Exclusive: Offset Dish and Focus Dish Focal Point
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21-05-2014, 01:00 PM
Post: #1
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Offset Dish and Focus Dish Focal Point
*Axial or front feed This is the most common type, with the feed antenna suspended in front of the dish on the beam axis, at the focal point, pointed back toward the dish. One drawback of this type is that the feed and its supports partially block the beam.
*Off-axis feed or offset-feed The primary reflector is asymmetric, with the focus, and the feed, located to one side, outside the beam area. This avoids the problem of the feed obstructing the beam. It is used in home satellite dishes. *Cassegrain In this design, the feed is located on or behind the dish, and its beam illuminates a small hyperboloidal secondary reflector at the focus of the dish, which reflects the beam back to the parabolic dish. It is used in antennas with bulky or complicated feeds, such as satellite ground antennas and radio telescopes. * Gregorian This is similar to the Cassegrain, except the secondary reflector has a concave ellipsoidal shape. Image- [IMG]Guests cannot see images and links in the messages. Please register to forum by clicking Register Here to see images.[/IMG] OR Login to view. Please Upload Screenshots Here : http://www.sathunters.in I Do Not Answer Questions In PM! For All Questions There Is a Forum Where, To The Extent Possible, I Will Answer. |
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The following 5 users Like SHFARUN's post: Babu, pala, Rammoon, Rammoon, rpd |
21-05-2014, 01:20 PM
Post: #2
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RE: Offset Dish and Focus Dish Focal Point
Good Update bro...
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22-05-2014, 09:10 PM
Post: #3
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RE: Offset Dish and Focus Dish Focal Point
Nice information.brother
HARD WORK NEVER FAIL |
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22-05-2014, 09:20 PM
Post: #4
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RE: Offset Dish and Focus Dish Focal Point
Good informative post Bro
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