Primarily used in communication, broadcasting, television, radar, navigation, and remote sensing and control. Communication and broadcasting mainly utilize long wave, medium wave, and short wave (communication).

Cables can also transmit signals via microwave; televisions use ultra-short waves and microwaves for signal transmission; navigation primarily uses medium waves for signal transmission. Used for long waves, medium waves

The height of a shortwave radio tower depends on factors such as wavelength (frequency), ground conductivity, and propagation distance; for radio towers used for ultra-shortwave and microwave frequencies, the height is determined accordingly.

The transmission distance depends on. The transmission distance of ultra-short waves and microwaves is equal to the distance along the tangent of the ground surface from the transmitting antenna to the receiving antenna. For more

Flat or slightly undulating terrain; the transmission distance can be calculated according to the following formula (km). In the formula, HT represents the height of the transmitting antenna; HR represents the height of the receiving antenna.

Height (meters). A relay tower needs to be set up in the middle when the actual distance exceeds the transmission distance calculated by the above formula.