@inproceedings{eba4fc8643924a85abc89dbd6aedafb0,
title = "Low-Loss and High Power Handling Acoustic Delay Lines Using Thin-Film Lithium Niobate on Sapphire",
abstract = "In this work, we present the first group of GHz low-loss, wideband, and high power handling delay lines (ADLs) using a thin-film lithium niobate (LiNbO3) on sapphire platform. The ADLs leverage a single-phase unidirectional transducer (SPUDT) to efficiently excite the shear horizontal surface acoustic wave (SH-SAW) in the film stack. The fabricated miniature SH-SAW ADL at 1.1 GHz shows a low insertion loss (IL) of 2.8 dB, a wide fractional bandwidth (FBW) of 6.14%, and a fast phase velocity of 5127 m/s. The device also features a high 1 dB compression point (P1dB) of 30.4 dBm. The propagation characteristics of SH-SAW are extracted, with a group velocity of 4747 m/s and a propagation loss of 6.73 dB/mm. The simultaneously low-loss and high power handling illustrate the great potential of LiNbO3-on-sapphire for RF and cross-domain applications at GHz.",
keywords = "Acoustic devices, SH-SAW, delay lines, lithium niobate, microelectromechanical systems, piezoelectric devices, transversal filters",
author = "Ruochen Lu and Yansong Yang and Hassanien, {Ahmed E.} and Songbin Gong",
note = "Publisher Copyright: {\textcopyright} 2021 IEEE.; 2021 IEEE MTT-S International Microwave Symposium, IMS 2021 ; Conference date: 07-06-2021 Through 25-06-2021",
year = "2021",
month = jun,
day = "7",
doi = "10.1109/IMS19712.2021.9574829",
language = "English (US)",
series = "IEEE MTT-S International Microwave Symposium Digest",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "270--273",
booktitle = "2021 IEEE MTT-S International Microwave Symposium, IMS 2021",
address = "United States",
}