What frequency range does UHF communications typically encompass?

UHF, or Ultra High Frequency, communications typically encompass a frequency range of 300 MHz to 3 GHz. This range is significant for various communication applications, including television broadcasting, mobile phones, and radar technology. The characteristics of UHF signals, such as their ability to penetrate buildings and their relatively short wavelength, make them very useful for urban communication as well as for military applications.

The other options represent different segments of the radio frequency spectrum. For instance, the range of 30 MHz to 300 MHz falls under the VHF (Very High Frequency) category, which is used for FM radio broadcasting and television. Similarly, the range from 3 GHz to 30 GHz is defined as SHF (Super High Frequency), which includes microwave communications and satellite transmissions. Lastly, the range from 30 kHz to 300 kHz is considered LF (Low Frequency), which is primarily used for long-range communications such as AM radio. Thus, option B correctly identifies the UHF range.