satellite dishes

I'd like to read about satellite dishes as devices in their own right, rather than from the standpoint of their applications. In other words, their design, construction, circuitry (simple as it probably is), characteristics and anything else you might want to know before connecting them to a circuit. I've been searching on the web and basically what I find are sites that will sell or lend you a satellite dish for some application, or which will advise you on how to select one for that purposes. I don't find sites that simply talk about what it is in all detail and what you can get away with in building or using one. If there is a book devoted to this, I'd like to know about it, but maybe that's like asking for a book on what a resistor is.

I think that a satellite dish is basically a certain kind of antenna with some additional circuitry that one doesn't find in other antennas and maybe also some mechanical features such as motors to control its orientation. I don't know if all of that would be adequately described in a book on antennas.

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Ignorantly,
Allan Adler 
* Disclaimer: I am a guest and *not* a member of the MIT CSAIL. My actions and
* comments do not reflect in any way on MIT. Also, I am nowhere near Boston.
Reply to
Allan Adler
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Yes, it's basically an antenna with a built-in amplifier, in most cases. The reflector is either parabolic or spherical (both should be discussed in any decent book covering antennas for UHF and above), and that reflector directs signals to one of several possibilities at its focus. Whatever picks up the signal there (for really high frequency stuff, often a horn feeding into a waveguide), it generally winds up going through an "LNA" (low-noise amplifier, or sometimes referred to as an "LNB," low-noise buffer) for amplification before being stuffed into the cable to be sent to the receiver. In some more elaborate systems at the really high frquencies, the signal may be downconverted at the antenna, so what winds up on the cable isn't the same frequency stuff as what comes into the reflector in the first place.

Bob M.

and

Boston.

Reply to
Bob Myers

The dish is just a dish antenna; the system is 'different'. Anyway, semantics aside, a good reference book wood be Satellite Communications by Roddy

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If you just want to surf for the moment, have you seen this page:
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Ken

Reply to
Ken Taylor

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