magnetoresonators

A magnetoresonator is a type of resonant circuit that exhibits a frequency shift in response to an applied magnetic field. This phenomenon is based on the properties of ferromagnetic materials, which change their magnetic permeability with the presence of an external magnetic field. When incorporated into an LC resonant circuit, where L is inductance and C is capacitance, the magnetic field's influence on the inductance causes a change in the circuit's resonant frequency.

The core principle relies on the fact that the magnetic permeability of a ferromagnetic material is not constant but is a function of the applied magnetic field strength. In a magnetoresonator, the inductor coil is often wound around a core made of such a material. As the external magnetic field is varied, the permeability of the core changes, altering the inductance of the coil. This change in inductance directly impacts the resonant frequency of the LC circuit, which is inversely proportional to the square root of the product of inductance and capacitance.

Magnetoresonators find applications in magnetic field sensing, particularly for measuring static or slowly varying magnetic fields. Their ability to translate a magnetic field into a measurable frequency change makes them useful in various sensor designs. They can be used in non-contact position sensing, proximity detection, and as components in magnetic anomaly detection systems. The sensitivity and range of a magnetoresonator can be tuned by selecting appropriate ferromagnetic materials and designing the resonant circuit parameters.