Communications: radio wave antennas – Antennas – With polarization filter or converter
Patent
1975-03-17
1976-07-13
Lieberman, Eli
Communications: radio wave antennas
Antennas
With polarization filter or converter
343100SA, 343768, 343777, 343854, H01Q 326
Patent
active
039697290
ABSTRACT:
An integral element/phase shifter for use in a phase scanned array. A non-resonant waveguide or stripline type transmission line, series force feeds the elements of an array. In the embodiments shown, four RF diodes are arranged in connection within the slots of a symmetrical slot pattern in the outer conductive wall of the transmission line to vary the coupling therefrom through the slots to the aperture of each individual antenna element. Each diode thus controls the contribution of energy from each of the slots (at a corresponding phase) to the individual element aperture and therefore determines the net phase of the said aperture. Three species of the invention are shown, the first and second involving RF diodes in the slots of waveguide broad and narrow walls respectively, and the third having slots through the shield plane of a stripline. The invention facilitates array phase scanning without the need for separate, and relatively more expensive, discrete phase shifters for each antenna element.
REFERENCES:
patent: 3604012 (1971-09-01), Lindley
International Telephone and Telegraph Corporation
Lieberman Eli
O'Neil William T.
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