Breakthroughs in NFC antenna technology for mobile payment

 

13.56 MHzSmall-sized Magnetic AntennaThe launch is catching up with the NFC heat wave.

I don't understand why there are two standards in China: 2.4g and 13.56mhz. the backend protocols are easy to unify. Isn't it because of the differences in antennas?

13.56mhz is indeed a headache, and the traditional design volume is unacceptable: ApproachingBusiness card sizeAnd also consider pastingMAGNETIC FILM. Prevents the reader from sendingSignal received metal reflection from the mobile phone antenna.

13.56mhz wavelength at 22.1 meters, The best antenna around at least 5 meters to obtain the best induction signal, using magnetic materials to reduce the volume, Japanese TDK, South Korea and other companies launched a series of magnetic materials. However, it is expensive and prone to fragmentation. The mobile phone has limited space and difficult structural design.

The materials of the organic system we use overcome this drawback. The winding 13.56mhz antenna is small in size and is inserted to the phone housing gap by referring to the FM built-in antenna installation method:

 

The flexible transfer part is designed with the introduction of the phone signal.

In short, the release of the 13.56mhz small-size antenna will greatly promote the popularization of NFC.

Terminal antenna QQ group: 152117941 by QQ: 630142418

 

The payment method for NFC is implemented through the 13.56 MHz RFID Radio Frequency Identification System. The RFID Smart tag of the application is attached to the back shell of the mobile phone, which can save space to the maximum extent. In mobile phones and other hand-held electronic devices, electronic tags must be integrated or attached to electronic devices. as a component of a device, electronic tags often have limited space, inevitably, RFID tags (usually passive) should be attached to the surface of conductive objects such as metal or to places with metal devices nearby. In this way, the tag is triggered by the signal sent by the card reader.Alternating Electromagnetic FieldVery vulnerableEddy Current Attenuation of metalThe signal strength is greatly reduced, leading to a failure in the reading process. Therefore, in order for the product to better use card reading, you need to addAbsorbing Materials. Ferrite Films have been widely used in small payment mobile phones and RF fields.

Mainly used in:

1. Mobile phone with NFC function.

2. contactless IC card

3. RFID Reader/Write

4. RFID tag (13.56 MHz)

RFID/NFC anti-metal material is a typeMainly absorbing electromagnetic wavesFunction composite material, which can eliminate the back and forth reflection of electromagnetic waves in the shielding cavity, so as to reduce the clutter and eliminate or reduce the interference of the clutter on the equipment, it also effectively prevents interference and damage to the surrounding equipment and personnel. Therefore, it is an advanced method to eliminate electromagnetic wave pollution.

common thickness: 0.08mm 0.1mm 0.2mm 0.3mm.
the wireless charger is changed from a V power supply to a sympathetic electromagnetic field , and then the sympathetic electromagnetic field generates a sympathetic electromagnetic field, and the sympathetic electromagnetic field changes to a current charging; when a sympathetic electromagnetic field encounters a metal, it will produce electronic eddy current, which will affect the skin of the metal and generate heat energy on the metal, reducing the charging efficiency and wasting energy. Interference with the main board of the line affects the normal operation of the entire charger. Using RFID/NFC metal-resistant materials, through high magnetic flux, providing a loop to the sympathetic magnetic field can improve efficiency.
mainly used:
1. noise Suppression of NFC payment system and RFID System
2. internal Electromagnetic Interference and reduced resonance (installed in the shielding box)
3. RF block, amplifier
4. radiation noise reduction (circuit, integrated circuit, flat cable)
5. surface Current Suppression, improved noise immunity, and reduced mobile phone SAR
6. improved antenna receiving sensitivity.
7. Electromagnetic Noise Reduction of electronic devices (especially mobile devices)