W. Wang, H. B. Teng, F. Wang, Y. C. Zhou, Y. Zhang, J. Yuan
{"title":"2.5 GHz Low-Loss and Wideband Surface Acoustic Wave Filter Based on AL/128°YX-LiNbO3","authors":"W. Wang, H. B. Teng, F. Wang, Y. C. Zhou, Y. Zhang, J. Yuan","doi":"10.1134/S1063771023600122","DOIUrl":null,"url":null,"abstract":"<p>A 128°YX-LiNbO<sub>3</sub>-based low-insertion-loss and high-frequency surface acoustic wave (SAW) filter was proposed using COMSOL Multiphysics. The spurious response was suppressed by changing the electrode thickness, reflector period, and reflector structure, after optimization. First, the thickness of the electrode was increased to concentrate the SAW energy on the surface of the piezoelectric material to reduce the propagation loss. Next, an interdigital transducer (IDT) reflector was designed to reduce the insertion loss caused by the spurious response and combined with the optimization of the reflector period. Finally, using this reflector structure when the thickness of the electrode was 0.4 μm, a SAW filter with a center frequency of 2520.5 MHz was designed. The results of the finite element method (FEM) revealed that the insertion loss at the center frequency was –0.1356 dB, the out-band suppression was greater than 30 dB, and the –3 dB bandwidth was greater than 97 MHz<i>.</i></p>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":"69 4","pages":"517 - 524"},"PeriodicalIF":0.9000,"publicationDate":"2023-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Acoustical Physics","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1134/S1063771023600122","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ACOUSTICS","Score":null,"Total":0}
引用次数: 0
Abstract
A 128°YX-LiNbO3-based low-insertion-loss and high-frequency surface acoustic wave (SAW) filter was proposed using COMSOL Multiphysics. The spurious response was suppressed by changing the electrode thickness, reflector period, and reflector structure, after optimization. First, the thickness of the electrode was increased to concentrate the SAW energy on the surface of the piezoelectric material to reduce the propagation loss. Next, an interdigital transducer (IDT) reflector was designed to reduce the insertion loss caused by the spurious response and combined with the optimization of the reflector period. Finally, using this reflector structure when the thickness of the electrode was 0.4 μm, a SAW filter with a center frequency of 2520.5 MHz was designed. The results of the finite element method (FEM) revealed that the insertion loss at the center frequency was –0.1356 dB, the out-band suppression was greater than 30 dB, and the –3 dB bandwidth was greater than 97 MHz.
期刊介绍：
Acoustical Physics is an international peer reviewed journal published with the participation of the Russian Academy of Sciences. It covers theoretical and experimental aspects of basic and applied acoustics: classical problems of linear acoustics and wave theory; nonlinear acoustics; physical acoustics; ocean acoustics and hydroacoustics; atmospheric and aeroacoustics; acoustics of structurally inhomogeneous solids; geological acoustics; acoustical ecology, noise and vibration; chamber acoustics, musical acoustics; acoustic signals processing, computer simulations; acoustics of living systems, biomedical acoustics; physical principles of engineering acoustics. The journal publishes critical reviews, original articles, short communications, and letters to the editor. It covers theoretical and experimental aspects of basic and applied acoustics. The journal welcomes manuscripts from all countries in the English or Russian language.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
