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All about RFID Technology

userArvind Katiyar   calender 18 Jan 2020 Barcode  RFID

RFID or Radio-Frequency Identification means using radio waves to read, capture, and relate with data or information kept on a tag. Tags are commonly linked to objects, and can be read from considerable distance. Additionally, the tag doesn’t constantly have to be in the straight line-of-sight to begin interaction.

An RFID tag is a simple way to allocate a distinctive identity to an object. Moreover, they do not require an internal power source, though a tag can be as trivial as a grain of wheat. Implying they are easily fixed almost anywhere and hence their popularity.

How Does RFID Work?

A basic RFID system includes two parts: a tag, and a reader.


A RFID tag has an inserted transmitter and receiver. The real RFID component confined in a tag has two parts: an incorporated circuit for keeping and processing the information, and an antenna to get and transmit a signal. A RFID tag has excellent non-volatile memory storage, and can incorporate either programmable or fixed logic for handling transmission and sensor data.

How Does RFID Technology Work? 

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

   •  A passive tag is the most low-cost option, and has no battery. The tag makes use of radio energy conveyed by the reader.

   •  An active tag comprises an on-board battery, sporadically transmitting its credentials.

   •  A battery-assistive passive tag also possess a small on-board battery, however, it is only triggered when it comes in the presence of an RFID reader.

   •  Besides, a tag may be either read/write or read-only. A read-only tag comprise a factory allocated serial number for identification in a database, whereas a read/write tag can have definite custom data inscribed to the tag by the user.


The RFID reader possess a two-way radio transmitted-receiver or transceiver, occasionally denoted to as an interrogator. This receiver transmits an encrypted radio signal to cross-examine the tag. The radio signal really wakes or activates the tag. While, the tag transponder changes the radio signal into operational power, and replies to the reader.

Types of RFID System

We normally categorise the category of RFID system by the type of tag and reader. There are usually three common combinations:

Passive Reader Active Tag (PRAT)

The reader is passive, only getting radio signals from an active tag. As the tag is battery driven, the transmission/reception range can be between 0 to 2,000 feet (0-600m). So, PRAT is a great flexible RFID solution.

Active Reader Passive Tag (ARPT)

The reader is active, conveying an interrogator radio signal, getting authentication signal responses from passive tags.

Active Reader Active Tag (ARAT)

The reader is active, and relates with active tags.

Common RFID Uses

RFID tags are ubiquitous. Since they’re simply attached to practically anything, have no power necessity, and are really minute, they can be used in all walks of life, comprising:

  • Person and animal tracking

  • Contactless payments

  • Goods management and tracking

  • Travel documents

  • Healthcare data management

  • Barcodes and security tags

  • Timing

RFID is also creating momentum in the progressing smart home market. In the year 2010, the cost of RFID considerably reduced. Simultaneously, RFID dependability augmented due to worldwide drive in RFID standards. Unexpectedly, an enormously reliable but economical identification or tracking system was accessible.

RFID is here to Stay

RFID is a huge industry. We use it nearly every day. The parcel that comes at your house, your door-opening smart home hand-implant, and the card you paid for your lunch, and more, all use RFID.

And as it RFID progresses, so will its uses — thrilling times!