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.[2] By comparing the relative amplitude of the pulse in the two beams, its position in the beams can be determined with an accuracy dependent on the signal-to-noise ratio (SNR). An accuracy of a tenth of beamwidth can be achieved with an SNR of 10 dB.
In most implementations, two signals are formed, one being the sum of the two beams, and the other being the difference of the two beams. The ratio of these two beams normalises the difference signal and allows the direction of arrival of the signal to be calculated. The shape of the antenna beams must be known exactly and hence the accuracy of the techniques can be affected by unwanted multipath reflections.[3]
^Barton, David; Sherman, Samuel (2011). Monopulse Principles and Techniques.
^Amplitude Comparison Monopulse - Introduction of Radar Analysis
^Amplitude-Comparison Monopulse 2016-03-04 at the Wayback Machine - Tracking Radar, Chap 18, p. 9
January 01, 1970
amplitude, comparison, monopulse, this, article, needs, additional, citations, verification, please, help, improve, this, article, adding, citations, reliable, sources, unsourced, material, challenged, removed, find, sources, news, newspapers, books, scholar, . This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources Amplitude comparison monopulse news newspapers books scholar JSTOR November 2010 Learn how and when to remove this message Amplitude comparison monopulse refers to a common direction finding technique This method is used in monopulse radar electronic warfare and radio astronomy Amplitude monopulse antennas are usually reflector antennas 1 Illustration of sum difference beamsApproach editTwo 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 2 By comparing the relative amplitude of the pulse in the two beams its position in the beams can be determined with an accuracy dependent on the signal to noise ratio SNR An accuracy of a tenth of beamwidth can be achieved with an SNR of 10 dB In most implementations two signals are formed one being the sum of the two beams and the other being the difference of the two beams The ratio of these two beams normalises the difference signal and allows the direction of arrival of the signal to be calculated The shape of the antenna beams must be known exactly and hence the accuracy of the techniques can be affected by unwanted multipath reflections 3 nbsp Two beams steered so that they overlap nbsp Sum of the two beam patterns nbsp Difference of the two beam patterns nbsp Ratio of the sum difference patternsSee also editMonopulse radar Phase Comparison MonopulseReferences edit Barton David Sherman Samuel 2011 Monopulse Principles and Techniques Amplitude Comparison Monopulse Introduction of Radar Analysis Amplitude Comparison Monopulse Archived 2016 03 04 at the Wayback Machine Tracking Radar Chap 18 p 9 Retrieved from https en wikipedia org w index php title Amplitude comparison monopulse amp oldid 1145201919, wikipedia, wiki, book, books, library,
