{"title":"Novel temperature control of a sapphire loaded cavity oscillator from the difference frequency of WGE and WGH modes","authors":"M. Tobar, E. Ivanov, J. Hartnett, C. Locke","doi":"10.1109/FREQ.2001.956366","DOIUrl":null,"url":null,"abstract":"Novel temperature control circuits have been designed to stabilize the temperature of a Sapphire Loaded Cavity (SLC) Whispering Gallery resonator-oscillator and improve its medium-term frequency stability. The temperature control sensor operates from the difference frequency between Whispering Gallery quasi-TE (WGH) and quasi-TM (WGE) modes (dual-mode operation), which have different temperature coefficients of frequency due to the anisotropy of sapphire. The design concept was verified at room temperature at 9 GHz with a SLC resonator capable of supporting two orthogonal modes (the WGE/sub 7,0,0/ and the WGH/sub 9,0,0/) separated by 79 MHz. A discussion of the noise performances of different configurations of dual-mode SLC oscillators is presented.","PeriodicalId":369101,"journal":{"name":"Proceedings of the 2001 IEEE International Frequncy Control Symposium and PDA Exhibition (Cat. No.01CH37218)","volume":"93 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2001-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"9","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of the 2001 IEEE International Frequncy Control Symposium and PDA Exhibition (Cat. No.01CH37218)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/FREQ.2001.956366","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 9
Abstract
Novel temperature control circuits have been designed to stabilize the temperature of a Sapphire Loaded Cavity (SLC) Whispering Gallery resonator-oscillator and improve its medium-term frequency stability. The temperature control sensor operates from the difference frequency between Whispering Gallery quasi-TE (WGH) and quasi-TM (WGE) modes (dual-mode operation), which have different temperature coefficients of frequency due to the anisotropy of sapphire. The design concept was verified at room temperature at 9 GHz with a SLC resonator capable of supporting two orthogonal modes (the WGE/sub 7,0,0/ and the WGH/sub 9,0,0/) separated by 79 MHz. A discussion of the noise performances of different configurations of dual-mode SLC oscillators is presented.
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