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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| US | 2025-02-19 09:45 |
Tokyo | Kindai Tokyo Tech Front, Tokyo Tech (Ookayama Campus(Higashi-osaka) (Tokyo) | A Method for Evaluating Mechanical Quality Factor Qm of ScAlN, GaN, PbTiO3, ZnO Piezoelectric Films and Metal Films Using GHz Ultrasonic Pulse-Echo Technique Yohkoh Shimano, Takahiko Yanagitani (Waseda Univ.) |
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| US | 2025-02-19 10:05 |
Tokyo | Kindai Tokyo Tech Front, Tokyo Tech (Ookayama Campus(Higashi-osaka) (Tokyo) | SAW Excitation by Solid Flat Electrode on Periodically Polarization Inverted ScAlN Thin Film Satoshi Matsumura, Yohkoh Shimano, Ono Naoki, Takahiko Yanagitani (Waseda Univ.), Yasuo Cho (Tohoku Univ.) |
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| US | 2025-02-19 16:45 |
Tokyo | Kindai Tokyo Tech Front, Tokyo Tech (Ookayama Campus(Higashi-osaka) (Tokyo) | [Invited Talk]
Polarization inverted ScAlN films for overtone mode BAW resonators Takahiko Yanagitani (Waseda Univ.) |
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| US | 2024-11-07 15:55 |
Aichi | AICHI INSTITUTE OF TECHNOLOGY Univ (Aichi) | c-Axis tilted LiNbO3 off-angle epitaxial thin film SMR Hiroki Uchida, Takahiko Yanagitani (Waseda Univ.)  US2024-58 |
The c-axis tilted LiNbO3 thin film bulk acoustic wave (BAW) filter is anticipated to exhibit a high electromechanical co... [more] | US2024-58 pp.35-40 |
| US | 2024-08-01 15:25 |
Shimane | Matsue Terrsa (Shimane) | Estimation of Electromechanical Coupling Coefficient from HBAR Using Multiple Echo Integration and Ratio of Dielectric Constant Yohkoh Shimano, Kohei Ekida, Takahiko Yanagitani (Waseda Univ.) US2024-24 |
IEEE standard recommends the resonance-antiresonance method for the estimation of electromechanical coupling coefficient... [more] | US2024-24 pp.37-42 |
| US | 2024-08-02 09:15 |
Shimane | Matsue Terrsa (Shimane) | Extraction of Longitudinal and Shear Mechanical Transmittance of Acoustic Bragg Reflector by GHz Pulse Echo Technique Motoshi Suzuki, YohKoh Shimano, Takahiko Yanagitani (Waseda Univ.) US2024-27 |
SMR is RF filter which consists of piezoelectric layer and Bragg reflector. However, evaluating the property of the sole... [more] | US2024-27 pp.52-57 |
| US | 2024-08-02 11:35 |
Shimane | Matsue Terrsa (Shimane) | SMR Type BAW Resonator using Epitaxial PbTiO3 Thin Film Wataru Shimoyama, Yohkoh Shimano, Takahiko Yanagitani (Waseda Univ.) US2024-32 |
Among BAW filters, SMR type resonators are fixed to the substrate via a Bragg reflector, which has the advantage of good... [more] | US2024-32 pp.75-80 |
| US | 2024-08-02 12:00 |
Shimane | Matsue Terrsa (Shimane) | GHz hysteresis curves of ScAlN thin films and pure AlN thin films Satoshi Matsumura, Ayaka Hanai, Takahiko Yanagitani (Waseda Univ.) US2024-33 |
ScAlN film have been widely used as an RF filter material, because of its high electromechanical coupling coefficient kt... [more] | US2024-33 pp.81-86 |
| MW, EMT, OPE, MWPTHz, EST, IEE-EMT [detail] | 2024-07-11 11:05 |
Hokkaido | otaru-shimin-kaikan (Hokkaido, Online) (Primary: On-site, Secondary: Online) |
Method for evaluating GHz band mechanical damping Yohkoh Shimano, Takahiko Yanagitani (Waseda Univ.) EMT2024-9 MW2024-33 OPE2024-12 EST2024-10 MWPTHz2024-16 |
Steepness in the frequency domain is one of the important evaluation factors for RF filters and the other acoustic wave ... [more] | EMT2024-9 MW2024-33 OPE2024-12 EST2024-10 MWPTHz2024-16 pp.13-14 |
| MW, EMT, OPE, MWPTHz, EST, IEE-EMT [detail] | 2024-07-11 11:55 |
Hokkaido | otaru-shimin-kaikan (Hokkaido, Online) (Primary: On-site, Secondary: Online) |
Electromechanical coupling coefficient evaluation method using RLC electric resonance in the GHz band Hiroki Uchida, Kohei Ekida, Yohkoh Shimano, Takahiko Yanagitani (Waseda Univ.) EMT2024-11 MW2024-35 OPE2024-14 EST2024-12 MWPTHz2024-18 |
The electromechanical coupling coefficient kt2 is one of the important parameters that determine the performance of piez... [more] | EMT2024-11 MW2024-35 OPE2024-14 EST2024-12 MWPTHz2024-18 pp.18-19 |
| MW, EMT, OPE, MWPTHz, EST, IEE-EMT [detail] | 2024-07-11 16:50 |
Hokkaido | otaru-shimin-kaikan (Hokkaido, Online) (Primary: On-site, Secondary: Online) |
Lead Titanate Epitaxial Thin Film Resonator for GHz-Band RF Filters Wataru Shimoyama, Yohkoh Shimano, Takahiko Yanagitani (Waseda Univ.) EMT2024-19 MW2024-43 OPE2024-22 EST2024-20 MWPTHz2024-26 |
Bragg reflector type resonators have good heat dissipation and high electrical resistance. On the other hand, it is impo... [more] | EMT2024-19 MW2024-43 OPE2024-22 EST2024-20 MWPTHz2024-26 pp.56-57 |
| EA, US (Joint) |
2023-12-22 13:00 |
Fukuoka | (Fukuoka) | [Poster Presentation]
Double mode type BAW filter based on ScAlN multilayers SMR using stacked electrodes Saneyuki Shibata, Takahiko Yanagitani (Waseda Univ.) US2023-56 |
Surface acoustic wave (SAW) filters, which use surface acoustic waves, and bulk acoustic wave (BAW) filters, which use b... [more] | US2023-56 pp.1-6 |
| EA, US (Joint) |
2023-12-22 13:00 |
Fukuoka | (Fukuoka) | [Poster Presentation]
c-Axis tilted epitaxial ScAlN self-supporting thin film resonators with epitaxial ZnO sacrificial layer Shiori Kobayashi, Takahiko Yanagitani (Waseda Univ.) US2023-59 |
Piezoelectric thin films with high shear mode electromechanical coupling coefficient k´352 are attractive to improve S/N... [more] | US2023-59 pp.18-23 |
| EA, US (Joint) |
2023-12-22 13:00 |
Fukuoka | (Fukuoka) | [Poster Presentation]
Fabrication of epitaxial piezoelectric layer/acoustic Bragg reflector structure by etching of epitaxial sacrificial layer Satoshi Tokai, Takahiko Yanagitani (Waseda Univ.) US2023-60 |
Q factor and power durability are expected to be improve d by using s ingle crystalline piezoelectric thin films in BAW ... [more] | US2023-60 pp.24-29 |
| EA, US (Joint) |
2023-12-22 15:20 |
Fukuoka | (Fukuoka) | [Poster Presentation]
Electromechanical coupling coefficient hysteresis curve of free-standing PbTiO3 epitaxial thin film resonators Sota Kuninobu, Takahiko Yanagitani (Waseda Univ.) US2023-62 |
[more] | US2023-62 pp.35-40 |
| EA, US (Joint) |
2023-12-22 15:20 |
Fukuoka | (Fukuoka) | [Poster Presentation]
Detection of biomaterial interaction by ultrasonic reflectometry in the UHF range Ayane Mogi, Takahiko Yanagitani (Waseda Univ.) US2023-63 |
QCM (quartz crystal microbalance) is extensively used for biomolecules sensing. However, it is not clear that whether t... [more] | US2023-63 pp.41-46 |
| EA, US (Joint) |
2023-12-22 15:20 |
Fukuoka | (Fukuoka) | [Poster Presentation]
SMR-type piezoelectric transformer using shear mode c-axis zigzag ScAlN multilayer Kazutaka Siraiwa (Waseda Univ.), Takahiko Yanagitani (Waseda univ.) US2023-64 |
RF signal can be converted to DC signal using an antenna and diode (rectenna). When distance of wireless transfer is lon... [more] | US2023-64 pp.47-52 |
| EA, US (Joint) |
2023-12-22 15:20 |
Fukuoka | (Fukuoka) | [Poster Presentation]
Large area growth of c-axis tilted Sc0.4Al0.6N thin films using planar sputtering with rectangular cathode Naoki Ishii, Yhoho Shimano, Takahiko Yanagitani (Waseda Univ.) US2023-65 |
c-axis normal ScAlN thin films with Sc concentration exceeding 40% possess high thickness extensional mode electromechan... [more] | US2023-65 pp.53-58 |
| US | 2023-11-27 10:50 |
Shizuoka | Shizuoka University (Shizuoka) | High power characteristics of nitride multilayered piezoelectric thin films for RF filters Saneyuki Shibata, Takahiko Yanagitani (Waseda Univ.) US2023-45 |
[more] | US2023-45 pp.11-16 |
| US | 2023-11-27 11:15 |
Shizuoka | Shizuoka University (Shizuoka) | High quasi-shear mode electromechanical coupling coefficients of c-axis tilted epitaxial PbTiO3 thin films Sota Kuninobu, Takahiko Yanagitani (Waseda Univ.) US2023-46 |
[more] | US2023-46 pp.17-22 |
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