Loop Antennas With Ferromagnetic Core TRIZ Cases

Segmented nanocrystalline islands separated by dielectric-filled gaps suppress eddy current losses while maintaining magnetic field integrity for NFC devices.

A ferrite composition with specific oxide ratios concentrates magnetic flux to extend wireless communication range.

A bulk acoustic wave multiferroic antenna translates electromagnetic resonance into acoustic strain across piezoelectric and magnetostrictive layers.

Controlled surface roughness prevents sticking during sintering without releasing powder contamination, maintaining frequency stability near metal components.

Insulating regions on a rear conductor facing the winding axis prevent eddy currents from metal plates, enabling downsized antennas inside box-shaped cases.

A multilayer coil antenna device uses via-hole conductors to shape magnetic flux distribution within a stacked core structure.

A mandrel-wound magnetic antenna uses a concentrically wound core to induce a magnetic current loop.

Pulsed DC magnetic fields penetrate soil and water to overcome signal attenuation limits in deep mine shafts.

Spiral antenna pattern connects to conductor wires through insulating layer cuts for reliable electrical contact.

Segmented RF antennas bridge sterile and non-sterile zones, enabling device programming without compromising the surgical field.

A loop coil NFC antenna module uses a hybrid magnetic shielding sheet to absorb electromagnetic interference.

Stacking coils with magnetic shielding reduces interference, maintaining performance while minimizing terminal size.

A ferrite-loaded half-loop antenna achieves wideband operation with minimal height.