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Ku band direct satellite broadcast television, also called Direct Broadcast Satellite or DBS is named for the letter designation of the 12 GHz band in which it broadcasts. DBS is a mature but growing market; initial roll-out was in Europe and Japan; the US has recently come on-line with RCA/Hughes Direct TV. The higher frequency of operation allows the use of a relatively small (30 - 90 cm diameter) receiving dish or antenna.
Some systems are designed to receive more than one satellite, or input channels of two different polarities. These systems may require multiple LNA line-ups and high frequency switches. Other systems have multiple outputs to allow a single antenna to feed multiple television sets. These systems may make use of switches and dual channel IFs.
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