Design of Three-Dimensional Frequency Selective Structure With Replaceable Unit Structures Using a 3-D Printing Technique

Abstract

In this study, we designed a three-dimensional (3-D) frequency selective surface (FSS) that can be assembled with replaceable unit cells using a 3-D printing technique. The designed 3-D FSS structure consists of an array of cross-dipole structures with a conductive pattern on a square pyramid, and it exhibits frequency blocking at an operating frequency of 6.45 GHz. To verify the performance of the proposed 3-D FSS, a square pyramid-shaped dielectric substrate is manufactured using a 3-D printing technique, and a conductive pattern is implemented using a 3-D printed dispenser method. From the simulated and measurement results, the proposed structure has stable characteristics up to an incident angle of 45° in the polarized TE and TM modes. Using the proposed 3-D FSS structure, unit structures are manufactured in various patterns; thus, they can be assembled easily. Furthermore, by exploiting these characteristics, the reconfiguration characteristics can be realized through structural modifications.