Interference type radiation attenuator

Details Interference type radiation attenuator Interference type radiation attenuator

1968-07-08

1997-05-06

Sotomayor, John B.

Communications: directive radio wave systems and devices (e.g.,

Radio wave absorber

342 4, H01Q 1700

Patent

active

056275412

ABSTRACT:
An attenuator of electromagnetic radiation, such as radar, is described wherein a single attenuator sheet in the nature of "spacecloth" is placed in front of a plurality of reflective layers wherein each of the reflective layers is tuned to reflect a narrow band of radiation of a selected frequency and transmit other frequencies; and each of the reflective layers is spaced from the attenuation layer at a distance of one-fourth of the wavelength of electromagnetic radiation to which it is tuned. In a preferred embodiment each of the reflective layers comprises elongated narrow conductive areas arranged in spaced apart columns and rows in a generally non-conductive area.

REFERENCES:
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patent: 2877286 (1959-03-01), Vance et al.
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patent: 3349397 (1967-10-01), Rosenthal
patent: 3431348 (1969-03-01), Nellis et al.
patent: 3453620 (1969-07-01), Fleming et al.
patent: 3662387 (1972-05-01), Grimes
patent: 3680107 (1972-07-01), Meinke et al.

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