NDLI: Coincident arrays for the direct measurement of the principal solution in radio astronomy

Content Provider	IEEE Xplore Digital Library
Author	Utukuri, R. MacPhie, R.
Copyright Year	1963
Abstract	Multiplication techniques are used on a single array to synthesize a product pattern (effectively the product of the voltage patterns of two coincident arrays), which yields the principal solution when it scans a source distribution. A formula for the array-element weighting coefficients is obtained. The behavior of these coefficients for various array sizes is investigated. It is also shown that by using the same weighting coefficients with two separated arrays (forming the "elements" of an interferometer) one can synthesize a large aperture which also yields the principal solution. The output signal-to-noise performance of the coincident system is compared to that of the compound interferometer having almost the same power pattern. The improvement factor IF defined as the quotient of the output signal-to-noise ratios of the coincident system and the compound inteferometer, is shown to be always greater than unity and increases for increasing noise levels and array sizes.
Sponsorship	IEEE Antennas and Propagation Society
Starting Page	49
Ending Page	59
Page Count	11
File Size	674334
File Format	PDF
ISSN	0018926X
Volume Number	15
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1967-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Extraterrestrial measurements Radio astronomy Frequency Signal synthesis Signal to noise ratio Aperture antennas Filters Passband Brightness Linear antenna arrays
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering

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