Cavity-stacked filter in CLAF-SIW technology for millimeter waves Segura Gómez, Cleofás Biedma Pérez, Andrés Santiago, David Palomares Caballero, Ángel Arregui, Iván Gómez Laso, Miguel Ángel Padilla De La Torre, Pablo Cavity-stacked filters Chebyshev filter CLAF-SIW technology Electromagnetic bandgap Millimeter waves Planar technologies Funding for open access charge: Universidad de Granada/CBUA This work presents the design of a cavity-stacked bandpass filter (BPF) using contactless air-filled substrate integrated waveguide (CLAF-SIW) technology for millimeter-wave frequencies. This technology is a variant of air-filled SIW technology, incorporating contactless techniques. It enables the reduction of dielectric losses in SIW filters while supporting multilayer structures with robust assembly. The cavity-stacked filter topology allows for very good frequency responses with a reduced footprint and no transitions needed. As an example, a 4th-order Chebyshev bandpass filter composed of four stacked cavities, coupled through irises, is shown. The iris layers are fabricated by metallizing the slot edges of a PCB, while the cavity layers are implemented using CLAF-SIW. The filter has been designed and manufactured to provide a passband response from 36 GHz to 37.5 GHz. A good agreement between measurement and simulation has been achieved. The losses in the proposed CLAF-SIW filter are primarily due to the metal roughness of the low-cost commercial laminates used. 2025-04-23T07:50:34Z 2025-04-23T07:50:34Z 2025-03 journal article https://hdl.handle.net/10481/103746 https://doi.org/10.1016/j.aeue.2025.155725 eng http://creativecommons.org/licenses/by-nc-nd/4.0/ open access Attribution-NonCommercial-NoDerivatives 4.0 Internacional