RFID stands for Radio Frequency Identification. RFID is a wireless identification system that allows data retrieval without having to touch such as barcodes and magnetic cards such as ATMs. RFID is now widely used in various fields such as companies, supermarkets, hospitals and even recently used in cars to identify the use of subsidized fuel.

The idea to create an article came when a short time ago there was a change of attendance system where I worked from barcode to RFID. The absent process that was originally swiped-swiped now becomes sticky-sticking and can even be enough to look-see without having to touch. How come? This is because RFID uses a electromagnetic radiation system to transmit codes (tags).

RFID or Radio Frequency Identifier is an identification method using a facility called an RFID label or transponder to store and retrieve data remotely. RFID label or card is an object that can be installed or inserted in a product, animal or even human for the purpose of identification using radio waves. RFID labels contain information that is stored electronically and can be read up to several meters away. RFID reader systems do not require direct contact like a barcode reader system (English: barcode).

The RFID label consists of a silicon microchip and an antenna. Some sizes of RFID labels can be as small as rice grains.

Passive labels do not need power sources, while active labels need power sources to function.

In 1945, Léon Theremin invented a spy device for the Soviet Union’s government that could re-emit radio waves with sound information. Sound waves vibrate a diaphragm (diaphragm) that changes the shape of the resonator slightly, which then modulates the reflected radio frequency. Although this device is a passive spy listening device and not an identity card / label, it is recognized as the first item and one of the ancestors of RFID technology. Some publications state that the technology used by RFID has existed since the early 1920s, while several other sources state that the new RFID system emerged around the end of the 1960s.

A more similar technology, IFF Transponder, was invented by the British in 1939, and was routinely used by allied troops in World War II to identify fighter jets. Such transponders are still used by the military and airlines.

Another early work exploring RFID was Harry Stockman’s important scientific paper in 1948 entitled Communication by Means of Reflected Power, published at IRE, pages 1196-1204, October 1948. Stockman estimates that “… More serious research and development must be carried out before the fundamental problems in reflection communication can be solved, and before applications (of this technology) are explored further. “

United States Patent number 3,713,148 in the name of Mario Cardullo in 1973 is the first ancestor of modern RFID; a passive radio transponder with memory. The first passive power reflection device was demonstrated in 1971 to the New York Port Authority and other potential users. This tool consists of a transponder with 16-bit memory to be used as a payment of customs duties.

Basically, Cardullo’s patent covers the use of radio frequency, sound and light as transmission media. The first business plan submitted to investors in 1969 featured the use of this technology in transportation (identification of automotive vehicles, automatic toll payment systems, electronic number plates, electronic manifests, vehicle route assessors, vehicle worthiness supervisors), banking (electronic check books, electronic credit cards), security (employee identification, automatic gates, access control) and health (patient identification and medical history).

Demonstration of RFID labels with reflected technology, both passive and active, was carried out at the Los Alamos Science Laboratory in 1973. This device was performed at 915 MHz and used a 12-bit label.

The first patent to use the word RFID was granted to Charles Walton in 1983 (United States Patent number 4,384,288).

The pioneering of RFID technology began when a Soviet spy (now = Russia) invented a system of sending radio waves through audio information. Sound waves that vibrate the diaphragm that has been formed into a resonator that modulates reflected radio waves. Although this tool is not an identification, it is considered as
the forerunner of RFID technology.

In addition there is also the IFF transponder technology used by British soldiers in World War 2 to identify aircraft as friends or enemies. The RFID device that became the forerunner to the modern RFID system is the Mario Cardullo Device, because it uses a passive radio transponder with memory. Cardullo’s basic patent covers the use of RF, sound and light as transmission media. RFID was offered to investors in 1969 including uses in the fields of transportation, banking, security and medical.

A radio frequency identification system uses tags or labels attached to the object to be identified. The two-way radio transmitter, which is referred to as a checker or reader, sends a signal to the tag and then reads the response. Generally, the reader sends these observations to a computer system running RFID software or software.

Tag information is stored electronically in non-volatile memory. RFID tags include small radio frequency transmitters and receivers. An RFID reader sends an encoded radio signal to check the tag. The tag then receives a message and responds to the information that it identifies. This might only happen for tags with special serial numbers, or maybe for a product that is related to information such as stock quantities, lots or batch numbers, production dates, or other specific information.

RFID system refers to an ID system that uses radio wave media. This term stands for Radio Frequency IDentification System. RFID reads / writes data from / to semiconductor memory by non-contact with the field of induction or radio waves.

A type of radio communication system with “RF tag (or data carrier)” and “Reader / Writer” transmits and exchanges data as needed.

An RFID label can be affixed to an object and used to track and manage inventory, assets, people, and others. For example, RFID labels can be affixed to cars, computer equipment, books, cellphones, and others.

RFID offers advantages over manual systems or the use of barcode. Labels can be read if they pass near the label reader, even if the reader is covered by objects or not visible. Labels can be read in a container, carton, box or other. RFID labels can read hundreds at a time, while barcode can only be read one at a time.

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