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A satellite finder (or sat finder) is a satellite field strength meter used to accurately point satellite dishes at communications satellites in geostationary orbit. [ 14 ] [ 15 ] [ 16 ] Professional satellite finder meters allow better dish alignment and provide received signal parameter values as well.
In small dishes such as home satellite dishes, where the size of the feed structure is comparable with the size of the dish, this can seriously reduce the antenna gain. To prevent this problem these types of antennas often use an offset feed, where the feed antenna is located to one side, outside the beam area. The aperture efficiency for these ...
The dish had to be pointed directly at the satellite, with nothing blocking the signal. Weaker signals required larger dishes. [4] [5] [6] The dishes worked by receiving a low-power C-Band (3.7–4.2 GHz) frequency-modulated analog signal directly from the original distribution satellite – the same signal received by cable television headends.
The downlink satellite signal, quite weak after traveling the great distance (see path loss), is collected with a parabolic receiving dish, which reflects the weak signal to the dish's focal point. [11] Mounted on brackets at the dish's focal point is a device called a feedhorn or collector. [12]
A photo of all three BSB dishes available, the squarial, a Sky dish for comparison, the round BSB dish, and the square BSB dish. Unlike a normal satellite dish, which uses a parabolic reflector to focus the radio waves on a single feed horn antenna, the Squarial was a phased array antenna, a common design in which multiple small antennas work together to receive the waves. [1]
6x22m dish aperture synthesis array, operated by CSIRO as part of the ATNF (Australia Telescope National Facility). [28] Canberra Deep Space Communication Complex (CDSCC) Tidbinbilla, Australian Capital Territory 1x70 m dish, 3x34 m dishes, operated by CSIRO on behalf of NASA. [29] Ceduna Radio Observatory Ceduna, South Australia: 1.2–23 GHz