Which term describes an antenna designed to operate effectively over a wide frequency range?

Which term describes an antenna designed to operate effectively over a wide frequency range?

• A. Non-resonant antenna.
• B. Resonant antenna.
• C. Isotropic antenna.
• D. Field expedient antenna.

Answer: (A)

A non-resonant antenna is designed to operate over a wide frequency range. Because it isn’t tuned to a specific resonance, its impedance and radiation characteristics remain usable across a broad band, unlike a resonant antenna whose performance is centered around one frequency and tends to narrow outside that range. The isotropic antenna is a theoretical concept describing equal radiation in all directions, not about bandwidth, and a field expedient antenna is a temporary, improvised solution whose primary concern is quick deployment rather than broad bandwidth. Therefore, the term that best describes an antenna designed to work effectively over a wide frequency range is non-resonant.

A non-resonant antenna is designed to operate over a wide frequency range. Because it isn’t tuned to a specific resonance, its impedance and radiation characteristics remain usable across a broad band, unlike a resonant antenna whose performance is centered around one frequency and tends to narrow outside that range. The isotropic antenna is a theoretical concept describing equal radiation in all directions, not about bandwidth, and a field expedient antenna is a temporary, improvised solution whose primary concern is quick deployment rather than broad bandwidth. Therefore, the term that best describes an antenna designed to work effectively over a wide frequency range is non-resonant.