Discussion
A pyramidal horn has an aperture of \( 10\lambda \times 7\lambda \) and 51 per cent efficiency. What is its gain?
Answer: B
Applying the aperture gain relation with the area expressed in square wavelengths:
\[ G = 4\pi \times 70 \times 0.51 \approx 449 \]
which is about 26.5 dBi. The efficiency of about half is characteristic of an optimum pyramidal horn and comes from the combination of the guide's amplitude taper and the residual phase error. Knowing that figure lets a horn's gain be estimated from its mouth dimensions alone, which is often all the information available.
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