Ultra-Compact Inkjet-Printed Folded Waveguide Resonator-Based Bandpass Filters
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Accepted Version
Date
2025-11-19
Authors
Dogan, Berkay
Patil, Deepal Deepak
Psychogiou, Dimitra
Journal Title
Journal ISSN
Volume Title
Publisher
Institute of Electrical and Electronics Engineers Inc.
Published Version
Abstract
A concept to develop ultra-compact self-packaged 3D waveguide bandpass filter (BPF) is reported. It is based on inkjet-printed 3D folded-waveguide resonators. Size compactness is achieved using: i) a miniaturized waveguide resonator geometry and ii) monolithic integration by employing a two-material piezo drop-on-demand process. The operating principles of the folded-waveguide resonator concept are presented using eigenmode simulations while taking into consideration the process manufacturing capabilities. The applicability of the folded waveguide resonator concept to highly-miniaturized monolithic BPF is explored through the design and manufacturing of a second-order BPF that exhibits: i) a passband centred at 10.73 GHz with minimum in-band insertion loss (IL) of 2.65 dB and a 3 dB fractional bandwidth (FBW) of 21.6%. Furthermore, it occupies an ultra-compact volume of only 0.34λ0 x 1.26λ0 x 0.16λ0 and only weighs 1.16 g.
Description
Keywords
Additive manufacturing (AM) , Bandpass filter (BPF) , Inkjet printing , Monolithic integration , Multi-material printing , Multi-process printing , Piezo jetting , Waveguide filter , [TyndallMicroNano] , [EngineeringArchitecture]
Citation
Dogan, B., Patil, D.D. and Psychogiou, D. (2025) ‘Ultra-compact inkjet-printed folded waveguide resonator-based bandpass filters’, 2025 55th European Microwave Conference (EuMC). Utrecht, Netherlands: IEEE, pp. 775–778. https://doi.org/10.23919/EuMC65286.2025.11235281