CPC H01Q 13/18 (2013.01) [H01Q 1/247 (2013.01); H01Q 1/38 (2013.01); H01Q 1/48 (2013.01); H01Q 1/528 (2013.01); H01Q 15/006 (2013.01); H01Q 21/065 (2013.01); H01Q 1/246 (2013.01)] | 10 Claims |
1. An antenna configured to receive global navigation satellite system (GNSS) signals, comprising:
a substrate having a front side and a backside opposite the front side;
a frontside patch arranged on the front side of the substrate, the frontside patch configured as a radiating element;
one or more impedance transformers, each of the one or more impedance transformers including a microstrip arranged on the front side of the substrate, each microstrip coupled to an antenna feed at an input and coupled to the frontside patch at an output; and
a metamaterial ground plane comprising:
a plurality of backside patches arranged on the backside of the substrate and separated from the frontside patch by the substrate, wherein the plurality of backside patches include a center backside patch surrounded in a radial direction by a plurality of intermediate backside patches, and an outer backside patch surrounding the plurality of intermediate backside patches, the center backside patch and the plurality of intermediate backside patches arranged in a pattern that provides circular symmetry with respect to a center of the antenna; and
a cavity coupled to the substrate, wherein each of the plurality of intermediate backside patches are electrically isolated from the cavity.
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