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Dish Shapes

Discussion in 'General Satellite Discussion' started by kevinturcotte, Nov 9, 2009.

  1. kevinturcotte

    kevinturcotte Active Member

    3,957
    1
    Dec 19, 2006
    Outside...
    I was wondering why there are difference dish shapes? Talking about the square and the rectangle dishes. Also seen some, I think they're in a hexagon shape? Why aren't all dishes round or oval?
     
  2. Scott in FL

    Scott in FL Godfather

    427
    0
    Mar 18, 2008
    With small antennas, I think the main reason is marketing. The gain of an antenna is determined by the reflector's surface area and its ability to efficiently reflect the signal to one focal point -- where the LNA or LNB is located. The shape doesn't matter.

    One small antenna exception is the flat panel antenna. This antenna has no focal point and no LNA or LNB on an arm. Instead, the antenna's surface is embedded with many tiny antennas that add together. Changing the phase and amplitude of these signals determines the directionality (pointing) of the antenna. Flat panel antennas are often square or rectangular. I used to work for the company that invented the flat panel antenna.

    As far as large antennas go, I have worked with hexagonal antennas that were built in such a way that the six panels were easy to transport and assemble in the field.
     
  3. Ivtec

    Ivtec AllStar

    69
    0
    Jan 9, 2009
    My freind can you please give me some good advice on this antenna that i aquire for AMC4 101W.I thought that it was 32 "round but i measured it and it has 32" tall and 30"wide,i'm trying to set it here in Mas area i got a Invacon Quad with linear and circular,get no sgnificant signal on the sat finder,on the elevation 33.some thing is not right,should i use more elevation, is the marks on this dish are not right?do i use the midle of the bolt to set the elevation on the mark?i apeciate your help, any help is well come,i don't want to spend any more money on thios proget as i already did, i'm fad up going up on the tall and danger roof.
     
  4. P Smith

    P Smith Mr. FixAnything

    22,617
    241
    Jul 25, 2002
    W.Mdtrn Sea
    Spend another $20 for simple Satfinder !
     

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