al_madhi
Regular Member
- Joined
- Apr 6, 2004
- Messages
- 118
- Reaction score
- 2
- Points
- 18
- Age
- 53
- My Location
- Riyadh - Saudi Arabia
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
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