US 11,788,910 B2
Rotational and linear parameter measurements using a quadrature continuous wave radar with millimeter wave metamaterials and frequency multiplexing in metamaterial-based sensors
Alexander Schossmann, Graz (AT); Alexander Bergmann, Graz (AT); Dirk Hammerschmidt, Finkenstein (AT); and Christof Michenthaler, Feistritz/Gail (AT)
Assigned to Infineon Technologies AG, Neubiberg (DE)
Filed by Infineon Technologies AG, Neubiberg (DE)
Filed on Nov. 4, 2021, as Appl. No. 17/518,912.
Prior Publication US 2023/0140391 A1, May 4, 2023
Int. Cl. G01L 5/22 (2006.01); G01D 5/14 (2006.01); B62D 6/10 (2006.01); H04W 4/38 (2018.01)
CPC G01L 5/221 (2013.01) [B62D 6/10 (2013.01); G01D 5/145 (2013.01); H04W 4/38 (2018.02)] 24 Claims
OG exemplary drawing
 
1. A sensor system, comprising:
a first metamaterial track mechanically coupled to a rotational shaft configured to rotate about a rotational axis, wherein the first metamaterial track is arranged at least partially around the rotational axis, and wherein the first metamaterial track comprises a first array of elementary structures;
at least one transmitter configured to transmit a first continuous wave towards the first metamaterial track, wherein the first metamaterial track is configured to convert the first continuous wave into a first receive signal based on a rotational parameter of the rotational shaft; and
at least one quadrature continuous-wave receiver configured to receive the first receive signal, acquire a first measurement of a first property of the first receive signal, and determine a measurement value for the rotational parameter of the rotational shaft based on the first measurement.