Committee |
Date Time |
Place |
Paper Title / Authors |
Abstract |
Paper # |
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 |
US |
2020-11-05 15:45 |
Aichi |
|
Resonant frequency shift and lattice strain of AlN and ScAlN SMR during DC bias voltage application caused by nonlinear effect Takumi Saotome, Takahiko Yanagitani (Waseda Univ.) US2020-49 |
Mobile communication device requires high power operation. Nonlinear signals such as second harmonic (H2) generation (SH... [more] |
US2020-49 pp.34-39 |
US |
2020-09-28 14:25 |
Online |
Online |
c-Axis tilted ScAlN film piezoelectric transformer in the UHF range Sarina Kinoshita (Waseda Univ./ZAIKEN), Takahiko Yanagitani (Waseda Univ./ZAIKEN/JST CREST) US2020-35 |
Battery-less sensors require energy harvesting from the ambient environment. RF-DC conversion with a rectifying antenna ... [more] |
US2020-35 pp.45-50 |
US |
2020-09-28 14:50 |
Online |
Online |
Effect of negative ions generated from ScAl sputtering targets on kt2 and crystal orientation of ScAlN thin films Rui Kihara (Waseda Univ.), Shinji Takayanagi (Doshisha Univ.), Takahiko Yanagitani (Waseda Univ.) US2020-36 |
ScAlN thin films with large electromechanical coupling coefficient have been attracting attention for the application to... [more] |
US2020-36 pp.51-56 |
US |
2020-09-28 15:15 |
Online |
Online |
Extraction of kt2 of HBAR by new conversion loss without acoustic losses in the substrate Ryota Tatsumi, Yanagitani Takahiko (Waseda Univ.) US2020-37 |
According to the IEEE standard, the resonance-antiresonance method for a self-standing film structure is recommended to ... [more] |
US2020-37 pp.57-60 |