US 11,658,423 B2
Multibeam antenna comprising direct radiating array and reflector
Carolina Tienda Herrero, Stevenage (GB); and Simon Stirland, Stevenage (GB)
Assigned to Airbus Defence and Space Limited, Stevenage (GB)
Appl. No. 17/767,514
Filed by Airbus Defence and Space Limited, Stevenage (GB)
PCT Filed Oct. 8, 2020, PCT No. PCT/GB2020/052495
§ 371(c)(1), (2) Date Apr. 8, 2022,
PCT Pub. No. WO2021/069900, PCT Pub. Date Apr. 15, 2021.
Claims priority of application No. 19202251 (EP), filed on Oct. 9, 2019.
Prior Publication US 2022/0399652 A1, Dec. 15, 2022
Int. Cl. H01Q 15/14 (2006.01); H01Q 1/28 (2006.01); H01Q 3/46 (2006.01); H01Q 19/17 (2006.01)
CPC H01Q 15/147 (2013.01) [H01Q 1/288 (2013.01); H01Q 3/46 (2013.01); H01Q 15/148 (2013.01); H01Q 19/17 (2013.01)] 15 Claims
OG exemplary drawing
1. A multibeam antenna comprising:
a direct radiating array, DRA, comprising a plurality of radiating elements;
a reflector facing the DRA so as to reflect a field generated by the DRA; and
a DRA controller configured to control the plurality of radiating elements of the DRA according to a plurality of coefficients, such that the field generated at the DRA produces a plurality of beams when reflected by the reflector,
wherein the DRA controller is configured to determine the plurality of coefficients by using a bifocal antenna model to determine a field that would be produced by a subreflector and feed horn arrangement in an equivalent bifocal antenna configured to produce the plurality of beams, and determining the plurality of coefficients required to produce a similar incident field at the surface of the reflector.