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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| US | 2024-08-01 15:25 |
Shimane | Matsue Terrsa | 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 | 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 12:00 |
Shimane | Matsue Terrsa | 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 11:30 |
Hokkaido | otaru-shimin-kaikan (Primary: On-site, Secondary: Online) |
Broadband piezoelectric thin film transformer for terrestrial digital band rectenna applications Ekida Kohei, Kinoshita Sarina, Shimano Yohkoh, Yanagitani Takahiko (Waseda Univ.) EMT2024-10 MW2024-34 OPE2024-13 EST2024-11 MWPTHz2024-17 |
There is a demand for technology that can provide wireless power supply using ambient electromagnetic waves. In this stu... [more] | EMT2024-10 MW2024-34 OPE2024-13 EST2024-11 MWPTHz2024-17 pp.15-17 |
| EA, US (Joint) |
2023-12-22 13:00 |
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 | [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 15:20 |
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 | [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 | [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 16:10 |
Shizuoka | Shizuoka University | 30-layer polarization inversion HBAR for acoustic separation of piezoelectric layer and substrate Kazutaka Shiraiwa, Takahiko Yanagitani (Waseda univ) US2023-54 |
There are two types of BAW resonators, FBAR (film bulk acoustic resonator: free standing structure) and SMR (Solidly mou... [more] | US2023-54 pp.61-66 |
| US | 2023-11-27 16:35 |
Shizuoka | Shizuoka University | SMR based on epitaxial ScAlN piezoelectric thin films/epitaxial acoustic Bragg reflector Satoshi Tokai, Takahiko Yanagitani (Waseda Univ.) US2023-55 |
Single crystalline piezoelectric thin films possess higher power durability and Q factor than polycrystalline ones. Howe... [more] | US2023-55 pp.67-72 |
| MIKA (3rd) |
2023-10-11 14:30 |
Okinawa | Okinawa Jichikaikan (Primary: On-site, Secondary: Online) |
[Poster Presentation]
High power characteristics of nitride multilayered piezoelectric thin films for RF filters Saneyuki Shibata, Takahiko Yanagitani (Waseda Univ.) |
In the 5th generation mobile communication systems (5G), which are currently in widespread use, and in the 6G and beyond... [more] | |
| MIKA (3rd) |
2023-10-11 14:30 |
Okinawa | Okinawa Jichikaikan (Primary: On-site, Secondary: Online) |
[Poster Presentation]
Multilayer piezoelectric thin-film resonators aimed at RF filters for base stations Kazutaka Shiraiwa, Takahiko Yanagitani (Waseda Univ.) |
Currently, the demand for wireless communications at high-frequency such as 5G and 6G is increasing. Piezoelectric mater... [more] | |
| EST, MW, EMT, OPE, MWPTHz, IEE-EMT [detail] | 2023-07-20 15:15 |
Hokkaido | Muroran Institute of Technology (Primary: On-site, Secondary: Online) |
Elastic constant tensors cijE of (0001) ScxAl1-xN thin films (x=0-0.63) measured by Brillouin light scattering method Hiroki Uchida (Waseda Univ.), Hayato Ichihashi (Doshisya Univ.), Masashi Suzuki (Yamanashi Univ.), Shinji Takayanagi, Mami Matsukawa (Doshisya Univ.), Takahiko Yanagitani (Waseda Univ.) EMT2023-20 MW2023-38 OPE2023-20 EST2023-20 MWPTHz2023-16 |
Large piezoelectricity and high Q factor in ScAlN film is attractive for RF filter applications. . Elastic constant tens... [more] | EMT2023-20 MW2023-38 OPE2023-20 EST2023-20 MWPTHz2023-16 pp.61-66 |
| EA, US (Joint) |
2022-12-22 16:50 |
Hiroshima | Satellite Campus Hiroshima | [Poster Presentation]
Q factor extraction of ScAlN, ZnO, PZT piezoelectric films without etching substrate Yuki Shimizu (Waseda Univ.), Takahiko Yanagitani (Waseda Univ./JST) US2022-61 |
In recent years, sharp passband is required for RF filters to prevent interference between neighboring bands. The sharpn... [more] | US2022-61 pp.56-61 |
| EA, US (Joint) |
2022-12-22 16:50 |
Hiroshima | Satellite Campus Hiroshima | [Poster Presentation]
Characteristics of YbGaN and YbAlN epitaxial thin film resonators Song Li, Junjun Jia, Takahiko Yanagitani (Waseda Univ.) US2022-64 |
Bulk acoustic wave (BAW) resonators based on AlN or GaN piezoelectric thin films are suitable for GHz frequency filters ... [more] | US2022-64 pp.74-79 |
| EA, US (Joint) |
2022-12-22 16:50 |
Hiroshima | Satellite Campus Hiroshima | [Poster Presentation]
A method for evaluating acoustic Bragg reflector by GHz pulse echo technique with SiO2 delay line Keita Kondo, Naoki Ishii, Motoshi Suzuki (Waseda Univ.), Takahiko Yanagitani (Waseda Univ. /JST) US2022-65 |
Experimental data of the sole Bragg reflector is difficult to be measured. This is because the property of a piezoelectr... [more] | US2022-65 pp.80-85 |
| US | 2022-01-25 11:25 |
Online | Online | Transversal type BAW filter based on c-axis zig-zag polarization inverted ScAlN multilayers Kota Izumi, Takahiko Yanagitani (Waseda Univ.) US2021-59 |
Surface acoustic wave (SAW) transversal type filter is attractive because of their independent control of amplitude and ... [more] | US2021-59 pp.5-10 |
| US | 2021-11-26 14:15 |
Online | Online | 0.3 mm 10 MHz ScAlN thin plate ultrasonic transducer fabricated by sputtering growth Naoya Iwata, Takahiko Yanaigtani (Waseda Univ.) US2021-43 |
PZT (Pb(Zr,Ti)O3) ceramics and PMN-PT (Pb(Mg1/3Nb2/3)O3-PbTiO3) single crystals with large electromechanical coupling c... [more] |
US2021-43 pp.19-24 |
| US | 2020-11-05 13:00 |
Aichi | Effect of negative ion bombardment increased in low-pressure sputtering deposition on crystallinity and piezoelectric property of ScAlN thin film Takumi Tominaga, Shinji Takayanagi (Doshisha Univ.), Takahiko Yanagitani (Waseda Univ.) US2020-43 |
Since the ScAlN film has much higher piezoelectric response than the AlN film, it is expected to be applied to BAW devic... [more] | US2020-43 pp.1-6 |
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