A method for wirelessly receiving and transmitting electromagnetic radiation, the method comprising: - wirelessly receiving a first electromagnetic radiation; - storing energy of the received first electromagnetic radiation in an energy storage; - determining that a parameter indicative of the energy stored in the energy storage indicates that the energy stored in the energy storage is higher than a first predefined value and supplying energy from the energy storage to: • a demodulator and a comparator such that the demodulator and the comparator are in a switch on state, or • a modulator and a transmitter such that the modulator and the transmitter are in a switch on state; - wirelessly receiving a second electromagnetic radiation; - the demodulator in a switch on state, demodulating the second electromagnetic radiation so that a first signal is generated, wherein the demodulating step is performed by the demodulator; - the comparator in a switch on state, comparing the first signal with a set of signals to determine a match, wherein the comparing step is performed by the comparator; - wirelessly receiving a third electromagnetic radiation; - the modulator in a switch on state, modulating the received third electromagnetic radiation into a fourth electromagnetic radiation; wherein the modulating step is performed by the modulator and comprises: - modulating a first portion of the third electromagnetic radiation into the fourth electromagnetic radiation using a first modulation; - modulating a second portion of the third electromagnetic radiation into the fourth electromagnetic radiation using a second modulation different from the first modulation, thereby modifying data contained in the second portion of the third electromagnetic radiation; - the transmitter in a switch on state, wirelessly transmitting the fourth electromagnetic radiation, wherein the wireless transmitting step is performed by the transmitter. - wirelessly receiving a first electromagnetic radiation; - storing energy of the received first electromagnetic radiation in an energy storage; - determining that a parameter indicative of the energy stored in the energy storage indicates that the energy stored in the energy storage is higher than a first predefined value and supplying energy from the energy storage to: • a demodulator and a comparator such that the demodulator and the comparator are in a switch on state, or • a modulator and a transmitter such that the modulator and the transmitter are in a switch on state; • a demodulator and a comparator such that the demodulator and the comparator are in a switch on state, or • a modulator and a transmitter such that the modulator and the transmitter are in a switch on state; - wirelessly receiving a second electromagnetic radiation; - the demodulator in a switch on state, demodulating the second electromagnetic radiation so that a first signal is generated, wherein the demodulating step is performed by the demodulator; - the comparator in a switch on state, comparing the first signal with a set of signals to determine a match, wherein the comparing step is performed by the comparator; - wirelessly receiving a third electromagnetic radiation; - the modulator in a switch on state, modulating the received third electromagnetic radiation into a fourth electromagnetic radiation; wherein the modulating step is performed by the modulator and comprises: - modulating a first portion of the third electromagnetic radiation into the fourth electromagnetic radiation using a first modulation; - modulating a second portion of the third electromagnetic radiation into the fourth electromagnetic radiation using a second modulation different from the first modulation, thereby modifying data contained in the second portion of the third electromagnetic radiation; - the transmitter in a switch on state, wirelessly transmitting the fourth electromagnetic radiation, wherein the wireless transmitting step is performed by the transmitter. - modulating a first portion of the third electromagnetic radiation into the fourth electromagnetic radiation using a first modulation; - modulating a second portion of the third electromagnetic radiation into the fourth electromagnetic radiation using a second modulation different from the first modulation, thereby modifying data contained in the second portion of the third electromagnetic radiation; - the transmitter in a switch on state, wirelessly transmitting the fourth electromagnetic radiation, wherein the wireless transmitting step is performed by the transmitter.