System and method for preferentially controlling grating...

Details System and method for preferentially controlling grating... System and method for preferentially controlling grating...

2006-12-19

2006-12-19

Le, Hoanganh (Department: 2821)

Communications: radio wave antennas

Antennas

Slot type

C343S786000, C310S334000

Reexamination Certificate

active

07151498

ABSTRACT:
A DRA with preferentially controlled grading lobes is described. The DRA comprises a plurality of elements, collectively defining a main lobe nearest the DRA boresight and a set of grating lobes near the main lobe, wherein each of the grating lobes in the set of grating lobes is angularly displaced from the main lobe by a grating lobe angle that varies asymmetrically about that main lobe. In one embodiment, the plurality of elements comprises a first row of elements extending in a first direction that is tilted relative to the Northerly direction by an angle ψ, and a second row of elements, parallel to the first row of elements, the second row of elements offset from the first row of elements in the first direction by a stagger distance S.

REFERENCES:
patent: 2751586 (1956-06-01), Riblet
patent: 2908002 (1959-10-01), Van Atta
patent: 4757324 (1988-07-01), Dhanjal
patent: 5404148 (1995-04-01), Zwarts
patent: 6137450 (2000-10-01), Bhattacharyya et al.
patent: 6384516 (2002-05-01), Fraser
patent: 2005/0088356 (2005-04-01), Lenormand

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