3-D-Printed Quasi-Elliptical Evanescent Mode Filter Using Mixed Electromagnetic Coupling

This letter presents an innovative topology of evanescent mode filters with mixed electromagnetic coupling finalized to take full advantage of additive manufacturing techniques. A four-pole filter with two transmission zeroes was designed starting from a suitable equivalent circuit. The filter was built using a 3-D printer and measured. The good experimental results show the usefulness of the solution when in-line topologies are required.

[1]  Eleonora Atzeni,et al.  Overview on Additive Manufacturing Technologies , 2017, Proceedings of the IEEE.

[2]  Qing-Xin Chu,et al.  An Inline Coaxial Quasi-Elliptic Filter With Controllable Mixed Electric and Magnetic Coupling , 2009 .

[3]  Lei Zhu,et al.  Synthesis of Inline Mixed Coupled Quasi-Elliptic Bandpass Filters Based on λ / 4 Resonators , .

[4]  Roberto Sorrentino,et al.  A new class of pseudo-elliptic waveguide filters using resonant posts , 2012, 2012 IEEE/MTT-S International Microwave Symposium Digest.

[5]  Richard V. Snyder,et al.  High power in-line pseudoelliptic evanescent mode filter using series lumped capacitors , 2011, 2011 41st European Microwave Conference.

[6]  R. Sorrentino,et al.  Simple High-Performance Metal-Plating Procedure for Stereolithographically 3-D-Printed Waveguide Components , 2017, IEEE Microwave and Wireless Components Letters.

[7]  Yong Li,et al.  High Selective Microstrip Bandpass Filter and Diplexer With Mixed Electromagnetic Coupling , 2015, IEEE Microwave and Wireless Components Letters.

[8]  Xun Gong,et al.  Laser-Based Layer-by-Layer Polymer Stereolithography for High-Frequency Applications , 2017, Proceedings of the IEEE.

[9]  Q. Chu,et al.  A Compact Open-Loop Filter With Mixed Electric and Magnetic Coupling , 2008, IEEE Transactions on Microwave Theory and Techniques.

[10]  Lei Zhu,et al.  Synthesis of Inline Mixed Coupled Quasi-Elliptic Bandpass Filters Based on $\lambda/4$ Resonators , 2015, IEEE Transactions on Microwave Theory and Techniques.

[11]  R. Sorrentino,et al.  Compact doublet structure for Quasi-elliptical filters using stereolitographic 3D printing , 2017, 2017 47th European Microwave Conference (EuMC).