US 11,936,108 B2
RCS reduction surface, RCS reduction member, and radar test system
Gerhard Hamberger, Munich (DE); Steffen Neidhardt, Munich (DE); Frank Gumbmann, Munich (DE); Maximilian Bogner, Munich (DE); Benedikt Simper, Munich (DE); and Matthias Beer, Munich (DE)
Assigned to Rohde & Schwarz GmbH & Co. KG, Munich (DE)
Filed by Rohde & Schwarz GmbH & Co. KG, Munich (DE)
Filed on Jun. 23, 2021, as Appl. No. 17/355,598.
Claims priority of application No. 20188691 (EP), filed on Jul. 30, 2020.
Prior Publication US 2022/0037797 A1, Feb. 3, 2022
Int. Cl. H01Q 17/00 (2006.01); G01S 7/40 (2006.01); H01Q 15/14 (2006.01)
CPC H01Q 17/007 (2013.01) [G01S 7/4004 (2013.01); H01Q 15/14 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An RCS reduction surface for reducing a radar cross section of an object, said RCS reduction surface comprising:
at least one absorber portion, said absorber portion being configured to absorb radar waves; and
at least one reflecting portion, said reflecting portion being configured to reflect radar waves,
wherein a first plane being associated with a top surface of said absorber portion and a second plane being associated with a top surface of said reflecting portion are spaced from each other by a predefined distance,
wherein said predefined distance is configured such that radar waves with a predefined wavelength range that are reflected at said absorber portion and at said reflecting portion interfere destructively with each other,
wherein a total area of the at least one absorber portion and a total area of the at least one reflecting portion have a predefined ratio, wherein said predefined ratio is dependent on an absorbance of said at least one absorber portion,
wherein said predefined ratio is configured such that an overall intensity of a radar wave that is reflected by said RCS reduction surface is minimized, and
wherein a summed intensity of radar waves reflected at the at least one absorber portion is approximately equal to a summed intensity of radar waves reflected at the at least one reflecting portion.