{"title":"双重净化SAW滤波器","authors":"T. Motsoela, P.M. Smith","doi":"10.1109/ULTSYM.1995.495548","DOIUrl":null,"url":null,"abstract":"The design of a surface acoustic wave filter having two apodized in-line transducers is presented. The positions and weights of the taps in both transducers are obtained simultaneously by considering the finger-by-finger interaction between the two transducers. Two design optimization criteria are compared. A device consisting of two 21-tap transducers with a 10 MHz passband centred at 50 MHz is built on 128/spl deg/ rotated Y-cut LiNbO/sub 3/ to verify the design. We show that the sidelobe suppression is limited by diffraction, which was not included in the design procedure. The response is compared to that obtained by a singly-apodized SAW filter of comparable length designed with the Remez exchange algorithm.","PeriodicalId":268177,"journal":{"name":"1995 IEEE Ultrasonics Symposium. Proceedings. An International Symposium","volume":"25 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1995-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"6","resultStr":"{\"title\":\"Doubly apodized SAW filters\",\"authors\":\"T. Motsoela, P.M. Smith\",\"doi\":\"10.1109/ULTSYM.1995.495548\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The design of a surface acoustic wave filter having two apodized in-line transducers is presented. The positions and weights of the taps in both transducers are obtained simultaneously by considering the finger-by-finger interaction between the two transducers. Two design optimization criteria are compared. A device consisting of two 21-tap transducers with a 10 MHz passband centred at 50 MHz is built on 128/spl deg/ rotated Y-cut LiNbO/sub 3/ to verify the design. We show that the sidelobe suppression is limited by diffraction, which was not included in the design procedure. The response is compared to that obtained by a singly-apodized SAW filter of comparable length designed with the Remez exchange algorithm.\",\"PeriodicalId\":268177,\"journal\":{\"name\":\"1995 IEEE Ultrasonics Symposium. Proceedings. An International Symposium\",\"volume\":\"25 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1995-11-07\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"6\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"1995 IEEE Ultrasonics Symposium. Proceedings. An International Symposium\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/ULTSYM.1995.495548\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"1995 IEEE Ultrasonics Symposium. Proceedings. An International Symposium","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ULTSYM.1995.495548","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
The design of a surface acoustic wave filter having two apodized in-line transducers is presented. The positions and weights of the taps in both transducers are obtained simultaneously by considering the finger-by-finger interaction between the two transducers. Two design optimization criteria are compared. A device consisting of two 21-tap transducers with a 10 MHz passband centred at 50 MHz is built on 128/spl deg/ rotated Y-cut LiNbO/sub 3/ to verify the design. We show that the sidelobe suppression is limited by diffraction, which was not included in the design procedure. The response is compared to that obtained by a singly-apodized SAW filter of comparable length designed with the Remez exchange algorithm.
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