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WHAT IS RFID?

Radio frequent identification (RFID) technologies are automated identification systems, which in recent years have very successfully been installed for many different applications.

It is a contactless communication-technology, which provides information on identification of people, animals, goods and objects.

 

In many cases the barcode is no longer sufficient in the identification processes.

 

Barcodes are of course cheap to create, but they are limited in their storage capacity and are not flexible, when data needs to be changed.

The transmission of data through electro-magnetic waves is much more flexible. Such transponders are available for many different applications can be packaged in many different ways.

They are high-performance code-carriers which only need very small space. They do not need any servicing, as they are passive and don’t have their own source of energy.

 

 

The RFID-Reader direct the routine for communication with the transponder. The read/write distances can also be influenced by the size of the transponder, the antenna and especially the frequency.

 

 

There are two different RFID technologies available:

 

 

Passive tags have no own power source and take their energy directly from the magnetic field of the reader. Passive RFID tags don’t need any maintenance, but the reading distance depends on the size and frequency of the transponder and antenna.

 

 

Active tags are much more complex than passive tags and have an internal battery to increase the reading distances. The life time of active tags is limited through the battery. The manufacturing is more expensive, that’s the reason why the price for active tags is much higher compared to passive systems.

 

 

There are systems with 134.2kHz, 125kHz, 13.56MHz, 868MHz, 915MHz, 2.45GHz available, every system has different properties and reading distances depending on the environmental conditions.

 

 

Please contact our RFID team - We’ll help you to find the best hardware for your application!

 

Functionality:

 

 

The RFID read/write device creates a weak electro-magnetic field. If a RFID tag passes this field, the microchip of the transponder wakes up and can send or receive data without any contact to the reader.

 

If the tag leaves the field, the communication gets interrupted and the chip on the tag stops working, but the data on the tag keeps stored.

 

 

High end reading systems are able to communicate to several tags in the magnetic field simultaneously, such functions are called “anticolision”. The magnetic field of the reader can read through different materials like wood, paper or plastic covers.