Discussion
Why is a practical half wave dipole cut slightly shorter than half a wavelength?
Answer: A
At exactly half a wavelength the impedance is inductive, so shortening by around five per cent, more for a thick element, cancels the reactance and leaves a purely resistive feed. The resistance falls only slightly and certainly not to fifty ohms, the pattern is essentially unchanged over such a small adjustment, and conductor loss is negligible in either case. The shortening factor depends on the length to diameter ratio, which is why thick elements need more of it.
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