Spatially selective device for the absorption of electromagnetic

Details Spatially selective device for the absorption of electromagnetic Spatially selective device for the absorption of electromagnetic

1990-12-04

1992-01-14

Hille, Rolf

Communications: radio wave antennas

Antennas

With spaced or external radio wave refractor

343753, H01Q 15040, H01Q 19060

Patent

active

050814656

ABSTRACT:
Disclosed is a device designed to selectively absorb the electromagnetic waves coming from multiple reflections in a microwave lens. In an antenna of the type including an energy source and a lens, where the lens is formed by a plurality of parallel channels separated by conductive planes, the device has a slot made in each of the conductive planes, arranged on the input face side of the lens, and also has localized or distributed resistors connecting the two edges of the slot. The geometry of the entire unit, and the values of the resistors are such that the waves coming from multiple reflections are absorbed by the resistors.

REFERENCES:
patent: 4320404 (1982-03-01), Chekroun
patent: 4447815 (1984-05-01), Chekroun et al.
patent: 4480258 (1984-10-01), Wren
patent: 4975712 (1990-12-01), Chen
Electronics and Communications in Japan, vol. 60-B, No. 7, Jul. 1977; Takashima et al., "A Design Method of Electromagnetic Absorbing Walls with Resistive Sheets".

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