The bandwidth of an antenna shortened with loading coils:

Get ready for the FCC General Radiotelephone Operator License (GROL) exam. Study with flashcards and multiple choice questions, each with hints and detailed explanations. Prepare effectively for your licensing test!

Multiple Choice

The bandwidth of an antenna shortened with loading coils:

When an antenna is shortened and uses loading coils, it’s brought to resonance at the operating frequency, but the coils add energy storage and raise the circuit’s quality factor (Q). A higher Q means the antenna responds strongly over a narrower range of frequencies, so the bandwidth is decreased. The increased reactive energy storage makes the impedance change more rapidly as you move off resonance, causing the performance to fall off quickly. So the shortened antenna with loading coils has a narrower bandwidth, not a wider or unchanged one.

When an antenna is shortened and uses loading coils, it’s brought to resonance at the operating frequency, but the coils add energy storage and raise the circuit’s quality factor (Q). A higher Q means the antenna responds strongly over a narrower range of frequencies, so the bandwidth is decreased. The increased reactive energy storage makes the impedance change more rapidly as you move off resonance, causing the performance to fall off quickly. So the shortened antenna with loading coils has a narrower bandwidth, not a wider or unchanged one.

More practice questions