Additive manufacturing of a 4th-order K-band semi-planar slow-wave filter

Abstract

This paper presents the exploitation of the additive manufacturing (AM) technique laser powder bed fusion (L-PBF), for the fabrication of a K-band meta-substrate filter. The decisions made through each round of prototyping are discussed. It also presents the crucial parameters that can lead to a higher quality end product of AM. The filter response and out-of-band performance are also discussed in short.

Metasurfaces for Filter Miniaturization and Out-of-Band Rejection Improvement

“…In the effort to reduce the presence of spurious modes-which can often become too close to the passband-studies on the improvement of filter's out-of-band rejection by works such as [5], [6], [7], [8], and [9] provide effective solutions to suppress spurious modes. However, a method to achieve a well-balanced tradeoff, while effectively miniaturizing a given structure, is the use of metasurfaces inside the resonators [10], [11]. This method has been shown to achieve a miniaturization factor of up to 60% [10], [11].…”

“…However, a method to achieve a well-balanced tradeoff, while effectively miniaturizing a given structure, is the use of metasurfaces inside the resonators [10], [11]. This method has been shown to achieve a miniaturization factor of up to 60% [10], [11]. Metasurfaces are a branch of metamaterials, which focus on the properties and applications of 2-D periodic structures in a propagation medium [12].…”