{"id":"https://openalex.org/W2742490538","doi":"https://doi.org/10.1109/tcsii.2017.2738662","title":"A Frequency Tunable Quadrature Coupler With Wide Tuning Range of Center Frequency and Wide Operating Bandwidth","display_name":"A Frequency Tunable Quadrature Coupler With Wide Tuning Range of Center Frequency and Wide Operating Bandwidth","publication_year":2017,"publication_date":"2017-08-11","ids":{"openalex":"https://openalex.org/W2742490538","doi":"https://doi.org/10.1109/tcsii.2017.2738662","mag":"2742490538"},"language":"en","primary_location":{"id":"doi:10.1109/tcsii.2017.2738662","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tcsii.2017.2738662","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/A5012212076","display_name":"Yu Fei Pan","orcid":"https://orcid.org/0000-0001-9924-2111"},"institutions":[{"id":"https://openalex.org/I90610280","display_name":"South China University of Technology","ror":"https://ror.org/0530pts50","country_code":"CN","type":"education","lineage":["https://openalex.org/I90610280"]},{"id":"https://openalex.org/I157773358","display_name":"Sun Yat-sen University","ror":"https://ror.org/0064kty71","country_code":"CN","type":"education","lineage":["https://openalex.org/I157773358"]}],"countries":["CN"],"is_corresponding":true,"raw_author_name":"Yu Fei Pan","raw_affiliation_strings":["School of Electronic and Information Engineering, South China University of Technology, Guangzhou, China","School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou, China"],"affiliations":[{"raw_affiliation_string":"School of Electronic and Information Engineering, South China University of Technology, Guangzhou, China","institution_ids":["https://openalex.org/I90610280"]},{"raw_affiliation_string":"School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou, China","institution_ids":["https://openalex.org/I157773358"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5112466201","display_name":"Shao Yong Zheng","orcid":null},"institutions":[{"id":"https://openalex.org/I157773358","display_name":"Sun Yat-sen University","ror":"https://ror.org/0064kty71","country_code":"CN","type":"education","lineage":["https://openalex.org/I157773358"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Shao Yong Zheng","raw_affiliation_strings":["School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou, China"],"affiliations":[{"raw_affiliation_string":"School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou, China","institution_ids":["https://openalex.org/I157773358"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5113939561","display_name":"Yong Mei Pan","orcid":"https://orcid.org/0000-0003-4935-3934"},"institutions":[{"id":"https://openalex.org/I90610280","display_name":"South China University of Technology","ror":"https://ror.org/0530pts50","country_code":"CN","type":"education","lineage":["https://openalex.org/I90610280"]},{"id":"https://openalex.org/I157773358","display_name":"Sun Yat-sen University","ror":"https://ror.org/0064kty71","country_code":"CN","type":"education","lineage":["https://openalex.org/I157773358"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Yong Mei Pan","raw_affiliation_strings":["School of Electronic and Information Engineering, South China University of Technology, Guangzhou, China","School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou, China"],"affiliations":[{"raw_affiliation_string":"School of Electronic and Information Engineering, South China University of Technology, Guangzhou, China","institution_ids":["https://openalex.org/I90610280"]},{"raw_affiliation_string":"School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou, China","institution_ids":["https://openalex.org/I157773358"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5003913140","display_name":"Yuanxin Li","orcid":"https://orcid.org/0000-0002-3418-5811"},"institutions":[{"id":"https://openalex.org/I157773358","display_name":"Sun Yat-sen University","ror":"https://ror.org/0064kty71","country_code":"CN","type":"education","lineage":["https://openalex.org/I157773358"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Yuan Xin Li","raw_affiliation_strings":["School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou, China"],"affiliations":[{"raw_affiliation_string":"School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou, China","institution_ids":["https://openalex.org/I157773358"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5102395586","display_name":"Yun Liang Long","orcid":null},"institutions":[{"id":"https://openalex.org/I157773358","display_name":"Sun Yat-sen University","ror":"https://ror.org/0064kty71","country_code":"CN","type":"education","lineage":["https://openalex.org/I157773358"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Yun Liang Long","raw_affiliation_strings":["School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou, China"],"affiliations":[{"raw_affiliation_string":"School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou, China","institution_ids":["https://openalex.org/I157773358"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":5,"corresponding_author_ids":["https://openalex.org/A5012212076"],"corresponding_institution_ids":["https://openalex.org/I157773358","https://openalex.org/I90610280"],"apc_list":null,"apc_paid":null,"fwci":1.7629,"has_fulltext":false,"cited_by_count":23,"citation_normalized_percentile":{"value":0.85561465,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":98},"biblio":{"volume":"65","issue":"7","first_page":"864","last_page":"868"},"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":0.9991999864578247,"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/T10069","display_name":"Antenna Design and Analysis","score":0.9979000091552734,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/varicap","display_name":"Varicap","score":0.8289024829864502},{"id":"https://openalex.org/keywords/center-frequency","display_name":"Center frequency","score":0.8161792755126953},{"id":"https://openalex.org/keywords/bandwidth","display_name":"Bandwidth (computing)","score":0.7365597486495972},{"id":"https://openalex.org/keywords/planar","display_name":"Planar","score":0.6313552856445312},{"id":"https://openalex.org/keywords/hybrid-coupler","display_name":"Hybrid coupler","score":0.6304069757461548},{"id":"https://openalex.org/keywords/materials-science","display_name":"Materials science","score":0.4308660924434662},{"id":"https://openalex.org/keywords/amplitude","display_name":"Amplitude","score":0.4282817244529724},{"id":"https://openalex.org/keywords/optics","display_name":"Optics","score":0.4071531593799591},{"id":"https://openalex.org/keywords/optoelectronics","display_name":"Optoelectronics","score":0.3713902235031128},{"id":"https://openalex.org/keywords/physics","display_name":"Physics","score":0.28900569677352905},{"id":"https://openalex.org/keywords/power-dividers-and-directional-couplers","display_name":"Power dividers and directional couplers","score":0.23112070560455322},{"id":"https://openalex.org/keywords/engineering","display_name":"Engineering","score":0.18284818530082703},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.16738206148147583},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.15374323725700378},{"id":"https://openalex.org/keywords/capacitance","display_name":"Capacitance","score":0.12358668446540833},{"id":"https://openalex.org/keywords/band-pass-filter","display_name":"Band-pass filter","score":0.0913672149181366}],"concepts":[{"id":"https://openalex.org/C15485314","wikidata":"https://www.wikidata.org/wiki/Q467463","display_name":"Varicap","level":4,"score":0.8289024829864502},{"id":"https://openalex.org/C7054721","wikidata":"https://www.wikidata.org/wiki/Q1940572","display_name":"Center frequency","level":3,"score":0.8161792755126953},{"id":"https://openalex.org/C2776257435","wikidata":"https://www.wikidata.org/wiki/Q1576430","display_name":"Bandwidth (computing)","level":2,"score":0.7365597486495972},{"id":"https://openalex.org/C134786449","wikidata":"https://www.wikidata.org/wiki/Q3391255","display_name":"Planar","level":2,"score":0.6313552856445312},{"id":"https://openalex.org/C80185135","wikidata":"https://www.wikidata.org/wiki/Q1417986","display_name":"Hybrid coupler","level":3,"score":0.6304069757461548},{"id":"https://openalex.org/C192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","level":0,"score":0.4308660924434662},{"id":"https://openalex.org/C180205008","wikidata":"https://www.wikidata.org/wiki/Q159190","display_name":"Amplitude","level":2,"score":0.4282817244529724},{"id":"https://openalex.org/C120665830","wikidata":"https://www.wikidata.org/wiki/Q14620","display_name":"Optics","level":1,"score":0.4071531593799591},{"id":"https://openalex.org/C49040817","wikidata":"https://www.wikidata.org/wiki/Q193091","display_name":"Optoelectronics","level":1,"score":0.3713902235031128},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.28900569677352905},{"id":"https://openalex.org/C202988678","wikidata":"https://www.wikidata.org/wiki/Q1417986","display_name":"Power dividers and directional couplers","level":2,"score":0.23112070560455322},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.18284818530082703},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.16738206148147583},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.15374323725700378},{"id":"https://openalex.org/C30066665","wikidata":"https://www.wikidata.org/wiki/Q164399","display_name":"Capacitance","level":3,"score":0.12358668446540833},{"id":"https://openalex.org/C147788027","wikidata":"https://www.wikidata.org/wiki/Q2718101","display_name":"Band-pass filter","level":2,"score":0.0913672149181366},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.0},{"id":"https://openalex.org/C121684516","wikidata":"https://www.wikidata.org/wiki/Q7600677","display_name":"Computer graphics (images)","level":1,"score":0.0},{"id":"https://openalex.org/C17525397","wikidata":"https://www.wikidata.org/wiki/Q176140","display_name":"Electrode","level":2,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/tcsii.2017.2738662","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tcsii.2017.2738662","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":[{"display_name":"Affordable and clean energy","score":0.8500000238418579,"id":"https://metadata.un.org/sdg/7"}],"awards":[{"id":"https://openalex.org/G1202135636","display_name":null,"funder_award_id":"2015A030312010","funder_id":"https://openalex.org/F4320321921","funder_display_name":"Natural Science Foundation of Guangdong Province"},{"id":"https://openalex.org/G3438592704","display_name":null,"funder_award_id":"16lgzd04","funder_id":"https://openalex.org/F4320335787","funder_display_name":"Fundamental Research Funds for the Central Universities"},{"id":"https://openalex.org/G8325227159","display_name":null,"funder_award_id":"61401523","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"}],"funders":[{"id":"https://openalex.org/F4320321001","display_name":"National Natural Science Foundation of China","ror":"https://ror.org/01h0zpd94"},{"id":"https://openalex.org/F4320321921","display_name":"Natural Science Foundation of Guangdong Province","ror":null},{"id":"https://openalex.org/F4320335787","display_name":"Fundamental Research Funds for the Central Universities","ror":null}],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":19,"referenced_works":["https://openalex.org/W1511384714","https://openalex.org/W1513140202","https://openalex.org/W1829952735","https://openalex.org/W2023021960","https://openalex.org/W2039351158","https://openalex.org/W2088258348","https://openalex.org/W2091794209","https://openalex.org/W2106849426","https://openalex.org/W2119396996","https://openalex.org/W2125948725","https://openalex.org/W2129103629","https://openalex.org/W2215065819","https://openalex.org/W2327770338","https://openalex.org/W2533834196","https://openalex.org/W2543707799","https://openalex.org/W2557759660","https://openalex.org/W2563035980","https://openalex.org/W2903136240","https://openalex.org/W6630723047"],"related_works":["https://openalex.org/W2346116557","https://openalex.org/W2042297955","https://openalex.org/W2087134326","https://openalex.org/W2143399349","https://openalex.org/W2116836078","https://openalex.org/W2020953827","https://openalex.org/W2990088597","https://openalex.org/W2619048405","https://openalex.org/W2560025493","https://openalex.org/W2010255882"],"abstract_inverted_index":{"To":[0],"solve":[1],"the":[2,36,55,60,68,87],"problems":[3],"of":[4,59,86,103,131],"existing":[5],"frequency":[6,18,51,69,75,85,101],"tunable":[7,19,76],"quadrature":[8,21],"couplers":[9],"with":[10,23],"limited":[11],"tuning":[12,25,70],"range":[13,26,102],"and":[14,27,32,81,126,128],"narrow":[15],"bandwidth,":[16],"a":[17,74,100],"3-dB":[20],"coupler":[22,77,89],"wide":[24,28],"bandwidth":[29,64,112],"is":[30,33,65,78],"proposed":[31],"based":[34],"on":[35],"vertically":[37],"installed":[38],"planar":[39],"(VIP)":[40],"structure.":[41],"Varactor":[42],"diodes":[43],"are":[44],"loaded":[45],"between":[46,119],"vertical":[47],"patches":[48],"to":[49,54,96],"achieve":[50],"tuning.":[52],"Due":[53],"strong":[56],"coupling":[57],"characteristics":[58],"VIP":[61],"structure,":[62],"broad":[63],"maintained":[66],"during":[67],"process.":[71],"For":[72,105],"validation,":[73],"designed,":[79],"fabricated,":[80],"measured.":[82],"The":[83],"center":[84],"designed":[88],"can":[90,133],"be":[91,134],"varied":[92],"from":[93],"1.3":[94],"GHz":[95,98],"2.7":[97],"covering":[99],"70%.":[104],"each":[106],"operating":[107],"mode,":[108],"more":[109],"than":[110],"40%":[111],"defined":[113],"by":[114],"1":[115],"dB":[116,123],"amplitude":[117],"imbalance":[118],"output":[120],"ports,":[121],"10":[122],"return":[124],"loss":[125],"isolation,":[127],"phase":[129],"variation":[130],"5\u00b0,":[132],"achieved.":[135]},"counts_by_year":[{"year":2025,"cited_by_count":1},{"year":2024,"cited_by_count":3},{"year":2023,"cited_by_count":5},{"year":2022,"cited_by_count":1},{"year":2021,"cited_by_count":1},{"year":2020,"cited_by_count":5},{"year":2019,"cited_by_count":3},{"year":2018,"cited_by_count":4}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}
