{"id":4501,"date":"2019-05-22T10:48:26","date_gmt":"2019-05-22T10:48:26","guid":{"rendered":"https:\/\/elainnovation.com\/active-rfid-vs-passive-rfid-what-are-the-differences\/"},"modified":"2024-10-23T15:02:44","modified_gmt":"2024-10-23T13:02:44","slug":"active-rfid-vs-passive-rfid-what-are-the-differences","status":"publish","type":"post","link":"https:\/\/elainnovation.com\/en\/active-rfid-vs-passive-rfid-what-are-the-differences\/","title":{"rendered":"Active RFID Vs Passive RFID: what are the differences?"},"content":{"rendered":"\n

R<\/strong>adio F<\/strong>requency Id<\/strong>entification (RFID) is frequently used on a daily basis, without us even realizing it, in various and varied fields of activity. It makes it possible to convey data, to memorize them and to retrieve them remotely thanks to radio waves. RFID<\/strong> is often used for product identification and the automatic collection of information on items, without any physical connection<\/strong>, unlike other technologies such as gencode for example. It can be declined mainly in two different ways. It is then a question of active RFID<\/strong> or passive RFID<\/strong>.<\/p>\n\n

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Basic principle of RFID<\/strong><\/h2>\n\n

The basic systems of RFID<\/strong> are made up of several components. Among them, the tag<\/strong>, also called “radio tag<\/strong>“, composed of an electronic chip<\/strong> for identification and data storage, an antenna<\/strong>, used for communication, and a reader<\/strong> or interrogator<\/strong> for the transmission and reception of waves. A computer and software are also required for data storage and analysis. Depending on the type of radio tag used, no battery or battery is required (passive tags), a battery may be needed only for the emission of the wave (semi-passive tags) or to power the tag and for the emission of the wave (active tags).<\/p>\n\n

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RFID TAG<\/strong><\/h3>\n\n

The RFID tag<\/strong> is a fundamental support of electronic identification<\/strong>. It is often composed of two main elements: an antenna<\/strong>, receiving the waves, and an electronic circuit, in charge of processing and storing the information. In other words, it houses an identifier and data on a chip, itself connected to the antenna. The tag thus exchanges data with a reader via radio waves. Widely used in RFID, the tag is very useful to meet traceability requirements<\/strong>, for example, since it does not necessarily need to be seen to be detected and, therefore, read.<\/p>\n\n

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READER<\/strong><\/h3>\n\n

The reader<\/strong> is an electronic device used for transmitting and receiving electromagnetic waves<\/strong>. It detects and recognizes the tag’s identification information through the identifier provided by the chip manufacturer. It is also able to decode the information<\/strong> carried by the incident wave thanks to a decoder.<\/p>\n\n

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RFID ANTENNA<\/strong><\/h3>\n\n

The RFID antenna<\/strong> can capture and emit electromagnetic waves<\/strong>. The frequency of emission depends on the type of antenna, its length and the frequency set in the chip. Depending on the desired application, the antenna should be inexpensive, non-invasive and as environmentally friendly as possible. In order to maximize energy transmission, the impedance of the antenna must be equivalent to the impedance of the electronic chip contained in the tag. In most cases, this impedance<\/strong> has a value of 50 omega<\/strong>.<\/p>\n\n

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COMPUTER<\/strong><\/h3>\n\n

The computer and software<\/strong> are used to store the information<\/strong> collected by the reader. In some situations, they may also control the player.<\/p>\n\n

\"schema-fonctionnement-rfid-active\"<\/figure>\n\n

Basic RFID Operation<\/em><\/p>\n\n

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Active RFID \n<\/strong><\/h2>\n\n

First of all, it can be a question of active RFID<\/strong>. In this first case, the tags are powered by an embedded energy source<\/strong>. It can be a battery or a cell, for example, allowing the operation of the tag and the emission of its data.<\/p>\n\n

Active RFID<\/strong> is used in a number of sectors, including construction<\/strong>, public works<\/strong>, security<\/strong> and home automation<\/strong>. Active tags are largely used for monitoring physical quantities<\/strong> (temperature, humidity, movement). This is particularly the case for monitoring the cold chain in refrigerated lorries. They can also be used to identify and track people for safety purposes on building sites. Finally, they can also be used for access control<\/strong> or automatic identification of goods<\/strong>. \n \nTranslated with DeepL.com (free version) \n

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Pros<\/h3>\n\n\n\n