In this waveguide horn antenn component, a slanted through-slot must be cut using Wire-EDM.
However, the original waveguide port extension was too long, and the EDM wire would directly intersect the port wall, causing severe structural damage and RF degradation.

The WR2.8 twist waveguide operates in the 220–325 GHz band.With an internal cross-section of only 0.71 × 0.355 mm, WR2.8 belongs to the Millimeter wave regime where every micron matters. At these frequencies, even a slight geometric deviation—such as a few microns in cavity size or a fractional-degree twist-angle error—will immediately degrade: Insertion Loss Return

The components shown here are 316L stainless steel micro spring–needle assemblies designed for medical devices that interact directly with biological tissue.