High Q RFID Coil for Access Control System and Wireless Charging

RFID antenna coils for RFID system and smart IC card application

This RFID antenna coil is designed for RFID systems and smart IC card applications. Inductance is 734µH±2% , operating frequency is 125kHz , Q factor is ≥120 , and self-resonant frequency is ≥1.7MHz. The product uses a honeycomb multi-layer winding process with Litz wire , offering high Q factor and a wide inductance range. Multiple structure types are supported, including RFID antennas for access control systems, RFID cylindrical coils, smart IC card coils, and wireless charging coils. Wire diameter is available from 0.04mm to 1.3mm. Rated current is up to 50A. Operating temperature range is -55°C to +155°C. It is widely used in RFID access control systems, smart IC cards, wireless charging, industrial sensing, and automotive electronics.

FEATURES

• The smallest emitter antenna coil
• Various RFID coils structure meet customer specifications:
• High Q value and wide inductance range
• Honeycomb type winding with silk copper wire
• Customized to customer specifications
• Rated current up to 50A
• Operating temperature: -55 to +155 °C
• Wire diameter 0.04mm to 1.3mm
• RFID coils for access control system RFID antenna
• RFID cylinder coils
• RFID coils for smart IC card
• Wireless charging coils
• Custom-made are welcome

Applications

• RFID access control systems
• Smart IC cards
• Wireless charging receivers
• Automotive passive keyless entry systems
• Industrial asset tracking tags
• NFC near-field communication devices
• Medical IoT sensors
• Animal electronic tags

Electrical specification:

• L: 734uH±2% @125KHz,1V
• DCR: 2.8Ω±10%
• Q: 120 Min@125KHz,1V
• SRF: 1.7MHz Min
• Operating temperature: -40℃ to +125℃
• Storage temperature: -40℃ to +85℃

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FAQ

Q: What are the advantages of honeycomb winding compared to ordinary winding?

A: Honeycomb winding uses multi-layer staggered winding to effectively reduce distributed capacitance. This increases the self-resonant frequency (SRF), allowing the coil to maintain stable inductance and Q factor at the operating frequency. The honeycomb structure also enhances mechanical strength and provides better vibration resistance.

Q: What is the function of Litz wire?

A: Litz wire is made of multiple insulated thin copper strands twisted together. It effectively reduces skin effect and proximity effect losses at high frequencies, improving the coil's Q factor and signal reception sensitivity. It is a key material choice for enhancing RFID antenna performance.

Q: How long is the delivery time and what packaging methods are used?

A: The standard lead time is 2-8 weeks after order confirmation, depending on product specifications and order quantity. Products are securely packed with cartons, foam, pallets, wrapping film, and fixing straps to ensure safe international transportation.