US 11,967,764 B1
Single antenna with dual circular polarizations and quad feeds for millimeter wave applications
Edwin Lim, Cupertino, CA (US); and Marvin Weinstein, Mountain View, CA (US)
Assigned to Waymo LLC, Mountain View, CA (US)
Filed by Waymo LLC, Mountain View, CA (US)
Filed on Oct. 22, 2021, as Appl. No. 17/508,757.
Int. Cl. H01Q 1/50 (2006.01); H01P 3/12 (2006.01); H01P 3/16 (2006.01); H01Q 21/00 (2006.01); H01Q 21/24 (2006.01)
CPC H01Q 21/0006 (2013.01) [H01P 3/121 (2013.01); H01P 3/16 (2013.01); H01Q 1/50 (2013.01); H01Q 21/24 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a dielectric substrate;
a first metallic layer, wherein a bottom surface of the first metallic layer is coupled to a top surface of the dielectric substrate;
a through-hole, wherein the through-hole extends through the dielectric substrate and the first metallic layer;
a dielectric layer, wherein a bottom surface of the dielectric layer is coupled to a top surface of the first metallic layer;
a second metallic layer coupled to a top surface of the dielectric layer, wherein the second metallic layer comprises:
a non-conductive opening,
a plurality of feeds, wherein a first end of each feed is located in the non-conductive opening and a second end of each feed is a single-ended termination, and
an impedance transformer;
a third metallic layer coupled to a bottom surface of the dielectric substrate; and
a set of metallic via-holes positioned proximate the non-conductive opening in the second metallic layer, wherein the set of metallic via-holes electrically couple the second metallic layer to the third metallic layer.