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Fringe Reception General
61.5w
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<blockquote data-quote="Hitchcock" data-source="post: 137184" data-attributes="member: 196478"><p>The only useful <a href="http://www.mlesat.com/Article1.html" target="_blank">link</a> I've managed to google on this subject turns up this:</p><p></p><p>"Although standard linear feedhorns can still pick up any circular polarized signal, half of the available signal power will be lost."</p><p></p><p>Half the signal (3 d<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite6" alt=":cool:" title="Cool :cool:" loading="lazy" data-shortname=":cool:" /> is substantial, to say the least!</p><p></p><p>I also found that <a href="http://www.invacom.com/products.htm" target="_blank">Invacom</a> apparently do a combined version, one which outputs all 4 polarizations at once: Left-Hand, Right-Hand, Horizontal and Vertical. And amazingly enough, they also produce one in <strong>C120</strong>! Note however, this one's not really of interest for receiving European linearly polarized satellites, as the frequencies are limited to the higher bands only (11,700 — 12,700 MHz).</p></blockquote><p></p>
[QUOTE="Hitchcock, post: 137184, member: 196478"] The only useful [URL=http://www.mlesat.com/Article1.html]link[/URL] I've managed to google on this subject turns up this: "Although standard linear feedhorns can still pick up any circular polarized signal, half of the available signal power will be lost." Half the signal (3 dB) is substantial, to say the least! I also found that [URL=http://www.invacom.com/products.htm]Invacom[/URL] apparently do a combined version, one which outputs all 4 polarizations at once: Left-Hand, Right-Hand, Horizontal and Vertical. And amazingly enough, they also produce one in [B]C120[/B]! Note however, this one's not really of interest for receiving European linearly polarized satellites, as the frequencies are limited to the higher bands only (11,700 — 12,700 MHz). [/QUOTE]
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Satellite TV receivers & systems support forums
Fringe Reception General
61.5w
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