What is RFID Card
Radio frequency identification (RFID) uses electromagnetic fields to automatically identify and track tags attached to objects.
The RFID system consists of a miniature radio transponder, a radio receiver and a transmitter.
RFID cards are used in applications that need to track or identify people or need access control. Today, various RFID frequency bands are used in cards, including 125 kHz low frequency proximity, 13.56 MHz high frequency smart cards and 860-960 MHz ultra high frequency (UHF).
Proximity cards and smart cards are often referred to simply as “RFID cards”. The type of RFID frequency band used depends on the application and takes into account the security level, read range and data transmission speed requirements.
125 kHz (LF)-Universal proximity card format, used for employee badges and door and door access control. Commonly used chips are TK4100, EM4100, EM4305, T5577
13.56 MHz (HF)-a higher security format used for credit cards and employee badges for physical and logical access control.
860-960 MHz (UHF)-UHF card has a reading range of up to 50 feet, used for identification, access control and transaction processes
Comparison of advantages and disadvantages of low frequency, high frequency, and UHF radio frequency technology
RFID system is divided from the working frequency band: it is divided into low frequency (125Khz~134Khz), high frequency (13.56Mhz), ultra high frequency (860MHz~928Mhz global standards vary), microwave (2.45Ghz, 5.8Ghz).