{"title":"Wideband three-transducer SAW filters using unidirectional IDTs on U-shaped MSCs with insertion loss of 1 dB","authors":"S. Doberstein, V. Malyukhov, V. Razgonyaev","doi":"10.1109/ULTSYM.1999.849352","DOIUrl":null,"url":null,"abstract":"This paper presents wideband three-transducer SAW filters using unidirectional IDTs on U-shaped MSCs. In the filters a self-matching effect is used when a static capacitance of an IDT is compensated by an acoustic radiation susceptance. 30-70 MHz filters on 128° YX, 64° YX, 41° YX LiNbO3 have shown an insertion loss of 1 dB, 3-dB fractional bandwidth of 3.5-10% with low ripple of 0.1 dB, stopband attenuation of 10-15 dB. 165, 169 MHz SAW filters for the front-end stages of mobile transceivers have shown an insertion loss of 1-1.8 dB, 3-dB bandwidth of 5.7-11 MHz with a ripple of 0.2 dB, stopband attenuation of 12-40 dB. The filters did not require matching networks, were mounted in the SMD packages (5×5×1.8 mm).","PeriodicalId":339424,"journal":{"name":"1999 IEEE Ultrasonics Symposium. Proceedings. International Symposium (Cat. No.99CH37027)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1999-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"1999 IEEE Ultrasonics Symposium. Proceedings. International Symposium (Cat. No.99CH37027)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ULTSYM.1999.849352","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
This paper presents wideband three-transducer SAW filters using unidirectional IDTs on U-shaped MSCs. In the filters a self-matching effect is used when a static capacitance of an IDT is compensated by an acoustic radiation susceptance. 30-70 MHz filters on 128° YX, 64° YX, 41° YX LiNbO3 have shown an insertion loss of 1 dB, 3-dB fractional bandwidth of 3.5-10% with low ripple of 0.1 dB, stopband attenuation of 10-15 dB. 165, 169 MHz SAW filters for the front-end stages of mobile transceivers have shown an insertion loss of 1-1.8 dB, 3-dB bandwidth of 5.7-11 MHz with a ripple of 0.2 dB, stopband attenuation of 12-40 dB. The filters did not require matching networks, were mounted in the SMD packages (5×5×1.8 mm).
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