio which is the focal length f of the dish reflector divided by the diameter D of the dish. Commercially available dish antennas have a f/D ratio of between 0.36 to 0.40 although 0.5 is also seen in imported antennas. I prefer 0.38 for optimum signal reception. Image 1 - The parameters of the satellite dish antenna indicated: [img][/img] Guests cannot see Images in the messages. Please register to forum by clicking here to see links. Image 2 - The dish antenna focussed properly with correct f/D ratio: [img][/img] Guests cannot see Images in the messages. Please register to forum by clicking here to see links. Image 3 - f/D ratio is high leading to bad reception: [img][/img] Guests cannot see Images in the messages. Please register to forum by clicking here to see links. Image 4 - f/D ratio is low leading to bad reception: [img][/img] Guests cannot see Images in the messages. Please register to forum by clicking here to see links. |
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02-25-2013, 05:45 PM
Post: #2
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RE: Satellite dish antenna Prime-focus technical basics like f/D ratio
Great work Vinay..
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02-25-2013, 05:53 PM
Post: #3
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RE: Satellite dish antenna Prime-focus technical basics like f/D ratio
gud work dear vinay..
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