What is the feed point impedance of an end-fed half-wave antenna?
Very low
Approximately 50 ohms
Approximately 300 ohms
Very high✓پاسخ درست
توضیح
At the end of a resonant half-wave element the current is near zero while the voltage is at its maximum, and impedance is voltage divided by current, so the end feed point impedance is very high, typically a few thousand ohms.