GaAs filter/isolator using transmission-zero-generating unilateral frequency-selective stages

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dc.contributor.authorLi, Kexin
dc.contributor.authorPsychogiou, Dimitra
dc.contributor.funderTaighde Éireann - Research Ireland, 20/RP/8334
dc.date.accessioned2026-04-30T12:50:01Z
dc.date.available2026-04-30T12:50:01Z
dc.date.issued2026-03-10
dc.description.abstractA Ku-band GaAs monolithic microwave integrated circuit (MMIC) RF component that co-integrates the function of a quasi-elliptic bandpass filter and an RF isolator (BPFI) is reported. It is based on cascaded unilateral frequency-selective stages (UFSs) comprising a transistor-based path and multi-resonant feedback that introduces one pole and two transmission zeros (TZs). A coupled-resonator-based synthesis methodology is developed, extending conventional reciprocal filter synthesis to scalable UFS-based non-reciprocal filters. For experimental validation, a two-stage BPFI was manufactured using a 0.15-μm GaAs process. The prototype exhibits a quasi-elliptic response with center frequency of 15.9 GHz, a 3-dB fractional bandwidth of 20%, 60 dB directivity, and wide upper stopband shaped by four TZs and with greater than 20 dB rejection between DC to 12.4 GHz and 20.1 to 48.3 GHz (measured up to 38 GHz; simulated thereafter).en
dc.description.sponsorshipThis work was supported by Research Ireland under grant 20/RP/8334.
dc.description.versionAccepted Version
dc.format.extent3
dc.format.mimetypeapplication/pdfen
dc.identifier.authororcidLi, Kexin
dc.identifier.authororcidPsychogiou, Dimitra§0000-0003-1936-4026
dc.identifier.citationLi, K & Psychogiou, D 2026, GaAs filter/isolator using transmission-zero-generating unilateral frequency-selective stages. in IMFW 2026 - IEEE MTT-S International Microwave Filter Workshop. IMFW 2026 - IEEE MTT-S International Microwave Filter Workshop, Institute of Electrical and Electronics Engineers Inc., pp. 1-3, 2026 IEEE MTT-S International Microwave Filter Workshop, IMFW 2026, Hong Kong, Hong Kong, 7/02/26. https://doi.org/10.1109/IMFW64610.2026.11419052
dc.identifier.doi10.1109/IMFW64610.2026.11419052
dc.identifier.endpage3
dc.identifier.isbn979-8-3315-5045-5
dc.identifier.isbn9798331550448
dc.identifier.otherORCID: /0000-0003-1936-4026/work/213415649
dc.identifier.startpage1
dc.identifier.urihttps://hdl.handle.net/10468/18715
dc.language.isoen
dc.publisherInstitute of Electrical and Electronics Engineers Inc.
dc.relation.ispartofseriesIMFW 2026 - IEEE MTT-S International Microwave Filter Workshop
dc.relation.urihttps://www.scopus.com/pages/publications/105035984652
dc.rights© 2026, IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
dc.rights.accessrightsopen access
dc.statusPeer reviewed
dc.subjectIsolator
dc.subjectMonolithic microwave integrated circuit (MMIC)
dc.subjectNon-reciprocal filter
dc.subjectQuasi-elliptic filter
dc.subjectRF co-design
dc.subject[EngineeringArchitecture]
dc.subject[TyndallMicroNano]
dc.titleGaAs filter/isolator using transmission-zero-generating unilateral frequency-selective stagesen
dc.typeConference item
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