Loop Antennas With Ferromagnetic Core TRIZ Cases

A toroidal core transformer supplies low voltage and high current to a magnetic transmit antenna, eliminating resonance hazards.

Conductive members spaced less than a wavelength from the ground plane form loops that reduce Specific Absorption Rate and improve efficiency.

An antenna device adaptor connects to a magnetic core base, enabling flexible integration with various printed circuit board layouts.

Segmented conductive gaps in the shield prevent eddy currents that generate opposing fields, preserving sensitivity to deep body properties.

An injection-moulded polymer core embeds magnetic charges and connecting interfaces to eliminate separate bobbins, reducing structural complexity.

Flexible substrate wiring patterns form a solenoid antenna coil, extending communication distance while minimizing metal shield interference.

A circuit switch unit reconfigures a shared antenna between serial and parallel resonance modes to support both reader/writer and card functions.

An integrated antenna device combines a magnetic core for low frequency operation with a metallized high frequency coil on a replaceable cap.

A laminated coil unit with a magnetic body isolates power and communication windings to minimize electromagnetic interference.

Segmented plate cores in a magnetic coupling antenna generate opposing fields, resolving the trade-off between structural simplicity and communication distance.

An RFID antenna structure uses electrical and magnetic compensation elements to stabilize impedance matching across varying positions.

Silicone-filled glass bead RFID carrier resists 40,000 PSI pressure and 210°C heat while maintaining signal readability.

Parabolic antenna windings boost magnetic permeability to resolve low sensitivity in thin laminated beds.

Welding conductive terminals eliminates adhesive outgassing during high-temperature sterilization.

A perforated magnetic backing plate behind a transmitter coil increases inductance by 39% while reducing weight by 50%.

A near-field electromagnetic induction antenna uses a ferrite shield to amplify magnetic flux and electric field strength.

Vertical stacking separates conductive patterns to prevent overlap and parasitic resonance in narrow width electronic devices.

Ferrite flux guides and shields direct magnetic fields away from metallic interference, enabling efficient wireless power transfer in thin portable devices.

An autotransformer antenna prevents dielectric breakdown between coils while enhancing magnetic coupling efficiency for reliable HF and UHF communication.

Positioners on the antenna terminal prevent capacitor deviation when solder paste liquefies, ensuring accurate placement.

A rotating diamagnetic magnet generates oscillating magnetic fields through mechanical rotation and magnetic levitation.

Shielded antenna redirects magnetic flux to concentrate energy in the charging zone, reducing harmful electromagnetic radiation outside the device.

Segmenting the antenna coil along a magnetic sheet edge utilizes shielding effects to maintain performance while reducing device casing size.

A ferrite sheet antenna uses via holes and metal layers to integrate the absorber directly into the substrate.

An asymmetric magnetic core layout resolves the trade-off between coil loss and turn count in compact RFID antennas.

Conductive patch elements measure E-field amplitudes to correct position data errors from near-field coupling interference.

Segmenting the ferrite core with non-parallel windings resolves the trade-off between transmission power and DC resistance in compact antennas.

A magnetic sheet mediates flux between the coil and shield plate, resolving low conductivity issues from transparent materials.