Radio-frequency reflective fabric

Details Radio-frequency reflective fabric Radio-frequency reflective fabric

1987-11-23

1989-09-19

Hille, Rolf

Communications: radio wave antennas

Antennas

Antenna components

343897, 343915, H01Q 1514

Patent

active

048685801

ABSTRACT:
A radio-frequency reflective surface is made of a fabric woven from a yarn having an effective coefficient of thermal expansion of substantially zero over a useful temperature range. The yarn comprises a metallic filament around which non-metallic rovings are wound. The coefficients of thermal expansion of the filament and the roving material are related to each other so that mechanical strain thermally induced in the filament by changes in temperature is counteracted by mechanical strain thermally induced in the rovings. Intermodulation products at yarn intersections of the fabric are substantially zero.

REFERENCES:
patent: 2412562 (1946-12-01), Crawshaw
patent: 2494255 (1950-01-01), Morris et al.
patent: 2840819 (1958-06-01), McClellan
patent: 2989746 (1961-06-01), Ramsay
patent: 3047860 (1962-07-01), Swallow et al.
patent: 4092453 (1978-05-01), Jonda
patent: 4764779 (1988-08-01), Sato et al.

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