Speaker
Dr
Cristiano Tomassoni
(University of Perugia)
Description
In this presentation, the possibility of locally modifying the effective dielectric permittivity by changing the infill factor of the printing process is exploited and demonstrated by using the fused deposition modeling (FDM) technology. This allows adopting a single filament material to obtain different permittivity values in the various portions of a microwave component. Moreover, the variation of the infill factor allows reducing the dielectric loss tangent of the material: this permits decreasing losses even by using the same material. These features are illustrated through the design and experimental verification of two SIW filters, with identical frequency response but fabricated with different infill factor of the printing process, via FDM.
JUSTIFICATION FOR THE CONSIDERATION
One of the most important feature of 3D printing is the fact that components can be manufactured in a single block. The possibility to obtain different dielectric permittivity values by using the same filament can be exploited in many components where different dielectric profiles are required, as an example: matching sections, lenses, filters and so on. The local control of loss tangent is also an interesting possibility that can be exploited to reduce losses or for obtaining more sophisticated components requiring a controlled distribution of losses (e.g. predistorted filters).
Primary author
Dr
Cristiano Tomassoni
(University of Perugia)
Co-authors
Prof.
Luca Perregrini
(University of Pavia)
Prof.
Manos Tentzeris
(Georgia Tech)
Prof.
Maurizio Bozzi
(University of Pavia)
Prof.
Roberto Sorrentino
(University of Perugia)
Mr
Ryan Bahr
(georgia tech)
