Experimental Validation of a Novel Dual-Slot SIW Bandpass Filter for 5G Ka-Band Applications

Fatiha Louakhche; Ahcene Abed; Redha Bendoumia; Ahmed Bouchekhlal

doi:10.5935/jetia.v12i58.3085

Autores/as

Fatiha Louakhche DIC Laboratory, Department of Electronics, Faculty of Technology,University of Blida 1, Blida, Algeria http://orcid.org/0009-0002-6598-930X (no autenticado)
Ahcene Abed Electrical Engineering Laboratory (LGE), Department of Electrical Engineering, Faculty of Technology, University of M'sila, M'sila, Algeria https://orcid.org/0000-0002-5089-794X (no autenticado)
Redha Bendoumia DIC Laboratory, Department of Electronics, Faculty of Technology,University of Blida 1, Blida, Algeria https://orcid.org/0000-0001-7541-0205 (no autenticado)
Ahmed Bouchekhlal Higher School of Signals (HSS), Kolea, Tipaza, Algeria https://orcid.org/0000-0001-5794-6655 (no autenticado)

DOI:

https://doi.org/10.5935/jetia.v12i58.3085

Resumen

This study details the design, optimization, and experimental validation of an innovative dual slot Substrate Integrated Waveguide (SIW) bandpass filter intended for 5G Ka-band applications. The proposed filter is implemented on a cost-effective Rogers RO5880substrate and exhibits a second-order quasi elliptic response achieved by etching a novel transverse dual-slot topology within the SIW cavity. The filter was fabricated using standard PCB procedures. The measured results show strong agreement with simulations, confirming the robustness of the design. The small device measures14.15×27.86 mm² and functions effectively inside the 27-29 GHz range, attaining a fractional bandwidth of 8.81%,a return loss of -42 dB, and an insertion loss of -3.16 dB. These results demonstrate that the proposed dual-slot SIW filter provides a highly selective, miniaturized, and low-cost solution, making it a promising candidate for integration in next-generation 5G millimeter-wave front-end systems.