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) waves.

Cables can also be used to transmit signals via microwave; television uses 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 short-wave radio tower depends on factors such as wavelength (frequency), ground conductance coefficient, and propagation distance; for radio towers used in ultra-short waves and microwaves, the height is determined accordingly.

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

Flat or slightly undulating terrain; transmission distance can be calculated according to the following formula (km): where HT is the height of the transmitting antenna; HR is 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 propagation distance calculated by the above formula.