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The size of the antenna needed for reception of satellites is a function of the power beam that "illuminate" the ground (Pire), which is explained in dBW, and the direction of these. A larger diameter antenna, the better reception. The correspondences between Pire and size of the antenna are shown as follows:
Power - Diameter
35 dBW 300 cm
36 dBW 240 cm
37 dBW 180 cm
38 dBW 150 cm
39 dBW 135 cm
40 dBW 120 cm
41 dBW 120 cm
42 dBW 110 cm
43 dBW 99 cm
44 dBW 90 cm
45 dBW 90 cm
46 dBW 80 cm
47 dBW 75 cm
48 dBW 60 cm
49 dBW 60 cm
50 dBW 60 cm
51 dBW 55 cm
52 dBW 50 cm
Therefore it is better to install an antenna a bit higher than recommended by the manufacturers with the right size. Thus, we have no reception problems in case of bad weather. Even if some broadcasters recommend small antennas for receiving signals, and especially in the case of more powerful satellites that broadcast digital channels (50 cm).
Diameter of antenna for a satellite with an eirp of 50 dBW), antenna is best to choose a few extra inches. However, it is advisable to "the higher the antenna, the better the reception" because a poor reception caused by a too small antenna has no solution.
Coverage areas (footprints, in English) of the beams from different satellites allow us a perfect identification of the technical characteristics of its distribution, ie, the boundaries of the territories for the beams and the gradient of power of the latter. To facilitate the identification of the emission power of the satellites.
Some satellites can alter the direction of their beams so these maps are purely indicative.
Power - Diameter
35 dBW 300 cm
36 dBW 240 cm
37 dBW 180 cm
38 dBW 150 cm
39 dBW 135 cm
40 dBW 120 cm
41 dBW 120 cm
42 dBW 110 cm
43 dBW 99 cm
44 dBW 90 cm
45 dBW 90 cm
46 dBW 80 cm
47 dBW 75 cm
48 dBW 60 cm
49 dBW 60 cm
50 dBW 60 cm
51 dBW 55 cm
52 dBW 50 cm
Therefore it is better to install an antenna a bit higher than recommended by the manufacturers with the right size. Thus, we have no reception problems in case of bad weather. Even if some broadcasters recommend small antennas for receiving signals, and especially in the case of more powerful satellites that broadcast digital channels (50 cm).
Diameter of antenna for a satellite with an eirp of 50 dBW), antenna is best to choose a few extra inches. However, it is advisable to "the higher the antenna, the better the reception" because a poor reception caused by a too small antenna has no solution.
Coverage areas (footprints, in English) of the beams from different satellites allow us a perfect identification of the technical characteristics of its distribution, ie, the boundaries of the territories for the beams and the gradient of power of the latter. To facilitate the identification of the emission power of the satellites.
Some satellites can alter the direction of their beams so these maps are purely indicative.