How to make a wall hanging 'slot'?

slot axis of is oriented at the angle o relative to the longitudinal waveguide axis at the distance xo between the narrow waveguide wall and slot center ( s

A novel low loss E-plane Substrate Integrated Waveguide narrow wall slot antenna is proposed in this paper The antenna operating frequency is centered at

wall mail slot The Mail Slot features an 11 in wide opening and spring-loaded front plate with an interlocking flap for tight closure It can be easily installed as a

wallet slot 888 Double Slot Wall Strip, Slotted Wall Strip, Slotted Strip 40mm Pitch Wall Strip, Shelving Strips, Bracket Strips, Shelf Strips