What is the frequency range of UHF?

• A. 300 MHz - 3 GHz
• B. 30 kHz - 3 MHz
• C. 3 GHz - 30 GHz
• D. 300 Hz - 3 kHz

Answer: (A)

UHF, or Ultra High Frequency, covers 300 megahertz up to 3 gigahertz. This boundary sits above the VHF band (which ends at 300 MHz) and below the microwave range that starts around 3 GHz. The familiar wavelength range here—from about 1 meter at the low end to roughly 10 centimeters at the high end—shapes antenna design and signal behavior, including how well signals propagate and what obstacles they can penetrate. The other options fall outside this band: 30 kHz to 3 MHz is well below UHF; 3 GHz to 30 GHz is beyond UHF into higher microwave frequencies; and 300 Hz to 3 kHz is in the extremely low-frequency region. Therefore, the correct range is 300 MHz to 3 GHz.