What is RFID?

RFID (Radio Frequency IDentification) was developed for the traceability and access applications for more than 20 years ago. Like the optical reading of characters, bar codes, smart cards and in some cases, the biometric technologies (reading of hand and face geometry, fingerprint, iris, voice recognition, etc.), RFID is an Automatic Identification and Data Capture technology, ie AIDC.

All AIDC technologies allow identification and / or collection of data into a computer system without using the keyboard or a pointing device. The fundamental objective is to eliminate errors and increase the speed of the identification process.

RFID receives information in an application without physical or visual contact with the object, which is the main advantage compared to other AIDC technologies.

Today, RFID technology also has reading and writing opportunities in an "anti-collision" protocol, which allows it to read a wide number of identified items that are in the field of the reader and claiming that each tag is read only once.

There are many different types of RFID systems that all have their pros and cons..

A typical RFID system consists of two main parts:

1. An RFID reader with an associated antenna, a power source and a modulation unit.

2. A passive RFID tag (this includes the RFID cards, key fobs or any other type of tag)

For the system to generate a useful feature, so some form of underlying computer system that can interpret the information is needed.

In a passive RFID system, the reader serves as the energy supplier for the transponder. The transmitted RF field from the reader induces a current in the tag's antenna, which "wakes up" the tag. The date that the tag then wants to send is modulated with the transmitter field, which causes a "ripple" that the the reader can register. The reader module then re-modulates the ripple signal to interpret the data that the tag has sent out.

By using the energy from the reader, the tag can t a response that the readerthen transmit to the underlying systems.

The tags mentioned so far are passive, but there are also active tags. The active tags have their own energy source, a battery. They are often physically bigger and more expensive. The active tags are used to communicate over greater distances.

RFID is today used for bus passes, lift tickets, access systems, passing through customs, pay stations, passports, theft in shops, reservation systems, libraries, electronic tickets, etc.

Please contact us to get more information about RFID.

What is RFID?

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