Design of 3D printed plastic modular filters

The design of 3D printed plastic modular filters is presented in this paper. The proposed principle allows the user to choose at will the order of a bandpass filter by plugging as much blocks (resonators) as needed. The conception and results of a 4-poles filter are discussed. Because of their simplicity, these filters have the potential to be used for microwave practical courses thanks to good performances, quick and easy assembly, easy tuning and maintenance and finally low cost manufacturing.