Ultra-wideband inkjet printed grounded coplanar waveguide-to-folded waveguide transition
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Accepted Version
Date
2026-09-14
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 the design and practical development of an ultra-wideband 3D grounded coplanar waveguide (GCPW)-to-folded waveguide (FWG) transition for beamforming antenna systems in X/Ku-band. It is based on a two-stage configuration comprising a three-dimensional (3D) vertical taper transition and a shielded stripline. A novel integration concept using a two-material piezo drop-on-demand process is proposed for ultra-compact 3D monolithic integration. For proof-of-concept validation purposes, a prototype comprising two transitions in a back-to-back configuration was designed and tested. It exhibited a center frequency of 13.3 GHz, a 10-dB return loss (RL) bandwidth (BW) from 9.08 GHz to 17.54 GHz, (i.e., absolute BW of 8.46 GHz) and a fractional BW (FBW) of 63.61%. In this BW, the in-band insertion loss (IL) was measured between 1.05-3.66 dB.
Description
Keywords
3D printing , Additive manufacturing (AM) , inkjet printing , Monolithic integration , Transition , Waveguide theory , [TyndallMicroNano] , [EngineeringArchitecture]
Citation
Dogan, B & Psychogiou, D 2026, Ultra-wideband inkjet printed grounded coplanar waveguide-to-folded waveguide transition. in 20th European Conference on Antennas and Propagation, EuCAP 2026. 20th European Conference on Antennas and Propagation, EuCAP 2026, Institute of Electrical and Electronics Engineers Inc., pp. 1-5, 20th European Conference on Antennas and Propagation, EuCAP 2026, Dublin, Ireland, 19/04/26. https://doi.org/10.23919/EuCAP68105.2026.11612144