Communications: radio wave antennas – Antennas – Microstrip
Reexamination Certificate
2007-11-20
2007-11-20
Nguyen, Hoang V. (Department: 2821)
Communications: radio wave antennas
Antennas
Microstrip
C343S846000
Reexamination Certificate
active
11296569
ABSTRACT:
A method of suppressing grating lobes generated in a radiating pattern of a phased array antenna, and a patch antenna element for use in the phased array antenna are described. The phased array antenna is formed from a plurality of symmetrical patch antenna elements spaced apart at a predetermined distance from each other. Each patch antenna element is configured for producing an asymmetrical radiation pattern. The antenna element includes a conductive ground plane, a radiating patch backed by a cavity and arranged in cavity aperture, and a feed arrangement. The patch antenna element is configured such that a dimension of the radiating patch along the E-plane of the antenna element is less than the dimension of the cavity aperture by a first predetermined value selected to provide an asymmetrical radiation pattern of the patch antenna element. To provide a required degree of the asymmetry of said radiation pattern, a dimension of the radiating patch along the H-plane should be less than the dimension of the cavity aperture along said H-plane by a second predetermined value.
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Bauer Reuven
Iluz Zeev
Browdy and Neimark PLLC
Elta Systems Ltd.
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