NDLI: Measured and predicted root-mean-square errors in square and triangular antenna mesh facets

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Measured and predicted root-mean-square errors in square and triangular antenna mesh facets

Content Provider	NASA Technical Reports Server (NTRS)
Author	Fichter, W. B.
Copyright Year	1989
Description	Deflection shapes of square and equilateral triangular facets of two tricot-knit, gold plated molybdenum wire mesh antenna materials were measured and compared, on the basis of root mean square (rms) differences, with deflection shapes predicted by linear membrane theory, for several cases of biaxial mesh tension. The two mesh materials contained approximately 10 and 16 holes per linear inch, measured diagonally with respect to the course and wale directions. The deflection measurement system employed a non-contact eddy current proximity probe and an electromagnetic distance sensing probe in conjunction with a precision optical level. Despite experimental uncertainties, rms differences between measured and predicted deflection shapes suggest the following conclusions: that replacing flat antenna facets with facets conforming to parabolically curved structural members yields smaller rms surface error; that potential accuracy gains are greater for equilateral triangular facets than for square facets; and that linear membrane theory can be a useful tool in the design of tricot knit wire mesh antennas.
File Size	9610709
Page Count	16
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19890008521
Archival Resource Key	ark:/13960/t1wd8rv2k
Language	English
Publisher Date	1989-03-01
Access Restriction	Open
Subject Keyword	Structural Mechanics Root-mean-square Errors Reflectors Error Analysis Deflection Antenna Design Fabrics Eddy Currents Antenna Radiation Patterns Structural Analysis Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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