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earth station

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A transmitting/receiving station for satellite communications. It uses a dish-shaped antenna for microwave transmission. An earth station is generally made up of a multiplexor, modem, up and downconverters, a high power amplifier (HPA) and a low noise amplifier (LNA).

For digital data transmission to a satellite, data streams are combined in a multiplexing device, whose output goes to a modem for modulation onto a carrier frequency in the 50 to 180 MHz range. An upconverter bumps the carrier up into the gigahertz range, and the output goes to the HPA and dish.

For receiving, the LNA boost the signals to the downconverter, which lowers the frequency and sends it to the modem. The modem demodulates the carrier, and the digital output goes to the demultiplexing device and then to its destinations. See base station.

Earth Station
The earth station is no longer only the domain of commercial enterprises, now that millions of homes use small dishes to receive TV signals.



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Comtech Telecommunications Corporation (Nasdaq: CMTL - news) has announced that its Arizona subsidiary, Comtech EF Data Corporation, received a multi-million dollar order for satellite earth station transceivers and modems from Globecomm Systems, Inc (Nasdaq: GCOM), a leading global provider of end-to-end satellite-based communications solutions.
COMTECH TELECOMMUNICATIONS AWARDED MULTI-MILLION DOLLAR ORDER FOR ... by EDP Weekly's IT Monitor
Ventura County Planning Director Keith Turner granted the communications company giant an extension to 2005 to operate its Earth Station of 19 large antennae.
SATELLITE STATION GETS PERMIT OK by Daily News (Los Angeles, CA)
Andrew Corporation, a global leader in communications equipment and systems, has introduced two new earth station antenna (ESA) products designed to provide world class Andrew quality at prices competitive with less capable units available elsewhere.
Andrew Introduces Two Earth Station Products That Reduce Cost of ... by Business Wire
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