RFID, Radio Frequency Identification and Detection

RFID is a tracking technology used to identify and authenticate labels that are applied to any product, individual or animal. Broadcast frequency Identification and Detection is a general term used regarding technologies that make use of radio waves in order to identify things and people.

Purpose of Radio frequency Identification and Detection strategy is to facilitate data transmission through the portable device called tag that is read with the help of RFID reader; and method it as per the needs of an application. Information transmitted with the aid of tag offers location or identification along with other specifics regarding product tagged – purchase date, color, and selling price. Typical RFID tag includes microchip with radio antenna, mounted on substrate.

The RFID tags are configured as a solution and receive signals from an RFID transceiver. This allows tag words to be read from a distance, unlike other forms of authentication technological know-how. The RFID system has gained wide acceptance inside businesses, and is gradually replacing the barcode system.


Basic RFID consists of an antenna, transceiver and transponder.
Antenna emits the radio signals to activate tag and read as well as write information to it. Reader emits radio stations waves, ranging from one to 100 inches, on the basis of used broadcast frequency and power output. While passing through electronic permanent magnet zone, RFID tag detects activation signals of viewers.

Powered by its internal battery or by the viewer signals, the tag sends radio waves back to you. Reader receives these waves and identifies the volume to generate a unique ID. Reader then decodes data encoded in integrated circuit of tags and transmits the item to the computers for use.

Types of RFID

Active and recurring RFID are different technologies but are usually evaluated together. Although both of them use the radio frequency for communication in between tag and reader, means of providing power to tags differs from the others. Active RFID makes use of battery within tag for supplying continuous power to tag and radio frequency power circuitry. Passive RFID on the other hand, relies on energy of radio number transferred from reader to tag for powering them.

Passive RFID needs strong signals from reader although signal strength bounced from tag is at low levels. Productive RFID receives low level signals by tag but it can produce higher level signals to readers. This type of RFID is constantly driven, whether in or out of the reader’s field. Active tag cloud consist of external sensors for checking humidity, temperature, action as well as other conditions.

RFID frequencies

Just like you can tune any radio in various frequencies for listening to different channels, RFID readers and tags need to be tuned in to a same frequency for communication. RFID system uses various frequencies most common and popularly used frequency is low, substantial and ultra high frequency. Low frequency is around 125 KHz, high is around 13. 56 MHz and ultra huge varies between 860-960 MHz. Some applications also make full use of microwave frequency of 2. 45 GHz. It is imperative to pick right frequency for an application as radio waves perform different at various frequencies.

History and key developments

RFID has been around since II World War but was seen as too limited and expensive in functionality for most of economic use. With advancement in technology, cost of system components provides reduced and capabilities have increased, making RFID popular.

Léon Theremin invented a surveillance tool for Soviet Union in the year 1945. This tool retransmitted the occurrence radio waves along with audio information. Sound waves vibrated diaphragm that altered the shape of resonator, modulating mirrored sound frequencies. This tool was not identification tag nonetheless a secret listening device. But it is still considered as precursor of the RFID technology due to it being energized, passive and stimulated by outside electromagnetic waves. Similar systems as IFF transponder was invented in UK in 1915 and was regularly used by allies in the II World War for identifying aircrafts as foes or perhaps friends. The transponders are used for by powered aircrafts right up until date. Know more about RFID [ https://www.starnfc.com/product-category/rfid-card/ ] Click above the link.

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