Satellite dishes receive signals from orbiting satellites and pick up channels for satellite television. They are made up of a spherical or parabolic dish, feedhorn, and a low-noise block downconverter (LNB). The feedhorn, located at the focal point of the dish, gathers the signals and feeds them to the LNB, which then converts them into electrical signals that can be read by the TV receiver.
These satellite dishes measure eight to 12 feet across. They operate at the IEEE C-band, also known as the compromise band, which has a frequency of 3.7 to 4.2 GHz.
Ku-band antennas
Ku-band antennas are about three feet in diameter. They receive at frequencies between 12 to 18 GHz. This range is called the Ku band.
Direct satellite service (DSS) dishes
DSS dishes measure about 18 inches across. They are mostly used for digital broadcasts and signals from DirecTV and United States Satellite Broadcasting (USSB).
Size: Choose a small satellite dish to reduce the surface area that is open to damage. Small DSS-size dishes should do for most homes. Generally, satellite dishes for home use should not be visible from the street.
Material: Choose a satellite dish made of durable, weather resistant material. Make sure it can mount firmly onto your roof and will not dent or crack with strong winds. Fiberglass dishes usually stand up to harsh weather and offer great reflectivity.
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