Loop Antennas With Ferromagnetic Core TRIZ Cases

A non-overlapping magnet and coil layout preserves coil RF performance while avoiding added device width in compact electronics.

Lateral bridge sub-cores stabilize magnetic coupling between segmented core parts, reducing sensitivity to temperature and contact pressure.

A third PCB links printed antennas into a closed mutual-induction circuit, expanding MST recognition area without needing more mounting space.

A side-wrapping NFC antenna extends from the back to the edges, enabling front and rear card swiping while avoiding screen and battery interference.

A heat-conductive path from the top cover to a metallic case dissipates fast-charging heat while keeping the charger sealed against water and dust.

A separate antenna senses second-frequency impedance and phase changes to distinguish human bodies from metal during wireless charging.

A deformable helical wire antenna expands to fit objects, then contracts to grip them for more robust RFID tagging and theft detection.

A two-coil series layout across foldable housings extends short-range antenna operation and keeps wireless performance stable in folded states.

External high-permeability antennas concentrate magnetic flux to boost catheter position sensor signals without increasing diameter.

A resonant passive stylus and conductive blocking member cut eddy-current noise, improving touch sensitivity near conductive objects.

Ferrite-coupled helical antenna layers extend RFID and biochip read range while reducing energy loss and improving data transmission.

A segmented loop antenna with coupling feed and integrated heat dissipation supports broad LTE and 5G bands in tight vehicle mounting space.

Switchable series inductor coils tune one compact antenna across Qi, Rezence, and PMA bands while improving transfer efficiency and alignment tolerance.

Alternating current paths across stacked antenna layers boost flux linkage, widening NFC coverage and stabilizing coupling to misaligned cylindrical receivers.

Ferrite loading improves half-loop antenna impedance matching and SNR in metal grain bins, enabling more accurate EM moisture imaging.

Rotating a central core and inductor coils inside a plasma field enables long-distance signal transmission with improved energy efficiency and data security.

High-permeability antennas placed outside sensor coils boost magnetic flux and signal strength in small-diameter catheter position sensors.

A resonant stylus circuit shifts frequency and uses ferrite-coil coupling to keep touch detection precise near noise and conductive objects.

Angled gaps between ferrite sheet pieces let the strip roll and wrap easily while limiting resonance shifts and communication range loss.

Segmented ferrite cores, hybrid conductors, and varactor tuning shrink HF antennas while adding multi-band coverage and fast beam steering.

Thermoelectric chips conduct charging heat from the top cover to a metallic case while the sealed structure blocks water and dust ingress.

A lens-area antenna combines NFC and inductive charging in eyewear, cutting bulk and preserving function even when folded.

Segmented shielding below and beside coil antennas blocks stray magnetic fields while preserving battery space and wireless charging efficiency.

A nested transmitter-receiver coil layout improves NFC charging efficiency and enables 360-degree power transfer without precise alignment.

A three-coil NFC layout isolates unwanted high-frequency components while maintaining impedance and avoiding extra chip inductors.

Frequency-separated resonant stylus sensing on touch electrodes cuts noise, avoids extra EMR sensors, and works near conductive objects.

A horizontal ferrite EAS antenna hidden in a shroud extends tag detection from floor to shoulder height without blocking checkout access.

A heat dissipation member doubles as an antenna substrate, fitting dual-band antennas into tight electronics while managing grounding and interference.

Multiple loop antennas compare signal phase and amplitude in the frequency domain to provide backup aircraft bearing estimates when GPS is unavailable.

A coil split across both substrate surfaces raises inductance and antenna characteristics without increasing the coil mounting area.

Axially sandwiched magnetic bodies with cutouts guide more flux through the antenna coil while reducing bypass paths and eddy currents.

Multiple antenna loops and synchronized driving reduce stylus noise interference while improving touch accuracy, sensitivity, and power use.

A ferrite-core resonant stylus tip boosts signal strength and filters noise for accurate touch detection near conductive objects.

Offsetting the magnetic core from directly below the coil opens the flux path and strengthens coupling with circuit-board current loops.

A deformable helical antenna grips objects after expansion and recovery, improving RFID attachment, tracking, and movement detection.

Variable-width circuit board sections distribute bending stress to protect antenna wiring and maintain reliable high-frequency connections.

Closed-loop coil control keeps the magnetic field uniform across a rubidium gas cell, enabling compact VLF reception with lower noise.

Ferrite shielding and coil selection reduce magnetic interference, cut energy loss, and improve multi-standard wireless power transfer.

A stacked patch-coil antenna with dielectric separation and localized magnetic material cuts interference and saves mounting space for UWB, NFC, and charging.

A continuous ferrite sintered plate on an elongate base avoids gaps and overlap, preserving magnetic properties and handling in antenna cables.

Inclined bobbin surfaces disperse case impact before it reaches the antenna core, reducing breakage risk and improving reliability.

Perpendicular magnet fields around the coil antenna reduce shielding-sheet interference, helping wireless charging stay stable with less heat.

Horizontal mmWave antenna alignment with front and rear cameras saves internal space, preserves signal quality, and supports thinner builds.

Spherical filler particles in a resin layer help the coil pattern conform to the magnetic body, preventing voids while improving adhesion and thickness.

Two perpendicular inductive elements with a 90° phase shift generate robust positioning signals for accurate relative position and orientation detection.

Separate ground planes and a decoupling element isolate antenna noise, improving telecoil sensitivity in hearing aid communication.

A loop coil linked to millimeter-wave antenna units cuts module footprint in display panels while preserving optical and touch performance.

Magnetic attachment lets vehicle antenna arrays add or reposition antennas quickly for flexible, accurate network and spectrum monitoring.

Side metal shields redirect coil antenna fields, cutting shielding-layer area to save battery space and support better wireless charging.

Multiple coils with different inductances let one HDD transmitter cover 0.3-50 KHz, improving locating accuracy in deep and noisy drilling.

A meander antenna with magnetic sheets on both sides simplifies solenoid-style assembly and lowers cost while supporting wireless communication.

Ferrite arc core sections cut eddy current loss in a sonde while enabling multi-frequency magnetic signals for more flexible utility locating.

A modular phased array antenna integrates a band stop frequency selective surface between the radiator and patterned ferrite layer.

Multilayer antenna devices with orthogonal coil conductors minimize unwanted harmonic radiation caused by magnetic-field coupling between integrated components.

A combined antenna assembly integrates Bluetooth and NFC functions within a ring-shaped wearable device structure.