Slot arrays on integrated micromachined waveguides

This paper presents an integrated platform with microstrip lines and rectangular waveguides machined on the same substrate. A planar fabrication technique with excellent mechanical tolerances is applied to realize the integrated structure, with the machined waveguide used as feeding line for a slot array. A synthesis procedure is specifically developed to fix the dimension and the positions of the radiating slots. Both numerical and experimental validations are presented on a linear array.