Horn antenna designed by kodera2t (https://www.thingiverse.com/thing:87574) was used in this project. Dimensions of the designed structure were checked using Blender. Then, the STL file was imported into Openscad program and corrugated structures were created. Thus, the designed structure was printed using the Lulzbot mini printer with PLA material. Corrugated shape of the horn improves the radiation performance of the horn antenna.