Stereolithography Additive Manufacturing of Overmoded Spherical Filters

In this paper, we provide an overview of the stere-olithography (SLA) manufacturing process applied to the design of microwave filters. For that purpose, a spherical cavity that operates with the higher order mode TE 101 has been used in order to design filters oriented for additive manufacturing. T...

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Bibliographic Details
Main Authors: Lopez-Oliver, Enrique, Tomassoni, Cristiano
Format: Conference Proceeding
Language:English
Subjects:
3-D printing
additive manufacturing (AM)
bandpass filter
Frequency measurement
Geometry
Manufacturing
Matched filters
Microwave theory and techniques
Prototypes
stereolithography (SLA)
Three-dimensional printing
transmission zero (TZ)
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Summary:In this paper, we provide an overview of the stere-olithography (SLA) manufacturing process applied to the design of microwave filters. For that purpose, a spherical cavity that operates with the higher order mode TE 101 has been used in order to design filters oriented for additive manufacturing. The characteristics of such mode (high Q-factor and size) makes it an interesting choice for filters manufactured with 3-D printers. For validation purposes, two doublet prototypes with different configurations and mechanical structures have been manufactured with an SLA 3-D printer, metallized, and measured. Results show various discrepancies between the two prototypes: with measurements matching fairly well with the simulations for one prototype, while a certain frequency shift is present for the other one.
ISSN:2157-9830
DOI:10.1109/MMS55062.2022.9825548