What is RFID .
Radio Frequency Identification (RFID) is an radio waves sensor technology, relying on storing and remotely retrieving data using devices called RFID tags readers. An RFID tag is a small chip that can be attached to an object it could be a simple box or an animal, or person for the purpose of identification using radio waves. Chip-based RFID tags contain silicon chip and antenna. Passive tags require no internal power source, whereas active tags require a power source.
Types of RFID tags
Passive RFID tags have no internal power supply. A minute electrical current is induced in the small circuit as it is brought in the special magnetic region, generated by the tag Reader. This small power is sufficient to em-mite the response signals. Which can be traced by the Reader.
Unlike passive RFID tags, active RFID tags have their own internal power source which is used to power any ICs that generate the outgoing signal. Active tags are typically much more reliable than passive tags due to the ability for active tags to conduct a “session” with a reader. They are more reliable in magnetic field ore naturally challenged region.
The RFID system
An RFID system may consist of several components: tags, tag readers, edge servers, middleware ( eg. Sun Java System RFID Software, IBM RFID Middle-ware), and enterprise application software.
The purpose of an RFID system is to enable data to be transmitted by a mobile device, called a tag, which is read by an RFID reader and processed according to the needs of a particular application. The data transmitted by the tag may provide identification or location information, or specifics about the product tagged, such as price, color, date of purchase, etc. RFID is being so popular because its ability to track moving objects. As the technology is refined, it is being used in different areas like asset tracking, transportation, inventory management, defense, health care etc. ..
How to develope a RFID prototype application
To develope a RFID prototype, companies like Java, IBM , sybase are we provideing their middleware . Sun has its SUN RFID 1.3 package , similarly IBM is also providing a framework to develope, test and deploy a rfis solution. IBM provides a architecture comprising Device developer kit ( will be used to develope edge controller which will controll rfid related hardware), RFID premises server which works between edge controler and your enterprise application.
feel free to ask more queries\details on RFID :