Discussion
Why does a leaky wave antenna scan its beam with frequency?
Answer: B
The beam points where the radiated contributions add in phase, and that angle depends on the ratio of the free space wavenumber to the guide wavenumber, which changes with frequency. Tuning therefore steers the beam without any phase shifters at all. Element resonance, feed delay and attenuation shifts are secondary effects. Frequency scanning is a cheap form of electronic steering, limited by the fact that the frequency is then no longer free to be used for anything else.
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