What happens to SWR bandwidth when one or more loading coils are used to resonate an electrically short antenna?
It is increased
It is decreased✓Правильный ответ
It is unchanged if the loading coil is located at the feed point
It is unchanged if the loading coil is located at a voltage maximum point
Объяснение
A loading coil restores resonance at one frequency by cancelling a reactance that changes very rapidly with frequency on a short antenna. That rapid change is high Q, so the range over which SWR stays low narrows, no matter where the coil is placed.