{"title":"采用四极椭圆响应微带带通滤波器的x波段低相位噪声振荡器","authors":"Jonghoon Choi, Meng-Hung Chen, A. Mortazawi","doi":"10.1109/MWSYM.2007.380564","DOIUrl":null,"url":null,"abstract":"In this paper, a low phase noise planar oscillator employing an elliptic bandpass filter as a frequency stabilization element within its feedback loop is presented. The oscillator phase noise is significantly reduced by taking advantage of the group delay peaks formed at the passband edges of an elliptic filter. An X-band oscillator using a SiGe HBT packaged transistor has been designed and tested. At the oscillation frequency of 9 GHz, the measured phase noise is -140 dBc/Hz at 1 MHz offset frequency. The oscillator exhibits an output power of 3.5 dBm with a figure of merit of -204.4 dBc/Hz.","PeriodicalId":213749,"journal":{"name":"2007 IEEE/MTT-S International Microwave Symposium","volume":"557 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2007-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"29","resultStr":"{\"title\":\"An X-band Low Phase Noise Oscillator Employing a Four-pole Elliptic-Response Microstrip Bandpass Filter\",\"authors\":\"Jonghoon Choi, Meng-Hung Chen, A. Mortazawi\",\"doi\":\"10.1109/MWSYM.2007.380564\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In this paper, a low phase noise planar oscillator employing an elliptic bandpass filter as a frequency stabilization element within its feedback loop is presented. The oscillator phase noise is significantly reduced by taking advantage of the group delay peaks formed at the passband edges of an elliptic filter. An X-band oscillator using a SiGe HBT packaged transistor has been designed and tested. At the oscillation frequency of 9 GHz, the measured phase noise is -140 dBc/Hz at 1 MHz offset frequency. The oscillator exhibits an output power of 3.5 dBm with a figure of merit of -204.4 dBc/Hz.\",\"PeriodicalId\":213749,\"journal\":{\"name\":\"2007 IEEE/MTT-S International Microwave Symposium\",\"volume\":\"557 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2007-06-03\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"29\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2007 IEEE/MTT-S International Microwave Symposium\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/MWSYM.2007.380564\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2007 IEEE/MTT-S International Microwave Symposium","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/MWSYM.2007.380564","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
An X-band Low Phase Noise Oscillator Employing a Four-pole Elliptic-Response Microstrip Bandpass Filter
In this paper, a low phase noise planar oscillator employing an elliptic bandpass filter as a frequency stabilization element within its feedback loop is presented. The oscillator phase noise is significantly reduced by taking advantage of the group delay peaks formed at the passband edges of an elliptic filter. An X-band oscillator using a SiGe HBT packaged transistor has been designed and tested. At the oscillation frequency of 9 GHz, the measured phase noise is -140 dBc/Hz at 1 MHz offset frequency. The oscillator exhibits an output power of 3.5 dBm with a figure of merit of -204.4 dBc/Hz.
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