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- 11-17-2009 06:06 PM #1
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Cylindrical Parabolic Dish ADVERTS 1
I was driving around the other day and I saw an unusual dish. I didn't have anything to take a picture with, so I tried drawing it with Windows Paint. I believe it is called a cylindrical parabolic dish. Does anyone know what these dishes are used for?
- 11-17-2009 06:06 PM # ADS
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- 11-17-2009 06:08 PM #2
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WiFi?
- 11-17-2009 06:14 PM #3
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Point to Point wireless broadband? There is wireless broadband in parts of KY.
http://www.myretrotv.com/affiliates.html
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- 11-17-2009 06:15 PM #4
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How big was it?.........Did it look like this one in the pic?
- 11-17-2009 06:26 PM #5
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It looked pretty much like the one in the picture. It was beside what looked like a 4 ft prime focus dish on top of a store, so I'd estimate about 3-4 ft wide, and about 1 ft tall. The only difference was that it looked to have some type of lnb rather than the curved antenna in your picture.How big was it?.........Did it look like this one in the pic?
- 11-17-2009 06:36 PM #6
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This dish is actually parabolic, and around 4' wide.
It's used for two-way satellite communications.
This one is on a current gas station, and was installed recently.
I believe the particular dish is made by Prodelin.
The round dish to the rear is an Andrew (Primestar-identical) commercial dish of about 1 meter (?)
- 11-17-2009 07:14 PM #7
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That's it. Almost identical. It's hard to think that the one dimensional parabola would receive enough signal for satellite communications though. Must be a pretty powerful satellite.
- 11-17-2009 07:25 PM #8
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Almost all of the gas stations on the Garden State Parkway in New Jersy have the two dishes. Similar to the picture that Anole posted. Iwish I knew what satellite the are pointing to. A lot of the Luk oil station have that type of dish here in NJ.
- 11-17-2009 08:57 PM #9
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That's a 2-way for CC processing services... at least that's what I thought they were for...
- 11-17-2009 09:06 PM #10
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optical illusion:
It really is curved top to bottom.
Think of a four foot dish, with a slice about a foot high taken out of the middle (top and bottom are gone).
The slight amount of curve is hard to see, but I assure you it is a slice of a parabola!
All the energy of the height of the dish is focused onto a feedhorn about four inches high.
Below is a picture of something similar (not the real deal) to show what I'm talking about.
Just don't have a good close up of the feed on the dish I posted above.
edit:
The four foot width, gathers lots of signal from the desired satellite, and suppresses signals from adjacent birds.
So, for all intents and purposes, it works as well in this application, as a big four foot round dish would.
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