Angular-diversity radiating system for tropospheric-scatter radi

Details Angular-diversity radiating system for tropospheric-scatter radi Angular-diversity radiating system for tropospheric-scatter radi

1987-06-18

1988-10-11

Sikes, William L.

Communications: radio wave antennas

Antennas

Wave guide type

343781GA, 343781P, H01Q 1914

Patent

active

047774916

ABSTRACT:
An angular-diversity radiating system is described for tropospheric-scatter radio links which accomplishes a symmetrical Cassegrain optic in transmission and is parabolic with a central focus in reception, respectively. This is accomplished by a subreflector formed of parallel metal conductors and shaped with a hyperbolic profile which is centered on the axis of the main reflector at a predetermined distance between the transmitting horn and the receiving horns. The electromagnetic waves leaving the transmitting horn and directed toward the subreflector are polarized with the electric field vector parallel to the metal conductors of the subreflector such as to be reflected toward the main reflector which reradiates them. The electromagnetic waves received are polarized orthogonally to the transmitted waves and thus pass undisturbed through the subreflector to reach the receiving horns. The invention also permits continuous adjustment of the vertical distance between the receiving horns in order to optimize the diversity angle.

REFERENCES:
patent: 3307183 (1967-02-01), Adam
patent: 4017865 (1977-04-01), Woodward
patent: 4355314 (1982-10-01), Ohm
patent: 4573051 (1986-02-01), Farina

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