Efficient Design of Compact H-plane Rectangular Waveguide Band-Pass Filters with Integrated Coaxial Excitation

Abstract In this work, an efficient procedure for the design of compact H-plane rectangular waveguide band-pass filters including an integrated coaxial excitation is presented. In contrast to classical H-plane filters, where additional input/output boxed cavities are needed to implement the coaxial excitation of the component that usually results in bulky designs, a more compact solution is achieved in this contribution by taking advantage of the resonant behavior of the cited additional cavities. The design strategy, which is based on the well-known Aggressive Space Mapping technique, combines a segmentation of the filter with the use of an equivalent circuit model of the component. The efficiency and accuracy of the proposed approach have been successfully validated with the design of a 7-pole Chebyshev band-pass filter operating in the Ku-band.