Electromagnetic energy shield

Details Electromagnetic energy shield Electromagnetic energy shield

1985-08-19

1987-08-04

Wise, Robert E.

Communications: radio wave antennas

Antennas

Antenna components

343754, 343872, 343908, H01Q 1502

Patent

active

046849548

ABSTRACT:
A radome shutter structure for preventing the transmission of electromagnetic energy within a selected frequency range and for permitting the transmission of energy outside such frequency range during a first mode of operation and for permitting the transmission of electromagnetic energy over a relatively wide frequency range which includes such selected frequency range during a second mode of operation. The structure includes an insulative substrate having a symmetrical array of metallized regions, each region preferably in the form of a Jerusalem Cross having discontinuous arms interconnected by diode elements which are placed in a conductive state in the first mode of operation and in a non-conductive state in the second mode of operation.

REFERENCES:
patent: 4419761 (1983-12-01), Noerpel
patent: 4518966 (1985-05-01), Sadones
patent: 4574288 (1986-03-01), Sillard et al.

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