Discussion
What is a Gregorian reflector?
Answer: A
The Gregorian uses an ellipsoidal subreflector placed beyond the prime focus, giving a real intermediate image and a slightly longer structure than the Cassegrain. Both fold the path to bring the feed to the vertex, and shaped versions of either can reach seventy per cent aperture efficiency. Shaped single reflectors, axial waveguide feeds and subreflector positioning conventions are all related ideas but none of them is the definition. The choice between the two is usually made on mechanical and cross polar grounds.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development