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Substrate Integrated Waveguide Filters with Stacked Cavities

In this paper the strategy for obtaining substrate integrated waveguide filters for easy manufacturing is illustrated and discussed. The basic idea is to obtain a multilayer filter where just thru-hole vias are used, thus making easier the manufacturing process. This is obtained by designing the filter with identical cavities where evanescent SIW sections are exploited. Furthermore, it is also shown that evanescent cavities can be exploited for the tuning of cavity resonance frequencies.