Antenna arrangement for a radar surveillance method for target l

Details Antenna arrangement for a radar surveillance method for target l Antenna arrangement for a radar surveillance method for target l

1980-10-27

1982-10-05

Lieberman, Eli

Communications: radio wave antennas

Antennas

Wave guide type

343840, 343854, H01Q 324, H01Q 1915

Patent

active

043530737

ABSTRACT:
An antenna arrangement for a radar surveillance method for target locating having altitude acquisition provides that, for the purpose of level comparison, a plurality of overlapping lobes lying above one another are generated by a reflector rotating around a vertical axis together with a primary radiator row arranged essentially vertically. In employing a paraboloid of revolution as the reflector, a vertical primary radiator row is arranged around its focal point. Given more greatly deflected beams whose exciters are at a greater distance from the focal point, the gain in such an antenna decreases as the side lobes increase, limiting the elevation angle range. A single parabolic cylinder reflector generating a beam and focusing only in the horizontal plane is employed as the reflector, the individual radiators of a primary radiator row being arranged along its focal line. The horizontal extent of the primary radiators is so small and the vertical extent is so great that the desired bundling of the individual lobes lying one above another arises. The antenna arrangement according to the invention can be advantageously employed in an X-band radar having altitude acquisition.

REFERENCES:
patent: 2870441 (1959-01-01), Hines
patent: 2965899 (1960-12-01), Bohm et al.
patent: 3016531 (1962-01-01), Tomiyasu et al.
patent: 3916416 (1975-10-01), Lewis
patent: 4156243 (1979-05-01), Yorinks et al.
Silver, S., "Microwave Antenna Theory and Design," McGraw-Hill Book Co., 1949 pp. 388, 402-410, 459-464.

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