US 12,107,330 B2
Apparatus and methods for circularly polarized antenna arrays
Ahmed Sakr, Cairo (EG); and Islam A. Eshrah, Giza (EG)
Assigned to Analog Devices International Unlimited Company, Limerick (IE)
Filed by Analog Devices International Unlimited Company, Limerick (IE)
Filed on Feb. 14, 2023, as Appl. No. 18/168,868.
Prior Publication US 2024/0275058 A1, Aug. 15, 2024
Int. Cl. H01Q 13/02 (2006.01); H01Q 1/50 (2006.01); H01Q 15/24 (2006.01)
CPC H01Q 13/0241 (2013.01) [H01Q 1/50 (2013.01); H01Q 15/24 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A circuit board comprising:
a plurality of metal layers separated by dielectric;
a first patch antenna formed in a first metal layer of the plurality of metal layers, the first patch antenna including a first pair of signal feeds;
a first delay line formed in the first metal layer and connecting the first pair of signal feeds to a first excitation via;
a second patch antenna formed in a second metal layer of the plurality of metal layers, the second patch antenna including a second pair of signal feeds, wherein the first patch antenna and the second patch antenna are stacked; and
a second delay line formed in the second metal layer and connecting the second pair of signal feeds to a second excitation via.