@inproceedings{9fa2ae1e04dc44e4afb513ea56c516ea,
title = "5.4 GHz acoustic delay lines in lithium niobate thin film with 3 dB insertion loss",
abstract = "In this work, we present the low-loss acoustic delay lines (ADLs) at 5.4 GHz, using the first-order antisymmetric (A1) mode in lithium niobate thin films. The ADLs use a single-phase unidirectional transducer (SPUDT) design with a feature size of the quarter acoustic wavelength. The fabricated miniature A1 ADLs with a feature size of 0.45 μm show a center frequency of 5.4 GHz, a minimum insertion loss (IL) of 3.0 dB, and a fractional bandwidth (FBW) of 1.6% while occupying a footprint of 0.0074 mm2. The simultaneously low IL and high operating frequency significantly surpass the state-of-the-art performance of ADLs. The propagation characteristics of A1 acoustic waves have also been extracted. The demonstrated performance can potentially enable low-loss, high-frequency transversal filter applications for future 5G applications in the sub-6 GHz spectrum bands.",
keywords = "5G mobile communication, Acoustic devices, Delay lines, Microelectromechanical systems, Piezoelectric devices, Thin-film devices, Transversal filters",
author = "Ruochen Lu and Yansong Yang and Steffen Link and Songbin Gong",
note = "Publisher Copyright: {\textcopyright} 2020 IEEE.; 2020 IEEE/MTT-S International Microwave Symposium, IMS 2020 ; Conference date: 04-08-2020 Through 06-08-2020",
year = "2020",
month = aug,
doi = "10.1109/IMS30576.2020.9223789",
language = "English (US)",
series = "IEEE MTT-S International Microwave Symposium Digest",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "245--248",
booktitle = "IMS 2020 - 2020 IEEE/MTT-S International Microwave Symposium",
address = "United States",
}