{"title":"Single Ended and Differential Passive RF Impedance Tuners for 2.4 GHz ISM Band Applications","authors":"Ram Krishna, Abhishek Kumar, S. Aniruddhan","doi":"10.1109/MWSCAS.2019.8884805","DOIUrl":null,"url":null,"abstract":"This paper presents the design of two electronically tunable passive RF impedance tuners operating between 2.4 GHz and 2.5 GHz. Theoretical analysis and simulation were performed on two pi matching networks in cascade which helped in increasing the load voltage standing wave ratio (VSWR) coverage. The linearity of the optimized single ended matching network was improved by converting it into a differential structure. Both the impedance tuners based on this theory were fabricated on a two layered FR4 PCB. The fabricated single ended tuner was tested for load impedance variation up to VSWR ≤ 9.5 wherein insertion loss stayed between 0.4 dB and 5.1 dB. The differential network was tested for load impedances up to VSWR ≤ 6 wherein an insertion loss between 0.6 dB and 6.1 dB was obtained. The measured IIP3 of the differential and single ended networks were 37.4 dBm and 34.2 dBm respectively.","PeriodicalId":287815,"journal":{"name":"2019 IEEE 62nd International Midwest Symposium on Circuits and Systems (MWSCAS)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2019 IEEE 62nd International Midwest Symposium on Circuits and Systems (MWSCAS)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/MWSCAS.2019.8884805","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 2
Abstract
This paper presents the design of two electronically tunable passive RF impedance tuners operating between 2.4 GHz and 2.5 GHz. Theoretical analysis and simulation were performed on two pi matching networks in cascade which helped in increasing the load voltage standing wave ratio (VSWR) coverage. The linearity of the optimized single ended matching network was improved by converting it into a differential structure. Both the impedance tuners based on this theory were fabricated on a two layered FR4 PCB. The fabricated single ended tuner was tested for load impedance variation up to VSWR ≤ 9.5 wherein insertion loss stayed between 0.4 dB and 5.1 dB. The differential network was tested for load impedances up to VSWR ≤ 6 wherein an insertion loss between 0.6 dB and 6.1 dB was obtained. The measured IIP3 of the differential and single ended networks were 37.4 dBm and 34.2 dBm respectively.
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