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DISH SETUP: Single sat, Multi-Sat & Motorised
Which Is Better Ku-Lnb For Prime Focus 360Cm Sold ( 4 Pieces ) Dish Shown Below
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<blockquote data-quote="Channel Hopper" data-source="post: 812555" data-attributes="member: 175144"><p>A scalar feed is a 'compromise' device, improving the insertion loss by virtue of the radiation pattern of dual polarity reception from a parabolic source and offering at least two of the other factors below ;</p><p></p><p>1) optimising the transfer of wanted signal when the actual physical characteristics don't focus the signal to the phase centre </p><p>2) allowing a reasonable rejection of unwanted or spurious signal away from the phase centre</p><p>3) holding the waveguide and electronics to the focal point of the dish</p><p>4) withstanding outside physical elements - water, and heat, other outside elements from entering the waveguide and electronics. </p><p></p><p>For the physics required to build something that's 'the best' in all situations, impossible, but the attached article from 1999 does about the best in the majority of applications. Take note of the diagram (7) and the dimensions given which hold up well for many microwave frequencies. </p><p></p><p></p><p></p><p>I've mentioned scalar/choke parameters info before on the site. I'll have a look to see if it's around</p></blockquote><p></p>
[QUOTE="Channel Hopper, post: 812555, member: 175144"] A scalar feed is a 'compromise' device, improving the insertion loss by virtue of the radiation pattern of dual polarity reception from a parabolic source and offering at least two of the other factors below ; 1) optimising the transfer of wanted signal when the actual physical characteristics don't focus the signal to the phase centre 2) allowing a reasonable rejection of unwanted or spurious signal away from the phase centre 3) holding the waveguide and electronics to the focal point of the dish 4) withstanding outside physical elements - water, and heat, other outside elements from entering the waveguide and electronics. For the physics required to build something that's 'the best' in all situations, impossible, but the attached article from 1999 does about the best in the majority of applications. Take note of the diagram (7) and the dimensions given which hold up well for many microwave frequencies. I've mentioned scalar/choke parameters info before on the site. I'll have a look to see if it's around [/QUOTE]
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DISH SETUP: Single sat, Multi-Sat & Motorised
Which Is Better Ku-Lnb For Prime Focus 360Cm Sold ( 4 Pieces ) Dish Shown Below
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