Low Loss Tunable Filters in Substrate Integrated Waveguide

[EN] In this work, the design and experimental results of compact low-loss filters, based on the extension of the classical coaxial waveguide resonator to Substrate Integrated Waveguide technology, are successfully demonstrated. The design, fabrication and measurement of a continuously tunable cavity resonator and a two-pole filter at S-band in single-layer SIW technology are presented. These structures keep the low-cost fabrication scheme of single-layer PCB processing, while requiring less than half the area compared to a conventional SIW design.