US 12,000,718 B2
Position sensor and position encoder using millimeter-wave metamaterial with a millimeter-wave radar
Alexander Schossmann, Graz (AT); Alexander Bergmann, Graz (AT); Dirk Hammerschmidt, Finkenstein (AT); and Christof Michenthaler, Arnoldstein (AT)
Assigned to Infineon Technologies AG, Neubiberg (DE)
Filed by Infineon Technologies AG, Neubiberg (DE)
Filed on Jun. 28, 2021, as Appl. No. 17/360,079.
Prior Publication US 2022/0412779 A1, Dec. 29, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G01D 5/48 (2006.01); G01P 3/00 (2006.01)
CPC G01D 5/48 (2013.01) [G01P 3/00 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A rotation sensor system, comprising:
a rotatable target object configured to rotate about a rotational axis in a rotation direction;
a first millimeter-wave (mm-wave) metamaterial track coupled to the rotatable target object, wherein the first mm-wave metamaterial track is arranged around the rotational axis, and wherein the first mm-wave metamaterial track comprises a first array of Fano resonance elementary structures having at least one first characteristic that changes around a perimeter of the first mm-wave metamaterial track;
a first transmitter configured to transmit a first electro-magnetic transmit signal towards the first mm-wave metamaterial track, wherein the first mm-wave metamaterial track converts the first electro-magnetic transmit signal into a first electro-magnetic receive signal;
at least one receiver configured to receive the first electro-magnetic receive signal; and
at least one processor configured to determine a rotational parameter of the rotatable target object based on the first electro-magnetic receive signal.