A method and structure improves a reading efficiency for RFID tags located in a reading zone of a RFID reading apparatus. A structure is interposed between the RFID tag(s) and the RFID reading apparatus. The structure is essentially electrically non-conductive and comprises a network of RFID antennas. The network of RFID antennas network is positioned on the structure in a pattern whose periodicity in two dimensions is less than half an operating RFID wavelength, so as to create a three dimensional interferometric pattern with peaks of electromagnetic field intensities. The RFID reading apparatus or the at least one RFID tag is set in motion, relatively to one another. The at least one RFID tag is read by the RFID reading apparatus during the relative motion within the reading zone so that the three dimensional interferometric pattern shifts and thereby improves the reading efficiency.