Which type of radio frequency is typically used for short-range communications?

Ultra High Frequency (UHF) is typically used for short-range communications due to its propagation characteristics. UHF frequencies range from 300 MHz to 3 GHz and are particularly effective for line-of-sight communication, making them ideal for applications such as mobile communications, television broadcasting, and two-way radios.

The shorter wavelength of UHF signals allows for more efficient transmission and reception in urban environments where obstacles like buildings can block lower frequencies. This capability to penetrate or reflect off structures enhances UHF's effectiveness in short-range scenarios compared to longer frequency ranges.

UHF is favored in situations where compactness and portability are important, as the antennas required for these frequencies can be smaller and easier to handle. This makes UHF an optimal choice for a variety of communication devices used in homes, businesses, and emergency services, which often require reliable short-range communication.