3D-Printed Low-Pass Filter with Conical Inductors for Broadband RF Applications

In this paper we present the preliminary electromagnetic characterization of a 3D-printed low-pass filter for broadband RF applications. The filter consists of two conical 3D inductors and a 3D capacitor, arranged in a third-order Butterworth topology. We designed, fabricated, and tested the prototype filter. The results for insertion loss, cut-off frequency, and bandwidth enhancement, are presented, discussed and correlated with the design and production parameters.