Parallel Resonant Scheme with Adapter of Impedance, Coupled Magnetically, for RFID Devices

In the operation of the Radio Frequency Identification Devices (RFID), it is important to transmit the biggest quantity of current from the antenna toward the electronic scheme of the receiver. In the work a variant of parallel tuned circuit is analyzed, coupled inductively, that guarantees to obtain a bigger current for the receptor load, that the up to now reached with the outlines reported for these devices. With this outline it is also possible to increase the selectivity of the receiver concerning the schemes used traditionally, which is a very interesting aspect for some applications of these devices. The characterization and confirmation of the proposed scheme and the obtained results, they are carried out using simulation tools of "Matlab" and through of experimental measurements. Finally the results obtained practically are analyzed, they are compared with both simulation and theoretical, and the effectiveness of the proposed scheme, in this work, is demonstrated in order to achieve a bigger current transmission toward the load in the receiving block, objective declared initially.