(1) When trying to measure and align a single-mode polymer waveguide, difficulties with machine-vision inspection arise as a result of the limited contrast difference between the waveguide and the bulk material.(2) Will a planar waveguide generate too much loss?(3) In addition to microwave lenses, novel waveguides and other devices are under consideration.(4) Coplanar waveguides having a deep trench between a signal line and a ground plane and methods of their fabrication are disclosed.(5) The microwaves are conducted through copper waveguides to the copper tube of the accelerator.
