Patch antenna element and application thereof in a phased array antenna
First Claim
1. A patch antenna element comprising:
- a conductive ground plane having a cavity recessed therein and defining a cavity aperture, a radiating patch backed by the cavity and arranged in the cavity aperture, and a feed arrangement coupled to the radiating patch at a feed point located within the patch and operable to provide radio frequency energy thereto;
a plane perpendicular to the patch and passing through a center of the radiating patch and the feed point defining an E-plane of said patch antenna element, and a plane perpendicular to the E-plane and passing through the feeding point defining an H-plane of said patch antenna element;
the patch antenna element being configured such that a dimension of the radiating patch along the E-plane is less than the dimension of the cavity aperture by a first predetermined value selected to provide an asymmetrical radiation pattern of said patch antenna element.
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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.
19 Citations
21 Claims
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1. A patch antenna element comprising:
- a conductive ground plane having a cavity recessed therein and defining a cavity aperture, a radiating patch backed by the cavity and arranged in the cavity aperture, and a feed arrangement coupled to the radiating patch at a feed point located within the patch and operable to provide radio frequency energy thereto;
a plane perpendicular to the patch and passing through a center of the radiating patch and the feed point defining an E-plane of said patch antenna element, and a plane perpendicular to the E-plane and passing through the feeding point defining an H-plane of said patch antenna element;
the patch antenna element being configured such that a dimension of the radiating patch along the E-plane is less than the dimension of the cavity aperture by a first predetermined value selected to provide an asymmetrical radiation pattern of said patch antenna element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20, 21)
- a conductive ground plane having a cavity recessed therein and defining a cavity aperture, a radiating patch backed by the cavity and arranged in the cavity aperture, and a feed arrangement coupled to the radiating patch at a feed point located within the patch and operable to provide radio frequency energy thereto;
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19. A method of suppressing grating lobes generated in a radiating pattern of a phased array antenna, the method comprising forming the phased array antenna from a plurality of symmetrical antenna elements spaced apart at a predetermined distance from each other, each producing an asymmetrical radiation pattern, the method thereby enabling to extend a scanning angle of a steered energy beam of said phased array antenna.
Specification