Design of iris-coupled broadband waveguide filter using modified reflection-zero frequencies

摘要

In spite of its low loss and superior power handling capability, the waveguide filter cannot have broad band- width due to the strong frequency dependence of the reac- tance values for coupling of the cavity resonators and the guide wavelength. To achieve a broadband design of the iris-coupled waveguide bandpass filter with the Chebyshev function as the transfer function, the susceptance value of the inductive iris is optimized by specifying the ideal zero frequency of the reflection.