Reconfigurable and highly-miniaturized low-noise amplifiers based on tunable filtering loads

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dc.contributor.authorFontana, Andrésen
dc.contributor.authorCheng, Steven Matthewen
dc.contributor.authorPsychogiou, Dimitraen
dc.date.accessioned2025-10-14T15:56:45Z
dc.date.available2025-10-14T15:56:45Z
dc.date.issued2025-03-05en
dc.description.abstractThis article reports on new types of reconfigurable and multifunctional low-noise amplifier filters (LNAF) for sub-6 GHz New Radio (NR) S-band applications. The proposed LNAF concepts are based on complex-terminated bandpass filter (BPF)-type output matching networks that facilitate quasi-elliptic transfer functions that can be tuned in terms of bandwidth (BW), center frequency ( fcen ), and can be intrinsically switched-off. To validate the proposed approaches, four proof-of-concept LNAF prototypes were realized by means of static and varactor-loaded microstrip resonators. Further size reduction is introduced in one of the prototypes through a co-designed filtering-based LNAF using tapped line resonators. For practical validation purposes, four alternative prototypes, namely LNAF I-IV, were manufactured and tested. They exhibit the following features: i) LNAF I: passband mode with fcen tuning: 2.64-3.25 GHz, fractional bandwidth (FBW) tuning: 11.9-31.6% (2.65:1), gain: 16.5 dB, noise figure (NF) <0.86 dB, third order output intercept point (OIP3): 10.87 dBm, and an intrinsically switched-off mode with isolation >39 dB; ii) LNAF II: passband mode with fcen tuning: 3.61-3.82 GHz, FBW: 6.3%, gain: 10.2-12.6 dB, NF <0.95 dB, OIP 3>11.15 dB, and an intrinsically switched-off mode with isolation >37.07 dB; iii) LNAF III: passband mode with fcen : 3.99 GHz, FBW: 6.48%, gain: 14.3 dB, NF <1.1 dB, OIP 3>13.2 dB, and footprint reduction of 49% with respect to LNAF II. A 2-stage LNAF prototype, named LNAF IV, is implemented to achieve higher gain of 22.6 dB and NF <1.1 dB at 3.98 GHz with 15% less area than LNAF II.en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationFontana, A., Cheng, S. M. and Psychogiou, D. (2025) 'Reconfigurable and highly-miniaturized low-noise amplifiers based on tunable filtering loads', IEEE Access, 13, pp. 51718-51728. https://doi.org/10.1109/ACCESS.2025.3548311en
dc.identifier.doi10.1109/access.2025.3548311en
dc.identifier.endpage51728en
dc.identifier.issn2169-3536en
dc.identifier.journaltitleIEEE Accessen
dc.identifier.startpage51718en
dc.identifier.urihttps://hdl.handle.net/10468/18038
dc.identifier.volume13en
dc.language.isoenen
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)en
dc.relation.ispartofIEEE Accessen
dc.rights© 2025, the Authors. This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/en
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subjectBandwidth tuningen
dc.subjectCenter frequency tuningen
dc.subjectCo-designen
dc.subjectLow-noise amplifieren
dc.subjectReconfigurable LNAen
dc.subjectFilter LNAen
dc.subjectTunable filteren
dc.titleReconfigurable and highly-miniaturized low-noise amplifiers based on tunable filtering loadsen
dc.typeArticle (peer-reviewed)en
dc.typejournal-articleen
oaire.citation.volume13en
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