Absorbing material, Shielding material, Electromagnetic shielding, Magnetic sheet, ferrite sheet.
News Center
Your present position:Home-News Center-RFID anti-metal interference solution-magnetic barrier Back >

RFID anti-metal interference solution-magnetic barrier

Author:admin   AddTime:2021-07-12

RFID anti-metal interference solution-the role of the magnetic barrier in RFID The receiving range of the reader is affected by many factors, such as the frequency of radio waves, the size and shape of the tag, the energy of the reader, the interference of metal objects, and other radio frequency devices Wait. In general, the effective receiving distance of low-frequency passive tags is within one foot, the receiving distance of high-frequency passive tags is about three feet, and the receiving distance of UHF tags is ten to twenty feet.

The origin of RFID anti-metal interference: For semi-active and active tags that use batteries, the reader can receive signals from three hundred feet or more. For low-frequency and high-frequency radio frequencies, if the size of the tag and the reader antenna are the same, the receiving distance can be calculated by multiplying the antenna diameter by 1.4. This rule is applicable when the diameter is less than 30 cm. The magnetic permeability of the absorbing material is higher than that of the metal, which can change the magnetic field environment of the RFID antenna and provide a long read and write distance. Like the radio we listen to, the radio frequency tag and the reader must be modulated to the same frequency to work. LF, HF, and UHF correspond to radio frequencies of different frequencies. LF stands for low frequency radio frequency, around 125KHz, HF stands for high frequency radio frequency, around 13.56MHz, UHF stands for ultra-high frequency radio frequency, in the range of 850 to 910MHz. There are 4 kinds of frequency bands in operation, low frequency (125KHz), high frequency (13.54MHz), ultra high frequency (850-910MFz), microwave (2.45GHz). Each frequency has its characteristics and is used in Different fields, so to use it correctly, you must first select the appropriate frequency. Different frequencies have different characteristics, so their uses are varied. For example, low-frequency tags are cheaper than UHF tags, save energy, and have a strong ability to penetrate scrap metal objects. They are most suitable for objects with high water content, such as fruits.



UHF has a wide range of action and fast data transmission speed, but they consume more energy, have weak penetration, and cannot have too much interference in the operation area. They are suitable for monitoring items transported from the seaport to the warehouse. Different frequency bands use different RFIDs. The thickness of the magnetic separator is also different. NFC payment antennas (used in mobile phones such as Samsung) are similar to RFID. Our company is a manufacturer of RFID anti-metal interference solutions-magnetic barriers. The provided 0.15mm0.2mm (ferrite) is suitable for NFC chips. Another application of the magnetic isolation sheet produced by our company is high-frequency anti-interference and magnetic isolation, which is an excellent solution to metal interference.
Product thickness (mm) 0.15mm 0.2mm 0.25mm 0.3mm 0.5mm 1.0mm
Product specifications (mm*M) 300mm*50M 300mm*20M
Applicable frequency (MHz) 13.56MHz
Applicable temperature (℃) -40~+80
Permeability (13.56MHz) μ′ 120
Product resistance (Ω/□) 1MΩ
Product density (g/cm3) 3.6
Product environmental protection ROHS
Corresponding application NFC antenna; RFID tag, reader; contactless IC card (EMI, EMC absorbs electromagnetic noise)

ferrite sheet:https://www.goodsmaterial.com/

Related Articles
The high permeability of shallow of absorbing materials plant absorbing material application

The high permeability of shallow of absorbing materials plant absorbing material application

2021-07-12

First of all, let's see what is high permeability absorbing material: high permeability refers to the…

Analysis of three functions of flexible Ferrite separator on wireless charging Coil in Absorbing Material factory?

Analysis of three functions of flexible Ferrite separator on wireless charging Coil in Absorbing Material factory?

2021-07-12

I have written a lot about the role of ferrite tablets before. Today, I will summarize the three main…

Here are five common NFC ferrite tablets on the market

Here are five common NFC ferrite tablets on the market

2021-07-12

Follow the footsteps of xiaobian, today summarized the next market common in 5 NFC ferrite tablets, I…

Leave A Message

Just tell us your requirements, We can do more than you can imagine.

Links: Bluetooth Speaker Passive Speaker Wooden Speakers USB Microphone

Shenzhen jingju technology co., LTD., all rights reserved ©2020
Hot Products:ferrite sheet | shielding material | electromagnetic shielding | magnetic sheet | amorphous nanocrystals