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Satellite TV receivers & systems support forums
Satellite Systems - What to Buy - What to install
Make Gregorian dish
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<blockquote data-quote="RimaNTSS" data-source="post: 901563" data-attributes="member: 312276"><p>Ellipse <a href="http://mathworld.wolfram.com/Ellipse.html" target="_blank">http://mathworld.wolfram.com/Ellipse.html</a></p><p>In that geometrical figure pay attention to two dots inside Ellipse- Foci (F1 and F2). In our Gregory antenna system those two dots will be crucially important. All radiation from satellite, reflected from main mirror will go through F1, reflects from SUB (shaped as part of rotatory ellipsoid) and comes together in F2 where LNB is located. Forgot to tell, we better calculate our SUB to be used together with Inverto Black Ultra (IBU). This is most affordable and good LNB on today's market.</p></blockquote><p></p>
[QUOTE="RimaNTSS, post: 901563, member: 312276"] Ellipse [url]http://mathworld.wolfram.com/Ellipse.html[/url] In that geometrical figure pay attention to two dots inside Ellipse- Foci (F1 and F2). In our Gregory antenna system those two dots will be crucially important. All radiation from satellite, reflected from main mirror will go through F1, reflects from SUB (shaped as part of rotatory ellipsoid) and comes together in F2 where LNB is located. Forgot to tell, we better calculate our SUB to be used together with Inverto Black Ultra (IBU). This is most affordable and good LNB on today's market. [/QUOTE]
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Satellite Systems - What to Buy - What to install
Make Gregorian dish
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