**Acknowledgements**

A. Coves acknowledges grant PID2019-103982RB-C43 funded by Ministerio de Ciencia e Innovación (MCIN)/Agencia Estatal de Investigación (AEI)/10.13039/ 501100011033.

*Novel Filtering Applications in Substrate-Integrated Waveguide Technology DOI: http://dx.doi.org/10.5772/intechopen.105481*
