Electromagnetic energy shield

Details Electromagnetic energy shield Electromagnetic energy shield

1983-08-29

1997-04-15

Blum, Theodore M.

Communications: radio wave antennas

Antennas

Antenna components

343872, H01Q 1502, H01Q 1524

Patent

active

056214235

ABSTRACT:
A radome for providing a relatively wide-band operation which in a preferred embodiment uses at least a pair of panel means mounted adjacent each other, each having a plurality of discontinuous conductive elements applied to a selected surface thereof in an array of parallel paths. The discontinuous elements in each path of the array are interconnected by diode means which can be biased in a non-conductive direction during a first transmit mode and in a conductive direction during a second non-transmit mode. The panels are separated by a distance which is substantially equal to one quarter wave length (.lambda..sub.s /4) at a selected frequency within the wide pass-band of electromagnetic energy which is to be transmitted. The overall structure essentially operates as a wide band, low-pass transmission device transmitting energy at frequencies within the selected pass-band during the transmit mode and rejecting transmission at all frequencies within at least this same selected pass-band during the non-transmit mode.

REFERENCES:
patent: 3708796 (1973-01-01), Gilbert
patent: 3961333 (1976-06-01), Purinton
patent: 4212014 (1980-07-01), Chekroun

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