High frequency card reader is a card reader that works in the high frequency HF band. It generally works in the 13.56M frequency band. Sensors at this frequency no longer need coils to be wound, and antennas can be made by etching them alive and printing them. Inductor usually works by load modulation, that is, the voltage on the antenna of reader is changed by the switch on and off of the load resistor on the inductor, so as to realize the amplitude modulation of the antenna voltage by the remote inductor.
Kimeery is based on its own technology development with more than 10 pieces patents.