Amplitude-comparison monopulse

Amplitude-comparison monopulse refers to a common direction finding technique.

This method is used in monopulse radar, electronic warfare and radio astronomy.

[1] Two overlapping antenna beams are formed, which are steered in slightly different directions, usually such that they overlap at the half-power point (-3 dB-point) of the beams.

An accuracy of a tenth of beamwidth can be achieved with an SNR of 10 dB.

The shape of the antenna beams must be known exactly and hence the accuracy of the techniques can be affected by unwanted multipath reflections.