{"id":"https://openalex.org/W3214732400","doi":"https://doi.org/10.1109/tcsii.2021.3125460","title":"Inline Microwave Filters With <i>N</i> + 1 Transmission Zeros Generated by Frequency-Variant Couplings: Coupling-Matrix-Based Synthesis and Design","display_name":"Inline Microwave Filters With <i>N</i> + 1 Transmission Zeros Generated by Frequency-Variant Couplings: Coupling-Matrix-Based Synthesis and Design","publication_year":2021,"publication_date":"2021-11-04","ids":{"openalex":"https://openalex.org/W3214732400","doi":"https://doi.org/10.1109/tcsii.2021.3125460","mag":"3214732400"},"language":"en","primary_location":{"id":"doi:10.1109/tcsii.2021.3125460","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tcsii.2021.3125460","pdf_url":null,"source":{"id":"https://openalex.org/S93916849","display_name":"IEEE Transactions on Circuits & Systems II Express Briefs","issn_l":"1549-7747","issn":["1549-7747","1558-3791"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319808","host_organization_name":"Institute of Electrical and Electronics Engineers","host_organization_lineage":["https://openalex.org/P4310319808"],"host_organization_lineage_names":["Institute of Electrical and Electronics Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE Transactions on Circuits and Systems II: Express Briefs","raw_type":"journal-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5051913366","display_name":"Martyna Mul","orcid":"https://orcid.org/0000-0002-2167-6793"},"institutions":[{"id":"https://openalex.org/I169333911","display_name":"Gda\u0144sk University of Technology","ror":"https://ror.org/006x4sc24","country_code":"PL","type":"education","lineage":["https://openalex.org/I169333911"]}],"countries":["PL"],"is_corresponding":true,"raw_author_name":"Martyna Mul","raw_affiliation_strings":["Faculty of Electronics, Telecommunications, and Informatics, Gda&#x0144;sk University of Technology, Gdansk, Poland"],"affiliations":[{"raw_affiliation_string":"Faculty of Electronics, Telecommunications, and Informatics, Gda&#x0144;sk University of Technology, Gdansk, Poland","institution_ids":["https://openalex.org/I169333911"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5019976851","display_name":"Maciej Jasi\u0144ski","orcid":"https://orcid.org/0000-0001-5416-6127"},"institutions":[{"id":"https://openalex.org/I169333911","display_name":"Gda\u0144sk University of Technology","ror":"https://ror.org/006x4sc24","country_code":"PL","type":"education","lineage":["https://openalex.org/I169333911"]}],"countries":["PL"],"is_corresponding":false,"raw_author_name":"Maciej Jasinski","raw_affiliation_strings":["Faculty of Electronics, Telecommunications, and Informatics, Gda&#x0144;sk University of Technology, Gdansk, Poland"],"affiliations":[{"raw_affiliation_string":"Faculty of Electronics, Telecommunications, and Informatics, Gda&#x0144;sk University of Technology, Gdansk, Poland","institution_ids":["https://openalex.org/I169333911"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5053746472","display_name":"Adam Lam\u0119cki","orcid":"https://orcid.org/0000-0003-4747-7167"},"institutions":[{"id":"https://openalex.org/I169333911","display_name":"Gda\u0144sk University of Technology","ror":"https://ror.org/006x4sc24","country_code":"PL","type":"education","lineage":["https://openalex.org/I169333911"]}],"countries":["PL"],"is_corresponding":false,"raw_author_name":"Adam Lamecki","raw_affiliation_strings":["Faculty of Electronics, Telecommunications, and Informatics, Gda&#x0144;sk University of Technology, Gdansk, Poland"],"affiliations":[{"raw_affiliation_string":"Faculty of Electronics, Telecommunications, and Informatics, Gda&#x0144;sk University of Technology, Gdansk, Poland","institution_ids":["https://openalex.org/I169333911"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5091307888","display_name":"Roberto G\u00f3mez\u2010Garc\u00eda","orcid":"https://orcid.org/0000-0001-9132-6927"},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Roberto Gomez-Garcia","raw_affiliation_strings":["Department of Signal Theory and Communications, Polytechnic School, University of Alcal&#x00E1;, Alcal&#x00E1; de Henares, Spain"],"affiliations":[{"raw_affiliation_string":"Department of Signal Theory and Communications, Polytechnic School, University of Alcal&#x00E1;, Alcal&#x00E1; de Henares, Spain","institution_ids":[]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5073551397","display_name":"Micha\u0142 Mrozowski","orcid":"https://orcid.org/0000-0002-1110-8717"},"institutions":[{"id":"https://openalex.org/I169333911","display_name":"Gda\u0144sk University of Technology","ror":"https://ror.org/006x4sc24","country_code":"PL","type":"education","lineage":["https://openalex.org/I169333911"]}],"countries":["PL"],"is_corresponding":false,"raw_author_name":"Michal Mrozowski","raw_affiliation_strings":["Faculty of Electronics, Telecommunications, and Informatics, Gda&#x0144;sk University of Technology, Gdansk, Poland"],"affiliations":[{"raw_affiliation_string":"Faculty of Electronics, Telecommunications, and Informatics, Gda&#x0144;sk University of Technology, Gdansk, Poland","institution_ids":["https://openalex.org/I169333911"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":5,"corresponding_author_ids":["https://openalex.org/A5051913366"],"corresponding_institution_ids":["https://openalex.org/I169333911"],"apc_list":null,"apc_paid":null,"fwci":1.9052,"has_fulltext":false,"cited_by_count":22,"citation_normalized_percentile":{"value":0.86177433,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":96,"max":99},"biblio":{"volume":"69","issue":"3","first_page":"824","last_page":"828"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10262","display_name":"Microwave Engineering and Waveguides","score":1.0,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10262","display_name":"Microwave Engineering and Waveguides","score":1.0,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11383","display_name":"Advanced Antenna and Metasurface Technologies","score":0.9958999752998352,"subfield":{"id":"https://openalex.org/subfields/2202","display_name":"Aerospace Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10187","display_name":"Radio Frequency Integrated Circuit Design","score":0.9901999831199646,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/eigenvalues-and-eigenvectors","display_name":"Eigenvalues and eigenvectors","score":0.6251111626625061},{"id":"https://openalex.org/keywords/inverse","display_name":"Inverse","score":0.5885829329490662},{"id":"https://openalex.org/keywords/coupling","display_name":"Coupling (piping)","score":0.5752569437026978},{"id":"https://openalex.org/keywords/matrix","display_name":"Matrix (chemical analysis)","score":0.5559640526771545},{"id":"https://openalex.org/keywords/band-pass-filter","display_name":"Band-pass filter","score":0.46019721031188965},{"id":"https://openalex.org/keywords/microwave","display_name":"Microwave","score":0.45641782879829407},{"id":"https://openalex.org/keywords/topology","display_name":"Topology (electrical circuits)","score":0.40913018584251404},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.3787878155708313},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.3566586673259735},{"id":"https://openalex.org/keywords/applied-mathematics","display_name":"Applied mathematics","score":0.35090672969818115},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.30965107679367065},{"id":"https://openalex.org/keywords/electronic-engineering","display_name":"Electronic engineering","score":0.24239909648895264},{"id":"https://openalex.org/keywords/physics","display_name":"Physics","score":0.2278820276260376},{"id":"https://openalex.org/keywords/combinatorics","display_name":"Combinatorics","score":0.19992280006408691},{"id":"https://openalex.org/keywords/engineering","display_name":"Engineering","score":0.1344040036201477},{"id":"https://openalex.org/keywords/materials-science","display_name":"Materials science","score":0.11921361088752747},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.10820958018302917},{"id":"https://openalex.org/keywords/quantum-mechanics","display_name":"Quantum mechanics","score":0.0804850161075592}],"concepts":[{"id":"https://openalex.org/C158693339","wikidata":"https://www.wikidata.org/wiki/Q190524","display_name":"Eigenvalues and eigenvectors","level":2,"score":0.6251111626625061},{"id":"https://openalex.org/C207467116","wikidata":"https://www.wikidata.org/wiki/Q4385666","display_name":"Inverse","level":2,"score":0.5885829329490662},{"id":"https://openalex.org/C131584629","wikidata":"https://www.wikidata.org/wiki/Q4308705","display_name":"Coupling (piping)","level":2,"score":0.5752569437026978},{"id":"https://openalex.org/C106487976","wikidata":"https://www.wikidata.org/wiki/Q685816","display_name":"Matrix (chemical analysis)","level":2,"score":0.5559640526771545},{"id":"https://openalex.org/C147788027","wikidata":"https://www.wikidata.org/wiki/Q2718101","display_name":"Band-pass filter","level":2,"score":0.46019721031188965},{"id":"https://openalex.org/C44838205","wikidata":"https://www.wikidata.org/wiki/Q127995","display_name":"Microwave","level":2,"score":0.45641782879829407},{"id":"https://openalex.org/C184720557","wikidata":"https://www.wikidata.org/wiki/Q7825049","display_name":"Topology (electrical circuits)","level":2,"score":0.40913018584251404},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.3787878155708313},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.3566586673259735},{"id":"https://openalex.org/C28826006","wikidata":"https://www.wikidata.org/wiki/Q33521","display_name":"Applied mathematics","level":1,"score":0.35090672969818115},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.30965107679367065},{"id":"https://openalex.org/C24326235","wikidata":"https://www.wikidata.org/wiki/Q126095","display_name":"Electronic engineering","level":1,"score":0.24239909648895264},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.2278820276260376},{"id":"https://openalex.org/C114614502","wikidata":"https://www.wikidata.org/wiki/Q76592","display_name":"Combinatorics","level":1,"score":0.19992280006408691},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.1344040036201477},{"id":"https://openalex.org/C192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","level":0,"score":0.11921361088752747},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.10820958018302917},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.0804850161075592},{"id":"https://openalex.org/C2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","level":1,"score":0.0},{"id":"https://openalex.org/C78519656","wikidata":"https://www.wikidata.org/wiki/Q101333","display_name":"Mechanical engineering","level":1,"score":0.0},{"id":"https://openalex.org/C159985019","wikidata":"https://www.wikidata.org/wiki/Q181790","display_name":"Composite material","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/tcsii.2021.3125460","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tcsii.2021.3125460","pdf_url":null,"source":{"id":"https://openalex.org/S93916849","display_name":"IEEE Transactions on Circuits & Systems II Express Briefs","issn_l":"1549-7747","issn":["1549-7747","1558-3791"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319808","host_organization_name":"Institute of Electrical and Electronics Engineers","host_organization_lineage":["https://openalex.org/P4310319808"],"host_organization_lineage_names":["Institute of Electrical and Electronics Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE Transactions on Circuits and Systems II: Express Briefs","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[{"id":"https://openalex.org/G5343996357","display_name":null,"funder_award_id":"UMO-2019/33/B/ST7/00889","funder_id":"https://openalex.org/F4320321042","funder_display_name":"Fundacja na rzecz Nauki Polskiej"}],"funders":[{"id":"https://openalex.org/F4320321042","display_name":"Fundacja na rzecz Nauki Polskiej","ror":"https://ror.org/048zd9m77"}],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":13,"referenced_works":["https://openalex.org/W2003531024","https://openalex.org/W2141356696","https://openalex.org/W2150301427","https://openalex.org/W2159073174","https://openalex.org/W2167569728","https://openalex.org/W2906977232","https://openalex.org/W2970522788","https://openalex.org/W3042717614","https://openalex.org/W3080652414","https://openalex.org/W3136004289","https://openalex.org/W3165018416","https://openalex.org/W3172984034","https://openalex.org/W4240797762"],"related_works":["https://openalex.org/W2140821323","https://openalex.org/W2057179799","https://openalex.org/W2048714372","https://openalex.org/W2316089493","https://openalex.org/W2040036307","https://openalex.org/W2102141309","https://openalex.org/W2996332206","https://openalex.org/W2151675049","https://openalex.org/W1525031759","https://openalex.org/W2357696695"],"abstract_inverted_index":{"A":[0],"general":[1],"coupling-matrix-based":[2,84],"synthesis":[3,46,85,97,123],"methodology":[4],"for":[5],"inline":[6],"<inline-formula":[7,24],"xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"":[8,25],"xmlns:xlink=\"http://www.w3.org/1999/xlink\">":[9,26],"<tex-math":[10,27],"notation=\"LaTeX\">${N}$":[11],"</tex-math></inline-formula>":[12,29],"th-order":[13],"microwave":[14],"bandpass":[15],"filters":[16],"(BPFs)":[17],"with":[18,103],"frequency-variant":[19],"reactive-type":[20],"couplings":[21],"that":[22,56],"generate":[23],"notation=\"LaTeX\">${N+1}$":[28],"transmission":[30],"zeros":[31],"(TZs)":[32],"is":[33,60,75,93,125],"presented":[34],"in":[35],"this":[36,68],"brief.":[37],"The":[38,77],"proposed":[39],"approach":[40],"exploits":[41],"the":[42,45,57,81,120],"formulation":[43],"of":[44,65,80,99,119],"problem":[47],"as":[48,112],"three":[49],"inverse":[50],"nonlinear":[51,72],"eigenvalue":[52],"problems":[53],"(INEVPs)":[54],"so":[55],"coupling":[58],"matrix":[59],"built":[61,126],"from":[62],"their":[63],"sets":[64],"eigenvalues.":[66],"For":[67],"purpose,":[69],"an":[70],"optimization":[71],"least-squares":[73],"procedure":[74],"employed.":[76],"theoretical":[78],"foundations":[79],"engineered":[82],"INEVP":[83],"framework":[86],"are":[87],"described.":[88],"In":[89],"addition,":[90],"its":[91],"effectiveness":[92],"verified":[94],"through":[95],"various":[96],"examples":[98],"a":[100,115],"third-order":[101],"BPF":[102,122],"four":[104],"TZs":[105],"based":[106],"on":[107],"different":[108],"circuit":[109],"models.":[110],"Moreover,":[111],"experimental":[113],"validation,":[114],"2.4-GHz":[116],"microstrip":[117],"prototype":[118],"distributed-element":[121],"example":[124],"and":[127],"measured.":[128]},"counts_by_year":[{"year":2025,"cited_by_count":3},{"year":2024,"cited_by_count":7},{"year":2023,"cited_by_count":8},{"year":2022,"cited_by_count":4}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}