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A typical value for a consumer type 60 cm satellite dish at 11.75 GHz is 37.50 dB. With lower frequencies, C-band for example, dish designers have a wider choice of materials. The large size of dish required for lower frequencies led to the dishes being constructed from metal mesh on a metal framework.
At 4 GHz (C-band) a 3-meter dish is required to achieve this narrow angular resolution. Note the inverse linear correlation between dish size and frequency. For K u satellites in DBS (Direct Broadcast Satellite) service (12.2-12.7 GHz in the U.S.) dishes much smaller than 1-meter can be used because those satellites are spaced 9 degrees apart.
The satellite communications portion of the C band is highly associated with television receive-only satellite reception systems, commonly called "big dish" systems, since small receiving antennas are not optimal for C band. Typical antenna sizes on C-band-capable systems range from 6 to 12 feet (1.8 to 3.5 meters) on consumer satellite dishes ...
Early satellite television systems were not very popular due to their expense and large dish size. [68] The satellite television dishes of the systems in the late 1970s and early 1980s were 10 to 16 feet (3.0 to 4.9 m) in diameter, [69] made of fibreglass or solid aluminum or steel, [70] and in the United States cost more than $5,000, sometimes ...
S-band tracking antenna at Kennedy Space Center A Indovision (now MNC Vision) 80cm S-band satellite dish. In the United States, the FCC approved satellite-based Digital Audio Radio Service (DARS) broadcasting in the S band from 2.31 to 2.36 GHz in 1995, [2] used by Sirius XM Radio. More recently, it has approved portions of the S band between 2 ...
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 Minidish is an oval, mesh satellite dish capable of reflecting signals broadcast in the upper X band and K u band. Two sizes exist: "Zone 1" dishes are issued in southern and Northern England and parts of Scotland and were 43 cm vertically prior to 2009; newer mark 4 dishes are approximately 50 cm
The footprint of a communications satellite is the ground area that its transponders offer coverage, and determines the satellite dish diameter required to receive each transponder's signal. There is usually a different map for each transponder (or group of transponders), as each may be aimed to cover different areas.