Interrogators (RFID)

Interrogators

Decoders are parts that read the data on the tags by first stimulating the tags with a signal then the tag is like awakened and sends back a low reply tuning into the wave of the reader thus transmitting the programmed information it contains. The distance that these tags can be examined is usually short and the data is limited.

Radio Frequency Identification (RFID) is a means of identifying an object or person using a radio frequency transmission. RFID is best understood as a ‘next generation bar code’ but this description only doe’s partial justice. Tags can carry information such as serial numbers, model numbers, color, and place of assembly or other types of data. Not a new technology. Recent advances, heightened security concerns & emphasis on cost controls have surfaced the technology. RFID has ignited the interest of firms that want to increase the accuracy & flexibility of production, logistics, & selling activities.

What are the RFID tag Components and functions

Tag Components and Functions

Looking through the basic parts of tags, the transmitter is like those of any other ordinary radios, serving similar functions. Its main role is in the receipt and transmission of radio waves. Considering however its size, its capability is limited. Nevertheless, this again varies according to the type of radio frequency identification. Passive tags would only be powered as it receives radio waves, but, the electromagnetic field may be within tags in case of multiple tags in a container.

Source: IBM Corporation 2004 (Schaeffe,Stefen et al., 2004)

Radio frequency identification tags whether it is a passive of active type has its cryptogram credentials electronically encoded into its integrated circuit or commonly called IC. This minimal cryptogram is usually modified to avoid the dangers of deletion . This is likewise the specific part that must be enhanced to maintain the tag’s integrity.
According to Schaeffer et al, radio frequency identification coordinates electronic supervision as well as decision in the absence of individual interference. Radio frequency identification infrastructure can detect presence of tags and further take appropriate actions to messages.

Figure 6 Tag with label

The RFID chip or the so called integrated circuit (IC) and an antenna are usually placed into some form of shielding devise, which can be as bulky as a credit card or miniaturized to fit on a finger tip, depending on the application and tag manufacturer or the requirement specified by the end user.

Figure 7 Other features of tags

These are the different tags that are commonly sold in the market; however, some are not visually readable within line of sight because it is embedded inside the item. These tags are assigned in a different appropriate package.