US 12,392,711 B2
Absortion sheet for absorbing power from an electromagnetic wave, system for performing a radiation characterization, method for measuring an electromagnetic radiative near field using the same
Daniel Sjöberg, Malmö (SE); Mats Gustafsson, Malmö (SE); and Johan Lundgren, Lund (SE)
Assigned to MXWaves AB, Lund (SE)
Appl. No. 18/247,918
Filed by MXWaves AB, Lund (SE)
PCT Filed Oct. 7, 2021, PCT No. PCT/EP2021/077704
§ 371(c)(1), (2) Date Apr. 5, 2023,
PCT Pub. No. WO2022/074125, PCT Pub. Date Apr. 14, 2022.
Claims priority of application No. 2051181-2 (SE), filed on Oct. 9, 2020.
Prior Publication US 2024/0011893 A1, Jan. 11, 2024
Int. Cl. G01N 21/17 (2006.01); G01R 29/08 (2006.01); H01Q 17/00 (2006.01)
CPC G01N 21/171 (2013.01) [G01R 29/0885 (2013.01); H01Q 17/007 (2013.01); G01N 2021/1714 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An absorption sheet for absorbing power from an electromagnetic wave generated by a device under test, the absorption sheet comprising:
a substrate having a thermal conductivity k lower than 1 W/m/K and a electrical conductivity σ lower than 10−4 S/m;
an array of absorption elements configured to absorb electromagnetic energy from the electromagnetic wave, the array of absorption elements embedded in or arranged on the substrate, each absorption element comprising:
a conductive portion made of an electrically conductive material, wherein the conductive portion is adapted to receive the electromagnetic wave; and
a resistive portion embedded in the conductive portion, the resistive portion adapted to absorb heat from a current generated by the electromagnetic wave in the conductive portion,
wherein the conductive portion comprises a first element part and a second element part, wherein the first element part and the second element part are separated by the resistive portion, and
wherein each absorption element has an elongate and planar body.