Define high frequency [HF] and super high frequency [SHF], which devices uses these frequencies

Define high frequency [HF] and super high frequency [SHF], which devices uses these frequencies

High Frequency:
.........HF uses ionospheric propagation. These frequencies move into the ionosphere where the density difference reflects them back on earth. It is used for Citizen’s Band Radio, International Broadcasting, Military Communication, Telephone, Telegraph and Fax Super high frequency. SHF waves are TX using mostly line-of-sight and some Space propagation. It is used for Terrestrial and Satellite Microwave and Radar Communication devices.