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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| 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 |
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| 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) |
2023-10-10 15:35 |
Okinawa | Okinawa Jichikaikan (Primary: On-site, Secondary: Online) |
[Poster Presentation]
Epitaxial piezoelectric thin film multilayer structure for RF filters Satoshi Tokai, Yanagitani Takahiko (Waseda Univ.) |
Wireless communication devices such as smartphones are equipped with many frequency filters to transmit and receive only... [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 |
| EST, MW, EMT, OPE, MWPTHz, IEE-EMT [detail] | 2023-07-21 13:25 |
Hokkaido | Muroran Institute of Technology (Primary: On-site, Secondary: Online) |
Development of new method for evaluating electromechanical coupling coefficient using Mason’s equivalent circuit model simulation Yohkoh Shimano (Waseda Univ.), Kohei Yatabe (Tokyo Univ. of Agri. and Tech.), Takahiko Yanagitani (Waseda Univ.) EMT2023-56 MW2023-74 OPE2023-56 EST2023-56 MWPTHz2023-52 |
The electromechanical coupling coefficient is one of the important parameters for determining the performances of RF fil... [more] | EMT2023-56 MW2023-74 OPE2023-56 EST2023-56 MWPTHz2023-52 pp.241-242 |
| US | 2023-01-25 13:55 |
Online | Online | Experimental verification of compact airborne ultrasound emitter using annular piezoelectric ceramics Chiharu Asano, Kyosuke Shimizu, Osumi Ayumu, Ito Youichi (Nihon Univ.) US2022-72 |
We have studied scanning elastic wave source technique using Airborne Ultrasound Phased Array (AUPA) as one of non-conta... [more] | US2022-72 pp.7-11 |
| EA, US (Joint) |
2022-12-22 13:30 |
Hiroshima | Satellite Campus Hiroshima | [Poster Presentation]
Bending angle dependence of PLLA piezoelectric sensor Yoshihito Azuma, Ken Yamamoto, Jun Takarada, Riku Nakanishi, Isamu Nakagawa, Wang Yizhao (Kansai Univ.), Kenichi Mori, Masamichi Ando (Murata Manufacturing), Yoshiro Tajitsu (Kansai Univ.) US2022-56 |
Poly-L-lactic acid (PLLA), which is a biodegradable polymer, is one of the materials that has been attracting attention ... [more] | US2022-56 pp.28-31 |
| 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]
Effect of electrode area on kt2 extraction methods from piezoelectric film/substrate structure Ryo Seki, Yuki Shimizu, Keita Kondo, Takahiko Yanagitani (Waseda Univ) US2022-63 |
Electromechanical coupling coefficient (kt2) is one of the important parameters to determine the performance of BAW devi... [more] | US2022-63 pp.68-73 |
| US | 2022-11-29 14:35 |
Toyama | Consortium of universities in toyama | Effect of refractive index change in water induced by 100-megahertz-range high-intensity ultrasound on the incident light Yuki Harada (Doshisha Univ.), Mutsuo Ishikawa (Toin Univ. of Yokohama), Inamoto Shuto, Mami Matsukawa, Daisuke Koyama (Doshisha Univ.) US2022-46 |
High frequency ultrasound transducers are used in various fields such as non-destructive tests and imaging techniques fo... [more] | US2022-46 pp.17-20 |
| SDM | 2022-10-19 14:05 |
Online | Online | Evaluation and analysis of ferroelectric BiFeO3 thin film surface Fuminobu Imaizumi (NIT, Oyama) SDM2022-58 |
Devices and sensors using ferroelectric and piezoelectric materials are currently used in various fields, but Pb(Zr,Ti)O... [more] | SDM2022-58 pp.16-19 |
| 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 |
| HPB (2nd) |
2021-09-28 15:50 |
Online | Online | Fundamental Study on Measurement of Electric field Around Electric wires with Piezoelectric film Shunkichi Takamatsu (NITTC), Takaya Yoshitake (UEC), Shinichiro Mito (NITTC) |
An inexpensive non-metal-contact voltage measurement has been attracting much attention, since voltage of a commercial p... [more] | |
| US | 2021-01-29 14:15 |
Online | Online | Attempt of simple Brillouin scattering measurement using excited phonons Shuhei Nishikawa, Shuto Inamoto, Shoya Ueno, Mami Matsukawa (Doshisha Univ) US2020-59 |
By observing Brillouin light scattering, the longitudinal and transverse wave velocities in the GHz range can be measure... [more] | US2020-59 pp.9-14 |
| 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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| SDM | 2020-10-22 15:20 |
Online | Online | Lattice Matching and X-ray Structural Analysis of Ferroelectric Thin Film BiFeO3 Fuminobu Imaizumi, Rikuto Nakada (NIT, Oyama College) SDM2020-20 |
With the increasing use of Internet of Things in various domains, which has led to an increase in the number of sensors ... [more] | SDM2020-20 pp.30-33 |
| 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 | 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 |
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| 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 |
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