<inline-formula> <tex-math notation="LaTeX">$H$ </tex-math> </inline-formula>-Plane Narrow-Wall Double-Ridge Waveguide Coupler in <inline-formula> <tex-math notation="LaTeX">$V$ </tex-math> </inline-formula>- and <inline-formula> <tex-math notation="LaTeX">$W$ </tex-math> </inline-formula>-Bands

Abstract

A design of a double-ridge waveguide narrow-wall multiple-aperture coupler suitable for conventional machining is demonstrated. Different options for coupling levels up to 3 dB, all working over V-band (45–75 GHz) and W-band (75–110 GHz), are given. The narrow-wall coupler is designed in a custom-made transmission line, double-ridge waveguide, denoted by WRD45110. To experimentally validate the proposed design method and the performance of a selected component, a 15 ± 3 dB narrow-wall coupler is fabricated using computer numerical control machining in three individual pieces; the top section, the middle wall, and the bottom section. Two different H-plane cut assembly techniques utilizing male–female parts and pin walls are examined. The obtained results show a good agreement between simulations and measurements for both methods, therefore proving these components are now feasible.