Industry Days - Additive Manufacturing for RF/Microwave hardware

Material customization and performance optimisation of bandpass filters made by ceramic additive manufacturing (Xlim CNRS/University of Limoges)

22 Nov 2016, 14:50

25m

NA052 -Erasmus Conference Room (ESA/ESTEC)

Speaker

Dr Nicolas Delhote (Xlim CNRS/University of Limoges)

Description

This presentation will be focused on the application of ceramic additive manufacturing for compact surface mountable bandpass filters and tunable cavity filters. We will specifically target here three sub-topics: - Applied examples from compact to constant absolute bandwidth tunable cavity filters using low loss ceramics. - Topological optimization tools applied to the enhancement of dielectric resonators (unloaded Q factor, spurious free range) - Customization of ceramic permittivity, loss tangent and temperature stability up to 73 GHz.

JUSTIFICATION FOR THE CONSIDERATION

This presentation will be specifically focused on the actual advantages of using 3D ceramic additive manufacturing and a proposition of well-suited filters for space telecommunications.
This includes:
- Benefits of using high permittivity ceramic material for getting compact surface mountable band filters (10 mm x 10 mm x 2 mm for a 4th order filter and Q of 700 in Ku band)
- Application on 3D perturbers shaped to produce constant absolute bandwidth tunable cavity filters in Ku band
- Topology optimization tools dedicated to the optimization of the unloaded Q factor and spurious free range of high Q dielectric resonators
- And a focus on ceramic materials specifically customized for very demanding applications. We will more particularly share here very recent results on the development of super low loss ceramic (2.10-5 at 12 GHz – 2.10-4 at 73 GHz) and temperature stable ceramic while maintaining a very good loss tangent (3 10-4 at 73 GHz). We will show here that custom temperature coefficient of frequency or permittivity can be obtained on demand.