RFID – The Waves of the Modern Life

Posted on May 16, 2018

RFID, Why Do You Need It?

RFID (Radio Frequency IDentification) is a form of communication without any physical connection such as wire etc. It uses radio waves to scan/read and get/capture data from an RFID tag that is attached to a product/object. It uses the electromagnetic coupling in the radio frequency area of the electromagnetic spectrum to identify a product/object.

The read range could be up to several feet away. RFID consists of 2 parts,

1. RFID Tags:

The RFID tag is the one that is attached to a product/item. Each RFID tag is identified by a unique code or serial number, which is market for a specific product/item. The 2 RFID Tag components are,

a. An Antenna: To receive and transmit a signal

b. A microchip, which stores and process the data

2. RFID Reader:

RFID Reader is used to read/gather the information from the RFID Tags through a two-way radio transceiver (transmitter/receiver). This transceiver is called an interrogator. The interrogator is a reader that emits signals to the tag through an antenna. The RFID tag responds with the data that is written in its memory storage. The interrogator will then sends the read results to an RFID computer application.

RFID Standards:

The RFID Standards are classified into 6 types,

Class 0:

These type of tags uses ultra-high frequency (UHF). They are pre-programmed passive tags and read-only tags.

Class 1:

These type of tags uses ultra-high frequency (UHF) or high frequency (HF). They are Write Once Read Many (WORM) tags.

Class 2:

These type of tags are passive read-write tags, which can be written at any point in the supply chain process.

Class 3:

hese type of tags of Read-write type. They come with sensors on board, which are capable of storing information like pressure, temperature and movement. These tags can be either semi-passive or active.

Class 4:

These are Read-write active tags with transmitters integrated into that, which can be used to communicate with other tags and/or readers.

Class 5:

These are Read-write active tags with transmitters integrated into that, which can be used to communicate with other tags and/or readers. These tags also provide power to other tags and also communicate with devices.

Future of RFID:

RFID has become increasingly popular in modern-day wireless deployments. It is greatly used to support the Internet of Things (IoT). RFID combined with other smart sensors, GPS etc, to help gather key proximity parameters such pressure, temperature, location and movement etc, and strengthen various IoT based deployments.

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