The Corrugated-Waveguide Sand-Pass Filter - A New Type of Waveguide Filter

A new type of waveguide band-pass filter has been realized by combining a corrugated low-pass structure and a high-pass configuration based on the cut-off effect. Low-pass and high-pass functions depend on each other. Therefore after an initial standard synthesis of both functions the overall filter geometry is optimized using an accurate CAD model to obtain the required band-pass response. The filter is especially suited for wide-band applications due to its good far out of band selectivity.