Journal
IEEE ACCESS
Volume 10, Issue -, Pages 45241-45255Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/ACCESS.2022.3169774
Keywords
Couplings; Rectangular waveguides; Topology; Filtering theory; Resonator filters; Transversal filters; Transfer functions; Circuit synthesis; coupling matrix; diagonal cross-coupling; distributed parameter circuits; doublets; filters; inductive waveguide filters; quadruplets; space mapping
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Funding
- Ministerio de Ciencia e Innovacion (MICIN) [MICIN/AEI/10.13039/501100011033]
- Spanish Government, through the Research and Development Project [PID2019-103982RB-C41]
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The objective of this paper is to demonstrate the use of inductive quadruplets with diagonal cross-couplings as building blocks for filters in rectangular waveguide. It shows how general transfer functions can be implemented using coupling matrix synthesis and distributed networks. Several filter design examples are provided, and the measured results validate the new filter structures and design procedures.
The objective of this paper is to show how inductive quadruplets with diagonal cross-couplings can be used as building blocks for filters in rectangular waveguide. Starting with the coupling matrix synthesis, we show how very general transfer functions can be easily implemented with a very simple step-by-step procedure. In addition to coupling matrix theory, we also describe distributed networks that can be effectively used to carry out the transition from coupling matrix descriptions to actual waveguide structures. Several filter design examples are also described in detail. Finally, measured results are also discussed showing excellent agreement with simulations, thereby fully validating both the new family of filter structures and the related design procedures.
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