FIELD: radio engineering, communication.
SUBSTANCE: invention relates to wireless data transmission and can be used in non-cash payment transactions. Signals with different frequency are combined in an antenna system (M) of a receiver (1) and a transmitter (2) and then the carrier signal is separated from the result of the combined signals and the transmitted data are demodulated. The difference between the frequencies has a value which corresponds to the value of the subcarrier frequency to which the receiver (1) is preset. During transmission the transformer connection coefficient can have the value k=0.2 - 0.001, while the antenna (3) of the receiver (2) is tuned narrowly to the frequency of the transmitter (2) without considering the subcarrier frequency. The transmitter is preferably located on a memory card or on a card with a format and interface of a memory card, e.g. micro SD.
EFFECT: high reliability of transmitting data, particularly through a mobile telephone using an RFID and/or NFC platform.
15 cl, 6 dwg
