Near-Field Systems Using Receivers TRIZ Cases

Coiled transducer leads and conductive shielding preserve electrical length, reduce parasitics, and limit body-field interference in NULEF systems.

Surface-wave near-field coupling keeps the DUT connected during mmWave OTA rotation tests, separating call control from beam measurement.

NFC tags link welding components, operator credentials, and calibration data to improve setup accuracy, secure access, and reliable parameter input.

Automatic LC tank feedback tuning matches antenna resonance to carrier frequency faster, cutting power use and interference.

Continuous LC feedback locks NFMI antenna resonance to the carrier, cutting tuning time, power use, and interference in wireless earbuds.

An analog FSK demodulation circuit converts frequency shifts to binary signals without high-frequency clocks, cutting power use and circuit size.

Phase-controlled transistor and diode clamping limits resonant circuit voltage in RFID transponders to prevent IC damage and data loss.

Instead of a fixed button reset, the approach selects RF, NFC, audio, light, motion, or location checks for each ownership level.

A trainable RF transceiver relays commands via the internet to bypass range limits, while rolling code authentication prevents replay attacks.

Periodic near field directors use metallic strips to guide millimeter-wave signals, reducing channel loss by 20 dB across air gaps.

Modulating current on existing power lines transmits configuration data, eliminating separate channels and reducing device complexity.

A digital signal processor processes wireless serial commands in a near-field module, bypassing voice data priority delays.

A rectifier circuit switches to diode mode during FSK communication to prevent waveform distortion.

An NFC control circuit dynamically tunes and matches NFC antennas using capacitance sensing to maintain optimal signal range while reducing power loss.

Confirmation pulse signals distinguish genuine NFC presence from antenna re-tuning, reducing false polling and battery drain.

Dynamic NFC parameter negotiation adjusts communication duration and power levels to eliminate unnecessary battery depletion and interference.

A communication apparatus uses a display unit to enforce non-display instructions that block data exchange via electric field coupling.

A wireless IC device uses a metal article as an electromagnetic radiator for RFID signal transmission.

A series capacitor blocks high transmit voltages from the amplifier while maintaining resonance frequency stability during mode switching.

Coupling coil extends through card recess to maintain electromagnetic connection while reducing wiring disconnection risk during bending.

A first device detects a second device position using Bluetooth signal receiving angles calculated from phase differences between multiple antennas.

A non-contact communication device operates as an active side by receiving and sending commands using a carrier wave from a reader.