Path Filters: A Class of True Inline Topologies With Transmission Zeros

In this article, we present a comprehensive discussion of new class inline microwave filters with transmission zeros in the response, namely, path filters. The main features are highlighted, and an original (synthesis-based) design approach is presented, relying on derivation suitable characteristic polynomials. addition to classical generalized Chebyshev characteristic, two characteristics introduced (namely, bounded reduced Chebyshev), which allows improving flexibility requirements assignment A method for synthesis low-pass prototype also introduced, overcomes limitation based manipulation transversal (whose may fail case filters). Finally, proposed designing considered has been validated by several examples that include evaluation polynomials, synthesis, dimensioning physical structures waveguide technology.