A novel dual-mode-composite (DMC) cavity resonator is proposed. The DMC cavity is fulfilled based on a rectangular waveguide (RW) cavity by introducing an array of periodic metallic pins into it. Benefiting the introduced periodic metallic pins, the electromagnetic band-gap structures (EBGs) are formed in the DMC cavity and two TE <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">101</inf> -like modes are excited in it. By cascading the DMC cavity resonators, a dual-band filter is designed with three millimeter-wave (mm-wave) band filtering channels and one microwave-band filtering channel.
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Hu et al. (2024) studied this question.
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