Discussion
What happens to the input impedance of a dipole as its length approaches one wavelength?
Answer: A
At a full wavelength the current at the feed point is a minimum of the standing wave, so the impedance rises to several thousand ohms, which is very hard to match. This is why full wave dipoles are fed off centre or at a current maximum instead. The impedance passes through resonances every half wavelength, alternating between low values at current maxima and very high ones at current minima, and knowing where the feed point falls on the standing wave predicts the whole behaviour.
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