NDLI: The Effective Number of Pulses Per Beamwidth for a Scanning Radar

Content Provider	IEEE Xplore Digital Library
Author	Blake, L.V.
Copyright Year	1931
Abstract	The effective number of pulses received when a radar scans past a target is analyzed in terms of the integration of a train of pulses of amplitudes determined by the antenna beam pattern. It has been customary to take for this number the pulses occurring in the half-power beamwidth, ß, and to assume that these pulses were all of full (mid-beam) amplitude (this assumption roughly compensating for the discard of pulses outside the half-power points). The present analysis is based on the existence of an optimum integration angle, which gives a greater improvement of signal-to-noise ratio than integration over greater or lesser arcs. This optimum is found to be 0.84ß for a Gaussian-shaped beam. Integration over this angle gives the same signal-to-noise improvement as integration over a rectangular-shaped beam of width 0.47ß. Thus the equivalent number of full-amplitude pulses is 0.47 times the number usually assumed, representing a reduction in calculated radar system sensitivity of 1.6 db.
Starting Page	770
Ending Page	774
Page Count	5
File Size	1129347
File Format	PDF
ISSN	00968390
Volume Number	41
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1953-06-01
Access Restriction	Subscribed
Rights Holder	The Institute of Radio Engineers, Inc. (IRE)
Subject Keyword	Radar antennas Signal to noise ratio Gaussian processes Pattern analysis Receiving antennas Signal analysis Frequency Gain Signal detection Laboratories
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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