A study on the co-design of on-chip varactor-based Gallium Nitride Microstrip Bandpass Filters
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Date
2025-11-19
Authors
Fontana, Andrés
Psychogiou, Dimitra
Journal Title
Journal ISSN
Volume Title
Publisher
Institute of Electrical and Electronics Engineers Inc.
Published Version
Abstract
A study on the performance of continuously-tunable millimeter-wave varactor-based Monolithic Microwave Integrated Circuit (MMIC) bandpass filters (BPFs) is presented. An experimental characterization of Gallium Nitride on Silicon Carbide (GaN-on-SiC) varactors with different number of fingers and gate widths is carried out to determine their performance from 25 to 45 GHz. These results are used to improve the center frequency tuning range of a 2nd order Chebyshev BPF implemented with quarter-wavelength microstrip coupled resonators, while minimizing the in-band losses. A continuously tunable bandpass filter covering 5G New Radio Frequency Range 2 bands from 25-29.2 GHz, with 1 GHz bandwidth, and total insertion loss 3.4-6.7 dB is demonstrated.
Description
Keywords
Bandpass filter , Frequency tuning , Monolithic microwave integrated circuit , Tunable filter , [TyndallMicroNano] , [EngineeringArchitecture]
Citation
Fontana, A & Psychogiou, D 2025, A study on the co-design of on-chip varactor-based Gallium Nitride Microstrip Bandpass Filters. in 2025 55th European Microwave Conference, EuMC 2025. 2025 55th European Microwave Conference, EuMC 2025, Institute of Electrical and Electronics Engineers Inc., pp. 371-374, 55th European Microwave Conference, EuMC 2025, Utrecht, Netherlands, 23/09/25. https://doi.org/10.23919/EuMC65286.2025.11235207