Prime Focus satellite Dishes
Look in the SatLex gallery for more pictures of Prime Focus dishes!
Advantages:
- Because of its relatively large surface, the prime focus antenna is less sensitive to small directional deviations and there is a better chance of receiving signals outside the normal footprint. But on the other hand, because of the small beamwitdh (3dB) angle, the antenna has to be setup more accurate than a normal offset one.
- Rain and snow can easily collect in the dish and could interfere with the signal.
- Because of the LNB is mounted centrally, a lot of the incoming signals are blocked by the LNB on the way to the antenna surface. But if using only a Ku band feed, the shadow won't be that big as when using a C band feed.
The Mesh dish is a special form of the Prime Focus Antenna. A Mesh dish is made up of some kind of reticule. Just like the normal PFA, a Mesh dish is being used for C band reception using an Egis rotor.
Look in the SatLex gallery for more pictures of Mesh dishes!
WSI LNBF Collar KU2C3 for Prime Focus Dishes Speakers (WSI)
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