{"title":"Harmonic Suppression in In-line Parallel-Coupled Microstrip Bandpass Filter by Minkowski Fractals","authors":"S. Chatterjee, T. K. Das, B. Gupta","doi":"10.1109/MMS.2017.8497142","DOIUrl":null,"url":null,"abstract":"Present paper highlights an in-line third order parallel-coupled microstrip line Chebyshev bandpass filter at 2.5GHz with Minkowski fractals. An in-line configuration provides more than 62% of size reduction compared to conventional coupled-line filter, with a degradation of second harmonic passband. By employing fractals at the edges of each section of the coupled-lines, modal characteristic impedances are modulated to achieve phase velocity compensation, resulting around 42dB suppression of the unwanted second harmonic in the modified in-line structure having 65% of size reduction. Present design with a fractional bandwidth of 15% has been utilized for WLAN application.","PeriodicalId":152707,"journal":{"name":"2017 Mediterranean Microwave Symposium (MMS)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"6","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2017 Mediterranean Microwave Symposium (MMS)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/MMS.2017.8497142","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 6
Abstract
Present paper highlights an in-line third order parallel-coupled microstrip line Chebyshev bandpass filter at 2.5GHz with Minkowski fractals. An in-line configuration provides more than 62% of size reduction compared to conventional coupled-line filter, with a degradation of second harmonic passband. By employing fractals at the edges of each section of the coupled-lines, modal characteristic impedances are modulated to achieve phase velocity compensation, resulting around 42dB suppression of the unwanted second harmonic in the modified in-line structure having 65% of size reduction. Present design with a fractional bandwidth of 15% has been utilized for WLAN application.