Communications: radio wave antennas – Antennas – Wave guide type
Patent
1985-10-01
1987-10-13
Sikes, William L.
Communications: radio wave antennas
Antennas
Wave guide type
343872, 343878, 343DIG2, H01Q 1300
Patent
active
047001950
ABSTRACT:
A waveguide-fed horn structure includes a constraining mechanism having an extremely high degree of dimensional stability over a wide thermal range. The constraining mechanism comprises a composite graphite honeycomb structure that forms a support backing for the waveguide feed and for the conductive surface sections of the horn radiator. The conductive surface of the horn radiator is supported on a first section of graphite epoxy laminate while a second section of graphite epoxy laminate supports the honeycomb backing and is bonded to the first section of laminate, thereby effectively surrounding the feed-horn structure with a thermally tolerant, physical distortion constraining support. The graphite epoxy support provides sufficient mass and mechanical stiffness to prevent performance degrading distortion of both the waveguide feed and the horn radiator surface in spite of the severe transient thermal conditions encountered in a spaceborne environment, thereby maintaining structural integrity of the components of the structure during extreme thermal cycling conditions (full sun to no sun).
REFERENCES:
patent: 3860933 (1975-01-01), Terakawa et al.
patent: 4246584 (1981-01-01), Noerpel
patent: 4477816 (1984-10-01), Cho
patent: 4517571 (1985-05-01), Mulliner et al.
Boan Bobby J.
Croswell William F.
Harris Corporation
Sikes William L.
Wise Robert E.
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