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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| 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 |
| EA, US (Joint) |
2022-12-22 16:50 |
Hiroshima | Satellite Campus Hiroshima | [Poster Presentation]
Sputter epitaxial LiNbO3 film shear mode thin film resonators Shinya Kudo (Wseda Univ.), Takahiko Yanagitani (Waseda Univ.) US2022-66 |
LiNbO3 have been used for the SAW filters because of their high Q and k. However, LiNbO3 filter have not used in the BAW... [more] | US2022-66 pp.86-91 |
| 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 13:50 |
Online | Online | GHz ultrasonic reflectometry fingerprint imaging using epitaxial PbTiO3 ultrasonic transducers Yusuke Sato, Takahiko Yanagitani (Waseda Univ.) US2021-42 |
Fingerprint readers based on PZT and ScAlN pMUT in the MHz ranges are extensively studied. However, pMUTs operate in the... [more] | US2021-42 pp.13-18 |
| 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 | 2019-07-29 14:20 |
Hokkaido | Liquid viscoelasticity characterization by the complex reflection coefficient using quasi-shear mode c-axis tilted ScAlN thin film transducers Ryosuke Amano, Yui Yamakawa (Waseda Univ./ZAIKEN), Takahiko Yanagitani (Waseda Univ./ZAIKEN/JST-PREST) US2019-31 |
In the complex reflection measurement of liquid/solid interface, the low angle incidence of shear horizontal (SH) wave t... [more] | US2019-31 pp.19-23 |
|
| US | 2019-07-29 15:45 |
Hokkaido | Fabrication of thickness-shear mode resonators with ZnO film and their frequency characteristics of liquid loading Masaya Miyata, Shinji Takayanagi, Mami Matsukawa (Doshisha Univ.), Takahiko Yanagitani (Waseda Univ.) US2019-34 |
Thickness-shear mode resonators are applied to sensors to measure liquid viscosity and antigen-antibody reaction, becaus... [more] | US2019-34 pp.33-37 |
|
| US | 2018-11-02 15:20 |
Aichi | Deposition of c-axis parallel oriented ZnO film on entire surface of silica glass pipe Yuta Takamura (Doshisha Univ.), Shinji Takayanagi (Nagoya Inst. Tech.), Mami Matsukawa (Doshisha Univ.), Takahiko Yanagitani (Waseda Univ.) US2018-68 |
SH type SAW sensor can measure the viscosity, conductivity and permittivity of a liquid because it propagate to liquid /... [more] | US2018-68 pp.25-30 |
|
| US | 2018-10-04 10:50 |
Miyagi | Frequency switchable resonators in the GHz range based on polarity inverted PZT/PTO epitaxial stacks Takahiro Shimidzu, Takeshi Mori, Takahiko Yanagitani (Waseda Univ.) US2018-51 |
[more] | US2018-51 pp.13-18 |
|
| US | 2018-10-04 11:15 |
Miyagi | Comparison between new kt2 extraction method and conventional methods for film/substrate structure
-- Resonant frequency ratio method, conversion loss method, resonant spectrum method, and resonance antiresonance method -- Makoto Totsuka, Takahiko Yanagitani (Waseda Univ.) US2018-52 |
The electromechanical coupling coefficient kt2 is an important parameter for determining the performances of the RF piez... [more] | US2018-52 pp.19-24 |
|
| US | 2018-10-04 12:40 |
Miyagi | Evaluation of fluid viscosity in the ultrahigh frequency range using quasi-shear mode c-axis tilted ScAlN thin film resonators Yui Yamakawa, Takumi Soutome, Rei Karasawa, Takahiko Yanagitani (Waseda Univ.) US2018-53 |
In the fluid viscosity evaluation based on the QCM (Quartz Crystal Microbalance), the quartz crystal plate is required t... [more] | US2018-53 pp.25-29 |
|
| US | 2018-10-04 13:30 |
Miyagi | The influence of negative ions generation on various ScAl alloy sputtering targets to ScAlN film properties
-- Comparison of EB-melted, arc-melted and hot press sintered ScAl alloy targets -- Rei Karasawa (Waseda Univ.), Shinji Takayanagi (Nagoya Inst. Tech.), Yuka Endo (Waseda Univ.), Makoto Imasaka, Keisuke Morisaka, Yu Suzuki (Furuya Metal Co., Ltd.), Takahiko Yanagitani (Waseda Univ.) US2018-55 |
[more] | US2018-55 pp.37-42 |
|
| US | 2018-05-21 15:45 |
Tokyo | Polarity inverted cubic PMN-PT/ tetragonal PZT epitaxial film resonators for frequency switchable filters Takahiro Shimidzu, Takahiko Yanagitani (Waseda Univ.) US2018-16 |
In recent years, the number of bandpass filters in smartphone has been increasing because of international roaming syste... [more] | US2018-16 pp.29-34 |
|
| US | 2017-07-27 15:40 |
Okayama | Simultaneous viscosity evaluation in the MHz to GHz range by using shear mode HBAR consisting of ScAlN thin film/low TCF substrate Yui Yamakawa, Ko-hei Sano, Rei Karasawa (Waseda Univ.), Takahiko Yanagitani (Waseda Univ./JST) US2017-42 |
In order to study relaxation characteristics of viscoelasticity of the liquid, a wide frequency sweep in the range of MH... [more] | US2017-42 pp.61-66 |
|
| US | 2017-07-27 16:40 |
Okayama | Rapid measurement of longitudinal and shear wave velocities by Brillouin scattering from coherent induced phonons Masahiko Kawabe (Doshisha Univ.), Takahiko Yanagitani (Waseda Univ.), Shibagaki Yoshiaki (Doshisha Univ.), Shinji Takayanagi (Nagoya Inst. of Tech.), Masashi Suzuki (Waseda Univ.), Mami Matsukawa (Doshisha Univ.) US2017-44 |
Brillouin scattering method enables to evaluate thin films or transparent materials in the range from several hundred MH... [more] | US2017-44 pp.71-74 |
|
| US | 2016-04-18 11:00 |
Tokyo | Nishi-Waseda Campus, Waseda University | Polarity inverted ScAlN/ZnO piezoelectric film for 2nd mode ultrasonic transducer Takeshi Mori (Nagoya Inst. of Tech./Waseda Univ.), Masashi Suzuki, Takahiko Yanagitani (Waseda Univ.) US2016-1 |
[more] | US2016-1 pp.1-6 |
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