Search Results for author: Sinwoo Cho

Found 8 papers, 0 papers with code

C-Band Lithium Niobate on Silicon Carbide SAW Resonator with Figure-of-Merit of 124 at 6.5 GHz

no code implementations26 Feb 2024 Tzu-Hsuan Hsu, Joshua Campbell, Jack Kramer, Sinwoo Cho, Ming-Huang Li, Ruochen Lu

In this work, we demonstrate a C-band shear-horizontal surface acoustic wave (SH-SAW) resonator with high electromechanical coupling (keff2) of 22% and a quality factor (Q) of 565 based on a thin-film lithium niobate (LN) on silicon carbide (SiC) platform, featuring an excellent figure-of-merit (FoM = keff2*Q ) of 124 at 6. 5 GHz, the highest FoM reported in this frequency range.

Thin-film Lithium Niobate on Insulator Surface Acoustic Wave Devices for 6G Centimeter Bands

no code implementations18 Feb 2024 Tzu-Hsuan Hsu, Joshua Campbell, Jack Kramer, Sinwoo Cho, Zhi-Qiang Lee, Ming-Huang Li, Ruochen Lu

The optimized LNOI SH-SAW with a {\lambda} of 400 nm exhibits a fs of 9. 05 GHz, a keff2 of 15%, Qmax of 213 and a FoM of 32, which indicates a successful implementation for device targeting centimeter bands.

Millimeter Wave Thin-Film Bulk Acoustic Resonator in Sputtered Scandium Aluminum Nitride Using Platinum Electrodes

no code implementations22 Nov 2023 Sinwoo Cho, Omar Barrera, Pietro Simeoni, Ellie Y. Wang, Jack Kramer, Vakhtang Chulukhadze, Joshua Campbell, Matteo Rinaldi, Ruochen Lu

This work describes sputtered scandium aluminum nitride (ScAlN) thin-film bulk acoustic resonators (FBAR) at millimeter wave (mmWave) with high quality factor (Q) using platinum (Pt) electrodes.

Transferred Thin Film Lithium Niobate as Millimeter Wave Acoustic Filter Platforms

no code implementations21 Nov 2023 Omar Barrera, Sinwoo Cho, Kenny Hyunh, Jack Kramer, Michael Liao, Vakhtang Chulukhadze, Lezli Matto, Mark S. Goorsky, Ruochen Lu

This paper reports the first high-performance acoustic filters toward millimeter wave (mmWave) bands using transferred single-crystal thin film lithium niobate (LiNbO3).

38.7 GHz Thin Film Lithium Niobate Acoustic Filter

no code implementations9 Nov 2023 Omar Barrera, Sinwoo Cho, Jack Kramer, Vakhtang Chulukhadze, Joshua Campbell, Ruochen Lu

In this work, a 38. 7 GHz acoustic wave ladder filter exhibiting insertion loss (IL) of 5. 63 dB and 3-dB fractional bandwidth (FBW) of 17. 6% is demonstrated, pushing the frequency limits of thin-film piezoelectric acoustic filter technology.

Thin-Film Lithium Niobate Acoustic Resonator with High Q of 237 and k2 of 5.1% at 50.74 GHz

no code implementations11 Jul 2023 Jack Kramer, Vakhtang Chulukhadze, Kenny Huynh, Omar Barrera, Michael Liao, Sinwoo Cho, Lezli Matto, Mark S. Goorsky, Ruochen Lu

This work reports a 50. 74 GHz lithium niobate (LiNbO3) acoustic resonator with a high quality factor (Q) of 237 and an electromechanical coupling (k2) of 5. 17% resulting in a figure of merit (FoM, Q x k2) of 12. 2.

Thin-Film Lithium Niobate Acoustic Filter at 23.5 GHz with 2.38 dB IL and 18.2% FBW

no code implementations10 Jul 2023 Omar Barrera, Sinwoo Cho, Lezli Matto, Jack Kramer, Kenny Huynh, Vakhtang Chulukhadze, Yen-Wei Chang, Mark S. Goorsky, Ruochen Lu

This work reports an acoustic filter at 23. 5 GHz with a low insertion loss (IL) of 2. 38 dB and a 3-dB fractional bandwidth (FBW) of 18. 2%, significantly surpassing the state-of-the-art.

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