Communications: radio wave antennas – Antennas – Plural separate diverse type
Patent
1984-12-31
1987-06-09
Lieberman, Eli
Communications: radio wave antennas
Antennas
Plural separate diverse type
343786, 343829, H01Q 1302
Patent
active
046723846
ABSTRACT:
A radio frequency antenna is provided comprising: a waveguide section; first means for establishing radio frequency energy in such waveguide section having a first linear polarization with an electric field disposed normal to opposing wide walls of the waveguide section; a planar microwave circuit means, for establishing a second linear polarization having an electric field disposed perpendicular to the electric field of the first linear polarization, such microwave circuit means being disposed within the waveguide between the wide walls and relative to the feed means to provide the first linear polarization and the second linear polarization with substantially coincident phase centers. In a preferred embodiment of the invention, the microwave circuit means includes a strip conductor feed separated from a ground plane conductor by a dielectric, such ground plane conductor having a notch formed therein and fed by the strip conductor. More particularly, the dielectric is a planar sheet of dielectric material having the ground plane conductor formed on one surface thereof and the strip conductor feed formed on the other surface thereof. The first feed means launches the first linearly polarized energy with the electric field disposed in the E-plane of the waveguide and the planar dielectric sheet is disposed in the H-plane of the waveguide. The first feed means and the strip line feed are feed signals having a ninety degree phase shift therebetween. With such arrangement, a relatively simple feed structure is provided.
REFERENCES:
patent: 2825060 (1958-02-01), Ruze
patent: 3623112 (1971-11-01), Rupp
patent: 4141012 (1979-02-01), Hockham et al.
patent: 4218685 (1980-08-01), Frosch
patent: 4353072 (1982-10-01), Monser
patent: 4353074 (1982-10-01), Monser et al.
Monser George J.
Roy Albert A.
Devlin Peter J.
Lieberman Eli
Maloney Denis G.
Raytheon Company
Sharkansky Richard M.
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