Innovative materials and fabrication process to develop new RF components and concepts

Robust Calculation of the Modes in Parabolic Cylinder Metallic Waveguides by Means of a Root-Finding Method for Bivariate Functions

“…In our problem the modal classification presented in Section II-B makes it more convenient to resort to even or odd functions according to ( 14)- (15). A possible definition in terms of even and odd solutions, from which f e (h), f o (h), g e (t) and g o (t) can be extracted, is found in [8].…”

“…On the one hand, recent advances in the manufacturing processes allow nowadays to face complex geometries. Novel techniques such as electroforming, additive manufacturing or 3D printing give rise to new possibilities of design [15], [16]. The manufacturing of the parabolic cylinder waveguide was cumbersome a few decades ago, but currently it would not represent a huge challenge.…”

3D Compact High-Q Filter Made of High-Permittivity Ceramic

“…Substrate integrated waveguides (SIW), fabricated using multilayer or 3D technologies [8]- [10], represent an alternative solution, allowing an interesting compromise between miniaturisation and performance. In this case, the compromise is essentially driven by the material characteristics, in particular its relative permittivity and loss tangent.…”