Access control

Access Control These devices emit radio waves to communicate with the tags/cards. They can be fixed at entry points or integrated into handheld devices. In the case of access control, RFID tags hold the credential information that, when placed near a compatible reader, will transmit the info to unlock the door.


    RFID access control: System overview

    RFID is a popular solution for indoor access control systems. RFID access control systems are widely used in various industries and are known for their reliability and durability. In commercial access control systems, RFID-enabled tags are usually attached to employees' ID cards, or they are given unique access cards for their office. This provides a simple way for any company to deploy an access control solution that allows for unique credentials.



      How RFID tags work for door access

      The RFID applications for personnel identification typically operate at quite a low frequency, almost 140 kHz, for badge detection. The information of a cardholder, object, or reader is electronically stored in the RFID cards or tags, which can contain small pieces of information such as identification numbers, prices, or codes. Door readers use this same technology. Each RFID reader is equipped with a small antenna, which sends its own radio waves to detect any RFID tag or card within its range. This range can vary for each reader depending upon the frequency of the radio waves it emits, anywhere from about 10 centimeters (~4") to around one meter (~1'). The RFID reader decodes the info from the RFID tag and sends the signal to its host software, which either grants or denies access to the user.