A Novel Canonical Triband Substrate Integrated Waveguide Bandpass Filter

A novel cross-coupled triband bandpass filter using Substrate Integrated Waveguide (SIW) has been developed and will be presented in this paper. The filter using a conventional canonical filter arrangement but the cross-coupling strength between nonadjacent resonators was altered to achieve a triband bandpass response filter. A discussion on how by altering the cross-coupling coefficient can result in multiband bandpass response will be reviewed. Simulation and measurement results will be presented to verify this filter concept.