3-D Printed Directional Couplers in Circular Waveguide

• Published in: IEEE microwave and wireless components letters Vol. 31; no. 6; pp. 561 - 564
• Main Authors: Liu, W., Chen, Z., Viola, T., Huff, G. H.
• Format: Journal Article
• Language: English
• Published: IEEE 01.06.2021
• Subjects: 3-D printing; circular waveguide; Circular waveguides; directional coupler; Directional couplers; electroless silver plating; Microwave circuits; Microwave communication; Microwave filters; Microwave theory and techniques; Plating; stereolithography (SLA)

The design of an additively manufactured circular waveguide 3-dB hybrid directional coupler is proposed and demonstrated. Asymmetric corner radius perturbations at the in-plane orthogonal junction of the four waveguides along with curvilinear inductive posts designed to interact with the TE 11 mode...