RFID readers are also referred to as interrogators because
they query tags as the tags enter their read range. The reader is
responsible for orchestrating the communication with any tags
in its read range and then presenting the tags’ data to an
application that can make use of the data.
Readers in all systems can be reduced to two fundamental
functional blocks: the control system and the high frequency
(HF) interface, consisting of a transmitter and receiver, as
shown in Fig.3. The entire system is controlled by an external