面积限定下13.56MHz RFID天线的仿真和设计

摘要

由于在实际环境下，产品对天线的尺寸有着一定的限制，所以对面积限定下天线磁场强度的研究具有一定的价值.简要介绍了RFID系统的基本工作原理，并通过三维电磁仿真软件Ansoft HFSS和MATLAB软件在面积限定的条件下对不同线宽、线距和匝数的环形天线的磁场强度进行了对比，旨在找出在面积限定下具有较强磁场强度的环形天线的设计参数，对实际设计13.56MHz PCB平面 RFID读写器天线具有一定的参考价值.%In a real environment, the products have certain restrictions on the size of antennae; as a result, there has the reference value in the research of antenna’s magnetic field strength with area limited. This paper briefly introduces the basic working principle of the RFID system, and uses the 3D electromagnetic simulation software Ansoft HFSS and MATLAB software to make a comparison of magnetic field strength between different designs which have different track widths, track clearances and coil loops with area limited. Trying to find out specific parameters of a loop antenna with area limited that has a good magnetic field strength. This has some reference value for the design of the PCB plane antenna in 13.56MHz RFID reader systems.