A Transition to Non-Radiating Dielectric Waveguide

A transition between standard X-band waveguide and Non-radiating Dielectric (NRD) waveguide is described. It features an impedance taper from air-to- dielectric-filled waveguide cascaded with an impedance taper and mode converter to NRD. In both cases the taper shape and length are obtained through a theoretical calculation. The main property of the transition is a low reflection coefficient so that conventional waveguide equipment tank used for measurements in NRD waveguide.