Asymmetric-element reflect array antenna
AssigneeRaytheon Company
InventorDaniel T. McGrath
Life of this patent
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Abstract
A reflect array antenna comprises a non-electrically conductive substrate with an array of antenna elements supported on the substrate. Each antenna element comprises a plurality of patch radiating elements arranged in rows and columns. Each patch radiating element comprises a plurality of notches formed in the element, the notches being angularly displaced around the circumference of the element. A plurality of stub short transmission lines are individually positioned in each of the plurality of notches and a plurality of switches individually couple one end of a notch to one of the plurality of stub short transmission lines.
Claims27
A patch antenna element, comprising:
- a non-electrically conducting substrate;
- a patch antenna element;
- a plurality of notches formed in the antenna element an angularly displaced around the circumference of the patch antenna element;
- a plurality of stub short transmission lines, each stub positioned in one of the plurality of notches;
- and
- a plurality of switches individually coupled to an end of one notch and to one of the plurality of stub short transmission lines.
A reflect array antenna, comprising:
- a non-electrically conductive substrate;
- an antenna array supported on the substrate, each antenna of the array comprising:
- a patch antenna element;
- a plurality of notches formed in the patch antenna element and angularly displaced around a circumference of the patch antenna element;
- a plurality of stub short transmission line, each stub positioned in one of the plurality of notches;
- and
- a plurality of switches individually coupled to an end of one notch and to one of the plurality of stub short transmission lines.
A circularly polarized reflect array antenna, comprising:
- a support substrate;
- a plurality of subarrays supported on the support substrate, each subarray comprising a plurality of antenna elements, each antenna element comprising:
- a patch antenna element;
- a plurality of notches formed in the patch antenna element and angularly displaced around a circumference of the patch antenna element;
- a plurality of stub short transmission lines, each stub positioned in one of the plurality of notches;
- and
- a plurality of switches individually coupled to an end of one notch and to one of the plurality of stub short transmission lines.
A circularly polarized reflect array antenna, comprising:
- a plurality of subarrays supported on a support base, each subarray comprising a plurality of antenna elements, each antenna element comprising:
- a patch antenna element;
- a plurality of notches formed in the patch antenna element and angularly displaced around a circumference of the patch antenna element;
- a plurality of stub short transmission lines each stub positioned in one of the plurality of notches;
- a plurality of switches individually coupled to an end of one notch and to one of the plurality of stub short transmission lines;
- a feed horn coupled to the support base for transmitting or receiving radio frequency energy;
- and
- a subreflector supported on the support base for focusing radio frequency energy from the feed horn to the plurality of subarrays.
Dependencies are inferred from the claim text.