Ku band Metal Strip-Loaded Dielectric Rod Waveguide Filter

The design and implementation of a metal strip-loaded dielectric rod waveguide (MSL DRW) band stop filter is presented for operation in the Ku band. A corrugated metal layer was incorporated on top of a high permittivity waveguide core to achieve band stop rejection greater than 20 dB and rejection bandwidths of 10%. The metal strip loading is achieved with patterned copper foils attached to the top and bottom surfaces of the waveguide structure. It is experimentally demonstrated that the stop band frequencies can be tuned by adjusting the metal strip periodicity. An equivalent circuit model is proposed to represent the filter characteristics.