US 12,456,812 B1
Single arm spiral antennas
Thomas Patrick Cencich, Littleton, CO (US); and W. Neill Kefauver, Littleton, CO (US)
Assigned to Lockheed Martin Corporation, Bethesda, MD (US)
Filed by Lockheed Martin Corporation, Bethesda, MD (US)
Filed on Jan. 20, 2023, as Appl. No. 18/157,809.
Application 18/157,809 is a continuation of application No. 17/109,456, filed on Dec. 2, 2020, granted, now 11,670,860.
Int. Cl. H01Q 9/27 (2006.01); H01Q 1/14 (2006.01); H01Q 11/08 (2006.01)
CPC H01Q 9/27 (2013.01) [H01Q 1/14 (2013.01); H01Q 11/08 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An antenna, comprising:
a spiral antenna element having a single arm configured to couple to a radio frequency link at a central node;
a ground element comprising a conical frustum sharing an axis at the central node of the spiral antenna element and configured to couple to a ground reference for the radio frequency link; and
wherein the single arm of the spiral antenna element comprises a planar portion beginning at the central node and extending approximately to a width of the ground element, and a conic portion outside of the width of the ground element, the conic portion corresponding to a spiral shape projected onto a cone extending away from the planar section.