Accession Number : AD0893358

Title :   Advanced Composite Material Study for Millimeter Wavelength Antennas. Volume II. Environmental Tests.

Descriptive Note : Final technical rept. Feb 70-Oct 71,

Corporate Author : GOODYEAR AEROSPACE CORP AKRON OHIO

Personal Author(s) : Haylett,James W. ; Welling,C. E. ; Whitacre,R. E.

Report Date : OCT 1971

Pagination or Media Count : 50

Abstract : The purpose of this program was to conduct a theoretical and experimental exploratory development program to establish the required technology to design, fabricate, and test reliable flightworthy advanced composite, extremely high frequency (ehf) ANTENNAS FOR SPACE SYSTEMS APPLICATIONS. The environmental tests conducted as part of this program are reported. Laminate of graphite/epoxy 75S/ERLB 4617 material was selected for the millimeter wavelength antenna. The selected material was fabricated into test specimens which were exposed to vacuum, UV and gamma radiation. After exposure the specimens were subjected to temperature cycling, thermal coefficient of expansion and microwave reflectivity tests. No degradation was noted as a result of these tests. No significant changes were detected as a result of the environmental exposure. It was concluded, as a result of these limited tests, that the selected materials were excellent candidates for a millimeter wavelength space antenna. (Author, modified-PL)

Descriptors :   (*RADAR ANTENNAS, *COMPOSITE MATERIALS), MILLIMETER WAVES, PHASED ARRAYS, PARABOLIC ANTENNAS, GAMMA RAYS, ULTRAVIOLET RADIATION, EXTREMELY HIGH FREQUENCY, GRAPHITE, CARBON FIBERS, REINFORCED PLASTICS, HONEYCOMB CORES, LAMINATES, THERMAL EXPANSION, REFLECTORS, SANDWICH CONSTRUCTION, EPOXY RESINS, ANTENNA FEEDS, VACUUM, HUMIDITY, NICKEL, MICROWAVES

Subject Categories : Laminates and Composite Materials
      Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE