Target radar cross section (RCS) can be expressed as a function of complex frequency domain in complex (s) plane. According to the singularity expansion method (SEM), the object calculation for target scattering singular point or residuet radio frequency identification (RFID) is a new idea of radio frequency identification. Through the FEKO software, chipless tags butterfly structure is simulated to obtain the scattering field. The simulation results show that the structure has many advantages, such as more slot number, poles distribution, large data capacity, easy implementation, etc.%目标雷达散射截面(RCS),在复平面可以表示为复频域的函数.根据奇点(SEM)展开(留数)方法,计算对目标物体的散射奇点(留数),进行射频识别(RFID),是射频识别的新思路.通过FEKO软件,对蝶形无芯标签结构进行仿真得出该结构散射场.仿真的结果显示该结构具有开槽数量多、极点分布规律、数据容量大、易于实现等优点.
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