In which band is a Yagi antenna commonly used according to the material?

In which band is a Yagi antenna commonly used according to the material?

• A. KA band
• B. UHF
• C. SHF
• D. VHF

Answer: (B)

A Yagi antenna is a simple, directional high-gain radiator whose elements scale with wavelength. At UHF frequencies, the driven element, reflector, and directors are large enough to be practical to build and adjust, yet not so large that they become unwieldy. This balance makes a Yagi an efficient, cost-effective choice for many terrestrial links where you want a focused beam and good gain without the complexity of more advanced antennas. At VHF, the same gain would require very long elements, making the antenna bulky; at SHF and higher bands, other options like dishes or horn arrays are more common because they can achieve higher performance in a more compact form. So, in typical material contexts, the Yagi is commonly associated with UHF for its practical size and decent directional performance.

A Yagi antenna is a simple, directional high-gain radiator whose elements scale with wavelength. At UHF frequencies, the driven element, reflector, and directors are large enough to be practical to build and adjust, yet not so large that they become unwieldy. This balance makes a Yagi an efficient, cost-effective choice for many terrestrial links where you want a focused beam and good gain without the complexity of more advanced antennas. At VHF, the same gain would require very long elements, making the antenna bulky; at SHF and higher bands, other options like dishes or horn arrays are more common because they can achieve higher performance in a more compact form. So, in typical material contexts, the Yagi is commonly associated with UHF for its practical size and decent directional performance.