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How Does RFID Technology Work

Views:0     Author:Site Editor     Publish Time: 2018-02-27      Origin:Site

RFID is an acronym for “radio-frequency identification” and refers to a technology whereby digital data encoded in RFID tags or smart labels are captured by a reader via radio waves. RFID is similar to barcoding in that data from a tag or label are captured by a device that stores the data in a database. RFID, however, has several advantages over systems that use barcode asset tracking software. The most notable is that RFID tag data can be read outside the line-of-sight, whereas barcodes must be aligned with an optical scanner.

1. What Is RFID?

Radio-Frequency Identification(RFID) is the use of radio waves to read, capture, and interact with information stored on a tag. Tags are usually attached to objects, and can be read from several feet away. Furthermore, the tag doesn’t always have to be in the direct line-of-sight to initiate interaction.

The RFID tag is an easy way to assign a unique identity to an object. Additionally, they do not need an internal power source, while a tag can be as small as a grain of black pepper. Meaning they are easily embedded almost anywhere — hence their popularity.

2. How Does RFID Work?

A basic RFID system comprises two parts: the tag, and the reader.


The RFID tag has an embedded transmitter and receiver. The actual RFID component contained in a tag has two parts: an integrated circuit for storing and processing information, and an antenna to receive and transmit a signal. The RFID tag has non-volatile memory storage, and can included either fixed or programmable logic for processing transmission and sensor data.

RFID tags can be passive, active, or battery-assistive passive.

A passive RFID tag is the cheapest option, and features no battery. The tag uses radio energy transmitted by the reader.

An active RFID tag features an on board battery, periodically transmitting its credentials.

A battery-assistive passive tag also features a small on board battery, but is only activated when in the presence of an RFID reader.

Furthermore, a custom RFID tag may be either read-only, or read/write. A read-only RFID tag has a factory assigned serial number used for identification in a database, while a read/write RFID tag can have specific custom data written to the tag by the user.


The RFID reader features a two-way radio transmitted-reciever (transciever), sometimes referred to as an interrogator. The transceiver transmits an encoded radio signal to interogate the RFID tag. The radio signal essentially wakes or activates the tag. In turn, the tag transponder converts the radio signal into usable power, and responds to the reader.

Above is how the RFID Technology works, we hope this article will give you a better understanding of the RFID technology. Whether you are interested in the RFID technology, or want to know more about RFID card, RFID tag and other RFID products, we all have relevant articles for you to see, we hope you can get what you want from our site.

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