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Satellite TV receivers & systems support forums
Fringe Reception General
61.5w
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<blockquote data-quote="Orthoclipse" data-source="post: 137083" data-attributes="member: 190790"><p>You can buy LNBFs in the US which are designed for circularly polarised signals in the Ku-band with a dielectric plate in the feedhorn throat. Invacom also stock them I think. But they are mostly designed for offset dishes, so whatever you gain from the plate, will be cancelled by the mismatch of the offset feed and prime dish.</p><p></p><p>Perhaps a simpler method would be to attach a plate externally to the feedhorn. The pic below shows how this can be done for a C-feedhorn, although it might be trickier for a smaller Ku feed.</p><p>h**p://shop.store.yahoo.com/hightech/dielinforadl.html</p><p></p><p>Alternatively, if you have a receiver with mech. polariser control, Chaparral have a Ku feedhorn which comes with an optional teflon insert.</p><p>h**p://www.chaparral.net/products/feedhorns/ku.html</p></blockquote><p></p>
[QUOTE="Orthoclipse, post: 137083, member: 190790"] You can buy LNBFs in the US which are designed for circularly polarised signals in the Ku-band with a dielectric plate in the feedhorn throat. Invacom also stock them I think. But they are mostly designed for offset dishes, so whatever you gain from the plate, will be cancelled by the mismatch of the offset feed and prime dish. Perhaps a simpler method would be to attach a plate externally to the feedhorn. The pic below shows how this can be done for a C-feedhorn, although it might be trickier for a smaller Ku feed. h**p://shop.store.yahoo.com/hightech/dielinforadl.html Alternatively, if you have a receiver with mech. polariser control, Chaparral have a Ku feedhorn which comes with an optional teflon insert. h**p://www.chaparral.net/products/feedhorns/ku.html [/QUOTE]
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Satellite TV receivers & systems support forums
Fringe Reception General
61.5w
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