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Antenna Elevation pattern vs depression angle loss

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kishore2k4

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Hi,

In high gain omni directional antennas the elevation beamwidth is very small. My question is what happens if the receiver doesn't fall within the pattern boundaries and there is some angle difference, is the reception still possible?
 

Hi,
If the receiver radiation pattern maximum is entirely outside the transmitter beam, of course no currents are excited on the receiver antenna surface. In that case, it is like having an almost 0 effective area. You should try to let the receiver maximum gain to fall entirely within the ±3dB beamwidth of the trasmitter (or vice-versa).
Moreover, account for polarization characteristics of the two antennas. Try to match as much as possible the polarizations between trasmitter and receiver in order to reduce polarization losses.

Regards
 

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    kishore2k4

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the point of a radiation pattern is to describe how a system responds as the target moves around the receiver. In reality pattern boundaries are not rigid and there is usually detectable signal in all directions. Some directions have more response than other directions and this is the variation that a pattern depicts.

The underlying idea is that an antenna can receive a signal from any direction.
 

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    kishore2k4

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