Category Archives: Antenna and wave propagation

Modes of wave propagation

There are four major modes that the waves transmitted from a transmitter may follow to reach the destination and they are (a) Surface wave propagation (b) Space wave propagation (c) Troposphere propagation (d) Ionosphere propagation.

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Electric field intensity at finite distance from transmitter Antenna

Let us derive the relation of electric field intensity at finite distance from transmitter Antenna If a horizontal Hertzian dipole antenna is used as a transmitter antenna above the horizon, then energy will travel like a wave in free space. … Continue reading

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FRIIS FREE SPACE EQUATION

Today we will discuss a very important relation related to wave propagation. The equation is known as Friis free space equation. As only a small fraction of radiated power is received at the receiver from an isotropic radiator in free … Continue reading

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Transmission of radio waves

When a radio wave is radiated from the transmitting antenna, it spreads in all directions with decrease in amplitude with increasing distance because of spreading of the electromagnetic energy through larger surface areas and it follows inverse square law. This … Continue reading

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