{"title":"Spurious phase modulation by crystal filters","authors":"L. Mallette, K. Ishikawa, J. Varney","doi":"10.1109/AERO.1993.255334","DOIUrl":null,"url":null,"abstract":"A spurious phase modulation (PM) problem discovered during a satellite thermal vacuum test was traced to a supposedly passive component: a crystal filter. While a literature search showed that this phenomenon has been observed in the past, the effect does not seem to be widely known and is a possible problem in some current designs. The PM was noted in a passive four-pole lattice-type crystal bandpass filter at high drive levels over a narrow temperature range. The modulation sidebands were within the 3-dB bandwidth of the filter and 20 dB below the carrier.<<ETX>>","PeriodicalId":136219,"journal":{"name":"1993 IEEE Aerospace Applications Conference Digest","volume":"34 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1993-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"1993 IEEE Aerospace Applications Conference Digest","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/AERO.1993.255334","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
A spurious phase modulation (PM) problem discovered during a satellite thermal vacuum test was traced to a supposedly passive component: a crystal filter. While a literature search showed that this phenomenon has been observed in the past, the effect does not seem to be widely known and is a possible problem in some current designs. The PM was noted in a passive four-pole lattice-type crystal bandpass filter at high drive levels over a narrow temperature range. The modulation sidebands were within the 3-dB bandwidth of the filter and 20 dB below the carrier.<>
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