Line-of-sight propagation
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Line-of-sight propagation is a characteristic of electromagnetic radiation or acoustic wave propagation which means waves can only travel in a direct visual path from the source to the receiver withou
R is the radius of the Earth, h is the height of the transmitter (exaggerated), d is the line of sight distance
R is the radius of the Earth, h is the height of the ground station, H is the height of the air station d is the line of sight distance
Antenna (radio)
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In radio-frequency engineering, an antenna or aerial is a structure used to convert alternating electric currents into radio waves for transmission, and to convert radio waves back into electric curre
A television antenna used for reception of television signals in VHF
Antennas of the Atacama Large Millimeter/submillimeter Array
An automobile's whip antenna, a common example of an omnidirectional antenna
Half-wave dipole antenna