US 12,288,919 B1
Broadband metamaterial termination for planar superconducting transmission line circuits
Edward J. Wollack, Clarksville, MD (US); Rahul Datta, Baltimore, MD (US); Karwan Rostem, Greenbelt, MD (US); and Kevin L. Denis, Crofton, MD (US)
Assigned to United States of America as represented by the Administrator of NASA, Washington, DC (US)
Filed by United States of America as represented by the Administrator of NASA, Washington, DC (US)
Filed on Sep. 11, 2023, as Appl. No. 18/244,720.
Int. Cl. H01P 1/24 (2006.01); H01P 3/00 (2006.01)
CPC H01P 1/24 (2013.01) [H01P 3/00 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A broadband matched termination for use in planar superconducting transmission line circuit structures, comprising:
a plurality of sub-wavelength alternating sections of normal-metal and superconducting transmission lines connected in series to form a meta-material absorber structure along a direction of propagation along a superconducting guiding structure;
wherein a width of each of said plurality of sub-wavelength alternating sections of normal metal and superconducting transmission lines are varied to effectuate an impedance taper.