IT: device to device communication
IT: device to device communication

Start this free course now. Just create an account and sign in. Enrol and complete the course for a free statement of participation or digital badge if available.

Free course

IT: device to device communication

7.3 RFID technology

There are three main components in an RFID system:

  • A tag (consisting of electronic circuitry and an antenna), which acts as a data store and wireless transponder. (A transponder is a device that automatically sends a signal in response to interrogation from another device.)

  • A reader (consisting of electronic circuitry and an antenna), which acts as a controller unit and transceiver. (In Section 2 you were introduced to the term 'transceiver' – a device that transmits and receives signals.)

  • A host computer system that processes and manages the information it receives from the reader.

Figure 18 illustrates the relationship between these components.

Figure 18
Figure 18 Representation of a simple RFID system

A reader can interrogate multiple tags and send the data from each to a host computer, which in turn could be connected through a network to other computers in an RFID system (Figure 19). In this way, the data from a tag on an item could be recorded as it travels from the manufacturer, to the warehouse, through the distribution and transport networks, to the retailer, to the point-of-sale terminal and even beyond. The data could be stored on a central database to provide a complete history of the item.

Figure 19
Figure 19 Representation of a simple networked RFID system
Skip Your course resources

Take your learning further

Making the decision to study can be a big step, which is why you'll want a trusted University. The Open University has 50 years’ experience delivering flexible learning and 170,000 students are studying with us right now. Take a look at all Open University courses.

If you are new to University-level study, we offer two introductory routes to our qualifications. You could either choose to start with an Access module, or a module which allows you to count your previous learning towards an Open University qualification. Read our guide on Where to take your learning next for more information.

Not ready for formal University study? Then browse over 1000 free courses on OpenLearn and sign up to our newsletter to hear about new free courses as they are released.

Every year, thousands of students decide to study with The Open University. With over 120 qualifications, we’ve got the right course for you.

Request an Open University prospectus371