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US 12,366,618 B2Granted
System for an acoustically driven ferromagnetic resonance sensor device
AssigneeSonera Oy
InventorsDominic Labanowski, Sayeef Salahuddin
Life of this patent
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Abstract
A system for an acoustically driven ferromagnetic resonance (ADFMR) based sensor. The system may include a power source, that provides an electrical signal to power the system, at least one circuit comprising a set of ADFMR circuits, sensitive to external electromagnetic fields, a power splitter, a power combiner and a detector circuit. The system functions to detect and measure external electromagnetic (EM) fields by measuring a perturbation of the electrical signal through the ADFMR circuits due to the EM fields.
Claims18
A system for an acoustically driven ferromagnetic resonance (ADFMR) based sensor includes:
- a power source, comprising an electronic oscillator that provides an electrical signal;
- an at least one circuit coupled to the power source to receive the electrical signal, the at least one circuit comprising a set of ADFMR circuits comprising:
- a first ADFMR circuit, wherein the first ADFMR circuit comprises a first ADFMR device, wherein the first ADFMR circuit enables perturbation of the electrical signal by electromagnetic (EM) fields external to the system;
- a second ADFMR circuit connected in parallel to the first ADFMR circuit;
- and
- a power splitter upstream from the first and second ADFMR circuits and configured to split the electrical signal into a first test signal that travels through the first ADFMR circuit and a second test signal that travels through the second ADFMR circuit;
- a power combiner downstream of the first and second ADFMR circuits and configured to combine an output of the first ADFMR circuit and the second ADFMR circuit;
- and
- a detector circuit, that determines the EM field from the electrical signal perturbation.
6 more elements
Dependencies are inferred from the claim text.