Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Keisuke Kashiwa"'
Publikováno v:
2022 IEEE 34th International Symposium on Power Semiconductor Devices and ICs (ISPSD).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bcd2c7add81278ed56025a2d2db82efe
https://doi.org/10.1109/ispsd49238.2022.9813534
https://doi.org/10.1109/ispsd49238.2022.9813534
Comparative study on short-circuit and surge current capabilities of 1.2 kV SiC SBD-embedded MOSFETs
Publikováno v:
Japanese Journal of Applied Physics. 62:SC1073
This paper presents a comparative study on the short-circuit and surge current withstanding capabilities and the static and turn-on switching characteristics of commercial 1.2 kV SiC Schottky barrier diode (SBD)-embedded metal–oxide–semiconductor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::68350ddd1d5fa22605f8dca4a3b9e83e
https://doi.org/10.35848/1347-4065/acb8bf
https://doi.org/10.35848/1347-4065/acb8bf
Autor:
Kenji Yorita, MD, PhD, Chikane Ito, MD, Ai Fujioka, MD, Keisuke Kashiwagi, MD, Hiromichi Yamai, MD, PhD, Kimiko Nakatani, MD, Tatsuya Kumon, MD
Publikováno v:
Radiology Case Reports, Vol 18, Iss 1, Pp 280-284 (2023)
Syphilitic infection is usually observed in young patients, and the first stage of the disease (primary syphilis) is characterized by painless cutaneous and lymph node lesions. Herein, we describe a 71-year-old Japanese man with primary syphilis that
Externí odkaz:
https://doaj.org/article/8ba7b03f71854138923efba58c8586c1
Autor:
Keisuke Kashiwa, Masatsune Yamaguchi, T O Takano, Koichi Akahane, Tatsuya Omori, Ken-ya Hashimoto, Nan Wu, Sakae Meguro
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. 58:187-194
This paper describes the development of a phase-sensitive laser probe with fast mechanical scan for RF surface and bulk acoustic wave (SAW/BAW) devices. The Sagnac interferometer composed of micro-optic elements was introduced for the selective detec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fe1948705277f7368740e25836c890cd
https://doi.org/10.1109/tuffc.2011.1785
https://doi.org/10.1109/tuffc.2011.1785
Publikováno v:
Japanese Journal of Applied Physics. 47:4108-4110
This paper describes recent advance in the detection system for the fast-scanning and phase-sensitive laser probing system for surface acoustic wave (SAW) devices operating in a 2 GHz range. Electric and electro-optic components were examined, and hi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::91c6219f1e1ce69faff277bb76f6d083
https://doi.org/10.1143/jjap.47.4108
https://doi.org/10.1143/jjap.47.4108
Autor:
Tatsuya Omori, Sakae Meguro, Koichi Akahane, Osamu Takano, Nan Wu, Masatsune Yamaguchi, Ken-ya Hashimoto, Naoki Kasai, Keisuke Kashiwa
Publikováno v:
IUTAM Symposium on Recent Advances of Acoustic Waves in Solids ISBN: 9789048198924
This paper reviews a phase-sensitive and fast-scanning laser probingsystem developed by the authors’ group for the diagnosis of radio frequency (RF)surface and bulk acoustic wave (SAW/BAW) devices. The system is based on theSagnac interferometer, w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6ced28da91e8cd6b8c4783d8b19ab9a2
https://doi.org/10.1007/978-90-481-9893-1_22
https://doi.org/10.1007/978-90-481-9893-1_22
Publikováno v:
2009 IEEE International Ultrasonics Symposium.
This paper describes the enhancement of the measurement speed by compensating delay time caused in detection electronics. As a demonstration, an SAW field in a one-port resonator was visualised by the developed system. It is shown that under optimal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e8057f060a6cd28189c817db2998943a
https://doi.org/10.1109/ultsym.2009.5441688
https://doi.org/10.1109/ultsym.2009.5441688
Publikováno v:
2009 IEEE International Frequency Control Symposium Joint with the 22nd European Frequency and Time forum.
This paper describes a focus adjustment system particularly designed for the fast-mechanical-scanning and phase-sensitive laser probe for radio frequency (RF) surface and bulk acoustic wave (SAW/BAW) devices. When high spatial resolution is necessary
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d359a0996df5a8e2d560bf6cbc2faf72
https://doi.org/10.1109/freq.2009.5168321
https://doi.org/10.1109/freq.2009.5168321
Publikováno v:
2008 IEEE Ultrasonics Symposium.
This paper describes the application of the developed fast-scanning laser probe system to the diagnosis of frequency dependence of lateral energy leakage occurring in RF BAW devices. According to wavenumber domain analyses, dispersion relation for th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b068560eac6d38a122ab100f2047d6c2
https://doi.org/10.1109/ultsym.2008.0023
https://doi.org/10.1109/ultsym.2008.0023
Autor:
Keisuke Kashiwa, Osamu Takano, Masatsune Yamaguchi, Sakae Meguro, Ken-ya Hashimoto, Tatsuya Omori, Koichi Akahane
Publikováno v:
2008 IEEE MTT-S International Microwave Symposium Digest.
This paper describes the development of a new laser probe for radio frequency (RF) surface and bulk acoustic wave (SAW/BAW) devices. The Sagnac interferometer was introduced for the selective detection of RF vertical motion associated with RF SAW/BAW
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::db744421c0c3d8de6d37cce6c7bfa285
https://doi.org/10.1109/mwsym.2008.4632966
https://doi.org/10.1109/mwsym.2008.4632966