How can the common-mode inductance of IoT sensors achieve ultra-low power consumption design?

Magnetic core material selection: Ferrite with high initial permeability (μi≥2000) (such as TDK PC50) is adopted to reduce the excitation current in the low-frequency band (below 10kHz).

Winding optimization: Multi-strand twisted wire: 0.05mm×32-strand Litz wire is used to reduce skin effect losses above 10MHz, and the AC resistance is reduced by 40%.

Self-resonant frequency enhancement: By adjusting the winding spacing, the self-resonant frequency (SRF) is increased to above 500MHz, avoiding resonance in the sensor's operating frequency band (such as 2.4GHz).

Dynamic power consumption management: During non-communication periods, it switches to a low-power mode, disconnecting the inductive winding through an external control signal to further reduce static power consumption.