Co-designed quasi-reflectionless low-noise amplifier with bandpass filter and RF switching functionalities

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dc.contributor.authorCheng, Steven Matthew
dc.contributor.authorFontana, Andres
dc.contributor.authorPsychogiou, Dimitra
dc.contributor.funderTaighde Éireann - Research Ireland
dc.date.accessioned2026-07-10T08:50:02Z
dc.date.available2026-07-10T08:50:02Z
dc.date.issued2026-04-01
dc.description© 2026, 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
dc.description.abstractIn this letter, a reflectionless low-noise amplifier (LNA) filter (RLNAF) is presented, incorporating four distinct functions: 1) filtering; 2) reflection cancellation; 3) low-noise amplification; and 4) RF switching within a single component. It is comprised of a transmissive path and two absorptive paths. Specifically, a complex-termination methodology is applied to the transmissive path incorporating a bandpass filter (BPF) and LNA functionalities, removing the need for additional interstage matching networks (MNs). The absorptive paths are composed of a bandstop filter terminated with a loading resistor in one port to selectively dissipate the out-of-band reflected RF signals. Moreover, switch-off functionality is demonstrated by reconfiguring the bias of the transistor. For proof-of-concept validation purposes, two RLNAF prototypes are designed, manufactured, and measured at C-band. The RF characteristics are given as follows: RLNAF I: fcen=4.65 GHz, gain = 15.8 dB, noise figure (NF) = 2.07 dB, and quasi-reflectionless characteristics better than 10 dB from DC to 4.27 and 4.34 GHz to 6.42 GHz and at least 9.8 dB from 4.27 to 4.34 GHz; RLNAF II: fcen=3.7 GHz, gain = 15.3 dB, NF = 1.09 dB, and quasi-reflectionless characteristics better than 10 dB from DC to 4.75 and 5.75 GHz to 7.03 GHz and at least 6 dB from 4.75 to 5.75 GHz.en
dc.description.sponsorshipResearch Ireand|20/RP/8334
dc.format.extent4
dc.format.extent961010
dc.identifier.authororcidCheng, Steven Matthew
dc.identifier.authororcidFontana, Andres
dc.identifier.authororcidPsychogiou, Dimitra§0000-0003-1936-4026
dc.identifier.citationCheng, S M, Fontana, A & Psychogiou, D 2026, 'Co-designed quasi-reflectionless low-noise amplifier with bandpass filter and RF switching functionalities', IEEE Microwave and Wireless Technology Letters, pp. 1-4. https://doi.org/10.1109/LMWT.2026.3676313
dc.identifier.doi10.1109/LMWT.2026.3676313
dc.identifier.endpage4
dc.identifier.issn2771-957X
dc.identifier.journaltitleIEEE Microwave and Wireless Technology Letters
dc.identifier.otherORCID: /0000-0003-1936-4026/work/216909828
dc.identifier.startpage1
dc.identifier.urihttps://hdl.handle.net/10468/19045
dc.identifier.urlhttps://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=pureucc&SrcAuth=WosAPI&KeyUT=WOS:001732790900001&DestLinkType=FullRecord&DestApp=WOS_CPL
dc.language.isoeng
dc.rightscc_by
dc.subjectAbsorptive filter
dc.subjectActive filters
dc.subjectBand-pass filters
dc.subjectCircuits
dc.subjectFeeds
dc.subjectFiltering
dc.subjectFilters
dc.subjectFrequency modulation
dc.subjectIsolators
dc.subjectNotch filters
dc.subjectRadio broadcasting
dc.subjectbandpass filter (BPF)
dc.subjectBandstop filter
dc.subjectlow-noise amplifier (LNA)
dc.subjectReflectionless filter
dc.subject[EngineeringArchitecture]
dc.subject[Tyndall]
dc.titleCo-designed quasi-reflectionless low-noise amplifier with bandpass filter and RF switching functionalitiesen
dc.typeArticle (Peer reviewed)
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