New look at the synthesis of antenna for UHF RFID transponder

The design of UHF transponder begins with the elaboration of the antenna that should be customized to the selected chip. Frequency bands, specific characteristics of target objects, the application requirements, etc. should be taken into consideration. The developed technology of designing and manufacturing an RFID transponder based on ecological aluminum milling is presented in this paper. It is a significant innovation compared to the currently used technique of producing RFID antennas by the etching method. The advantages and disadvantages of both methods of producing the transponder antennas are indicated. In the design of the transponder antenna it is obligatory to take into consideration the requirements of the antenna manufacturing process (e.g. minimum widths of conductive paths, etc.). Therefore, a set of recommendations and procedures were developed according to which its numerical model should be prepared. The antennas structure designed and simulated by using Ansys HFSS Electronics Desktop software is described in details. The analysis of the construction and simulation results together with resemblance with experimental data is presented and deduced.