Monolithically-integrated nested ridge waveguide dual-channel filters
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Accepted Version
Date
2025-11-19
Authors
Dogan, Berkay
Psychogiou, Dimitra
Journal Title
Journal ISSN
Volume Title
Publisher
Institute of Electrical and Electronics Engineers Inc.
Published Version
Abstract
This paper presents a novel highly-miniaturized dual-channel 3D filter design concept. It is based on a new nested waveguide resonator approach that allows the excitation of two fully-isolated fundamental resonances within the volume of a conventional ridge waveguide. Size compactness is achieved by: i) re-using traditionally unused areas of a ridge waveguide and ii) monolithic integration enabled by stereolithography apparatus 3D printing. A novel ridge-waveguide/waveguide (RW-WG) resonator concept is proposed and analysed in detail for the realization of two-channel filters. For proof-of-concept validation purposes, a dual-channel RW-WG-based bandpass filter (BPF) was designed, manufactured and tested. It exhibits a second order low frequency filtering channel at 6.77 GHz with minimum in-band insertion loss (IL) of 0.16 dB (Qeff of 1,060) and 3 dB fractional bandwidth (FBW) of 7%, and a second order highfrequency filtering channel at 15.39 GHz with minimum IL of 0.2 dB Qeff of 1,365) and 3 dB FBW of 5.3%.
Description
Keywords
3D printing , Additive manufacturing (AM) , Bandpass filter , Dual-channel filter , Monolithic integration , Ridge waveguide , Stereolithography apparatus (SLA) , [TyndallMicroNano] , [EngineeringArchitecture]
Citation
Dogan, B. and Psychogiou, D. (2025) ‘Monolithically-integrated nested ridge waveguide dual-channel filters’, 2025 55th European Microwave Conference (EuMC). Utrecht, Netherlands: IEEE, pp. 857–860. https://doi.org/10.23919/EuMC65286.2025.11235292.