An intelligent 2.45 GHz beam-scanning array for modern RFID reader

As part of the general identification procedure, radiofrequency identification (RFID) is an essential field of research in the modern industrial automation. Radio frequency identification is among the most technically advanced methods of collecting data automatically. This paper presents an intelligent 2.45 GHz beam-scanning array for a RFID reader. The design is based on the paper industry´s needs but is still applicable to other fields of industry. A new current amplitude distribution is applied to feed the array elements. With this amplitude current distribution the -37.5 dB sidelobe level is achieved while maintaining the half power beamwidth at the same level as the Dolph-Chebyshev current amplitude distribution with a sidelobe level of -30 dB. Thus, the new distribution is a compromise of binomial and Dolph-Chebyshev. The system level description of the intelligent beam-scanning array is also discussed