RFID Systems

what are the components of a RFID System?

The basic RFID system consists of three main components , the coil, the transponder and the decoder (transreceiver). The coil works like an antenna to emit radio signals which inturn writes and reads the data that is available on the Tag.

The Tags can be classified into two parts active and passive tags. Active tags are those tags which have a battery source installed into the tag and are usually read/write, whereas the passive tags are read.

The tags can be further classified based on the frequencies which are LHF, HF and UHF. The LHF can have the frequency anywhere from 30Khz to 500 Khz, the HF from 850 Khz to 950 Khz and the UHF will have from 2.4 Ghz to 2.5 Ghz. More the frequencey they become microwaves.