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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 17 of 17  /   
Committee Date Time Place Paper Title / Authors Abstract Paper #
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
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
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
US 2022-01-25
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
US 2021-11-26
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]
US 2020-11-05
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
US 2020-11-05
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
US 2020-09-28
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
US 2020-09-28
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
US 2020-09-28
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
US 2019-07-29
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
US 2018-10-04
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
US 2018-10-04
Miyagi   c-Axis tilted ScAlN film shear mode resonators for detection of biomolecular interactions in liquid
Hana Yazaki, Takumi Soutome, Rei Karasawa (Waseda Univ.), Shinji Takayanagi (Nagoya Inst. Tech.), Kenji Yoshida (Chiba Univ.), TakahikoYanagitani (Waseda Univ.) US2018-54
Miniature and highly sensitive biosensors are required. c-Axis tilted ScAlN film resonator is suitable for sensing biomo... [more] US2018-54
US 2017-07-27
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
US 2015-10-09
Ishikawa Kanazawa Institute of Technology Brillouin scattering measurement of coherent phonons induced by ScAlN piezoelectric thin film
Eunhye Cho, Masahiko Kawabe, Shinji Takayanagi (Doshisha Univ.), Masashi Suzuki, Takahiko Yanagitani (Waseda Univ.), Mami Matsukawa (Doshisha Univ.) US2015-63
Brillouin scattering spectroscopy allows to investigate a shift frequency of the incident light in GHz range, which occu... [more] US2015-63
US 2015-09-03
Hokkaido   Electromechanical coupling coefficients of c-axis parallel oriented ScAlN films grown by ion-beam assisted RF magnetron sputtering
Mineki Oka, Shinji Takayanagi (Doshisha Univ.), Takahiko Yanagitani (Waseda Univ.), Mami Matsukawa (Doshisha Univ.) US2015-51
Recently, Akiyama et al. found that doping scandium into AlN film increases the number of piezoelectric coefficient d33 ... [more] US2015-51
US 2015-06-19
Kumamoto Kumamoto University Simultaneous measurement of acoustic wave velocity and ordinary refractive index of c-axis oriented films by Brillouin scattering technique
Shota Tomita (Doshisha Univ), Takahiko Yanagitani, Masashi Suzuki (Waseda Univ), Shinji Takayanagi, Mami Matsukawa (Doshisha Univ) US2015-20
A Brillouin scattering technique for the simultaneous measurement of acoustic wave velocities and refractive indices is ... [more] US2015-20
 Results 1 - 17 of 17  /   
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