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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
Motorized offset dish by Rotating the LNB inside a fixed sphere
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<blockquote data-quote="al_madhi" data-source="post: 178878" data-attributes="member: 179100"><p>Hi , ppl from the plane geometry offset antenna sections cut from larger circular parabolic antenna the same way as sphere shape . Therefore if you look at the attached file you will see what I am planning to design , which is a motorized offset dish , but not by the conventional way , rotating the dish but rotating the LNB instead of the dish , and making the dish is fixed .</p><p></p><p>The LNB is fastened by two shaft drives , one rotated horizontall and the other one rotates vertically . The sphere's diameter is 180 cm, 240 cm or 360 cm , and its surface is made of thin plastic do that the electromagnetic waves can penetrate without obstruction . , The inside surface of the sphere is painted like mirror paint . By doing so the sun rays cannot penetrate inside the sphere to burn the LNB .</p><p></p><p>Rotating the LNB inside the spherical mirror the LNB is scanning the surface of the sphere in a such a way selecting different sections , i.e. different offset dishes facing different satellites , similar if you are rotating one offset dish across the Clarke belt from East to West .</p><p></p><p>Please give your comments whether it can be done or not .</p><p></p><p></p><p></p><p>Best Regards</p></blockquote><p></p>
[QUOTE="al_madhi, post: 178878, member: 179100"] Hi , ppl from the plane geometry offset antenna sections cut from larger circular parabolic antenna the same way as sphere shape . Therefore if you look at the attached file you will see what I am planning to design , which is a motorized offset dish , but not by the conventional way , rotating the dish but rotating the LNB instead of the dish , and making the dish is fixed . The LNB is fastened by two shaft drives , one rotated horizontall and the other one rotates vertically . The sphere's diameter is 180 cm, 240 cm or 360 cm , and its surface is made of thin plastic do that the electromagnetic waves can penetrate without obstruction . , The inside surface of the sphere is painted like mirror paint . By doing so the sun rays cannot penetrate inside the sphere to burn the LNB . Rotating the LNB inside the spherical mirror the LNB is scanning the surface of the sphere in a such a way selecting different sections , i.e. different offset dishes facing different satellites , similar if you are rotating one offset dish across the Clarke belt from East to West . Please give your comments whether it can be done or not . Best Regards [/QUOTE]
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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
Motorized offset dish by Rotating the LNB inside a fixed sphere
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