Continuously tunable Ku-band GaAs bandstop filter with reconfigurable all-pass capabilities
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Date
2025-06-26
Authors
Fontana, Andrés
Psychogiou, Dimitra
Journal Title
Journal ISSN
Volume Title
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Published Version
Abstract
A multiconfigurable monolithic microwave integrated circuit (MMIC) filter is reported. It exhibits three modes of operation, namely, a high-attenuation single-notch bandstop (BS) mode, a dual-notch BS mode, and an all-pass (AP) mode. It is based on a bridged-T network (BTN) using a minimum number of lumped elements and a signal cancellation technique to counteract the effect of the low on-chip quality factor. Transfer function tuning and bandstop-to-all-pass filter (BSF-to-AP) mode reconfigurability are readily obtained by tuning the frequency of two resonators. A prototype was manufactured using a pHEMT GaAs MMIC process exhibiting a BS mode with frequency tuning range ( Δf0 ) of 16% and suppression up to 68.5 dB, a dual-notch BS mode with Δf0 of 15% and 20% fractional bandwidth (FBW), and an AP mode with insertion loss <5.3 dB.
Description
Keywords
Bandstop filter (BSF) , Monolithic microwave integrated circuit (MMIC) , Multifunction device , Tunable filter
Citation
Fontana, A. and Psychogiou, D. (2025) 'Continuously tunable Ku-band GaAs bandstop filter with reconfigurable all-pass capabilities', IEEE Microwave and Wireless Technology Letters, 35(9), pp. 1284-1287. https://doi.org/10.1109/LMWT.2025.3580893