{"title":"Langasite同形物双旋切的测量","authors":"Yoonkee Kim","doi":"10.1109/FREQ.2006.275448","DOIUrl":null,"url":null,"abstract":"In this paper, we report the measured properties of doubly-rotated cuts of bulk-acoustic-wave resonators made of a langasite isomorph material. Test resonators with planoconvex blanks (14 mm diameter, 2 diopter, nominal 10 MHz 5th OT) were fabricated for four different cuts: (thetas = 10deg, phi = 10deg), (thetas = 10deg, phi = 20deg), (thetas = 20deg, phi = 10deg), (thetas = 20deg, phi = 20deg). Using an impedance analyzer, we were able to measure strongly excited fundamental and 3rd overtones of the c- and b-modes, along with their anharmonic modes, as evidenced by their low motional resistances. The a-modes were weakly excited but could also be measured. The theoretical values of eigenmode velocities and piezoelectric coupling coefficients of the doubly-rotated cuts were obtained by solving Christoffel equations. The theoretical values were compared to the measured ones. The frequency-temperature (f-t) characteristics were also measured in the temperature range of -55 degC to 85 degC. The f-t curves of the c- and b-modes showed parabolic characteristics","PeriodicalId":445945,"journal":{"name":"2006 IEEE International Frequency Control Symposium and Exposition","volume":"300 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2006-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":"{\"title\":\"Measurements of Doubly-Rotated-Cuts of Langasite Isomorph\",\"authors\":\"Yoonkee Kim\",\"doi\":\"10.1109/FREQ.2006.275448\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In this paper, we report the measured properties of doubly-rotated cuts of bulk-acoustic-wave resonators made of a langasite isomorph material. Test resonators with planoconvex blanks (14 mm diameter, 2 diopter, nominal 10 MHz 5th OT) were fabricated for four different cuts: (thetas = 10deg, phi = 10deg), (thetas = 10deg, phi = 20deg), (thetas = 20deg, phi = 10deg), (thetas = 20deg, phi = 20deg). Using an impedance analyzer, we were able to measure strongly excited fundamental and 3rd overtones of the c- and b-modes, along with their anharmonic modes, as evidenced by their low motional resistances. The a-modes were weakly excited but could also be measured. The theoretical values of eigenmode velocities and piezoelectric coupling coefficients of the doubly-rotated cuts were obtained by solving Christoffel equations. The theoretical values were compared to the measured ones. The frequency-temperature (f-t) characteristics were also measured in the temperature range of -55 degC to 85 degC. The f-t curves of the c- and b-modes showed parabolic characteristics\",\"PeriodicalId\":445945,\"journal\":{\"name\":\"2006 IEEE International Frequency Control Symposium and Exposition\",\"volume\":\"300 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2006-06-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"2\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2006 IEEE International Frequency Control Symposium and Exposition\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/FREQ.2006.275448\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2006 IEEE International Frequency Control Symposium and Exposition","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/FREQ.2006.275448","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Measurements of Doubly-Rotated-Cuts of Langasite Isomorph
In this paper, we report the measured properties of doubly-rotated cuts of bulk-acoustic-wave resonators made of a langasite isomorph material. Test resonators with planoconvex blanks (14 mm diameter, 2 diopter, nominal 10 MHz 5th OT) were fabricated for four different cuts: (thetas = 10deg, phi = 10deg), (thetas = 10deg, phi = 20deg), (thetas = 20deg, phi = 10deg), (thetas = 20deg, phi = 20deg). Using an impedance analyzer, we were able to measure strongly excited fundamental and 3rd overtones of the c- and b-modes, along with their anharmonic modes, as evidenced by their low motional resistances. The a-modes were weakly excited but could also be measured. The theoretical values of eigenmode velocities and piezoelectric coupling coefficients of the doubly-rotated cuts were obtained by solving Christoffel equations. The theoretical values were compared to the measured ones. The frequency-temperature (f-t) characteristics were also measured in the temperature range of -55 degC to 85 degC. The f-t curves of the c- and b-modes showed parabolic characteristics