US 12,456,808 B2
High isolation ring slot patch radiator for phased array antennas
Alec Adams, Seattle, WA (US); Peter Timothy Heisen, Kent, WA (US); and Mark Gregory Bedson, Federal Way, WA (US)
Assigned to The Boeing Company, Arlington, VA (US)
Filed by The Boeing Company, Arlington, VA (US)
Filed on Dec. 18, 2023, as Appl. No. 18/542,953.
Application 18/542,953 is a continuation in part of application No. 17/588,172, filed on Jan. 28, 2022, granted, now 12,255,407.
Claims priority of provisional application 63/251,582, filed on Oct. 1, 2021.
Prior Publication US 2024/0120654 A1, Apr. 11, 2024
Int. Cl. H01Q 7/00 (2006.01); H01Q 21/06 (2006.01)
CPC H01Q 7/00 (2013.01) [H01Q 21/064 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A unit cell antenna system for a periodic antenna array, the system comprising:
a top section to communicate a radio frequency (RF) signal, the top section including:
a dielectric layer, and
a ring patch, wherein the ring patch is supported by the dielectric layer, the ring patch having a center cutout hole to reduce a resonance frequency of the ring patch;
a bottom section to generate a desired radio frequency (RF) signal, the bottom section including:
a plurality of dielectric layers;
a ring slot supported by one of the plurality of dielectric layers;
an electrically conductive fence substantially surrounding the ring slot;
two electrical feed lines, wherein the electrical feed lines are 90-degrees out of phase; and
a foam layer disposed between the top section and the bottom section, the foam layer to separate the ring patch from the ring slot.