A loop Yagi-Uda array can be used as an efficient, polarization independent and narrowband absorber in the THz regime. The elementary unit of the array consists of three-stacked gold micro-rings, which are separated from each other by thick SU-8 layer. Here, we present a topological study of a loop Yagi-Uda structure to examine the robustness of the narrow absorption peak against the misalignment among multiple layers and structural disorders. The study reveals that misalignment and variation of geometrical parameters with in the range of experimental errors can still protect the absorption peak with more than 70% absorption.