Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Hidehiko Yamaoka"'
Autor:
Kosumo Matsui, Kimiya Komurasaki, Waku Hatakeyama, Kohei Shimamura, Kohei Fujiwara, Hidehiko Yamaoka
Publikováno v:
Active and Passive Electronic Components, Vol 2020 (2020)
Wireless power transfer (WPT) is one solution to realize long flight times and accommodate various missions of micro-uncrewed aerial vehicles (MAVs). Reducing the constraint of power transmission distance and realizing high beam efficiency are possib
Externí odkaz:
https://doaj.org/article/ae34bc6830e14d8a81f744d0dbf93c59
Autor:
Yuya Yamashita, Takuya Akiba, Toshihide Iwanaga, Shuichi Date, Hidehiko Yamaoka, Hiroshi Akatsuka
Publikováno v:
IEEE Transactions on Plasma Science. 50:1875-1889
Previously, we reported an optimization algorithm based on a plasma diagnostic model for optical emission spectroscopic (OES) measurements. In this study, we improved the algorithm. In the improved algorithm, the dependence of unimodality of reduced
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f6ab41f42f156c94793d1331cd07d5a8
https://doi.org/10.1109/tps.2022.3172944
https://doi.org/10.1109/tps.2022.3172944
Autor:
Yoshikazu Fujinaka, Hidehiko Yamaoka, Shingo Ozaki, Tatsunori Onzuka, Kohei Fujiwara, Yoneo Akita
Publikováno v:
IET Radar, Sonar & Navigation. 13:1428-1436
The authors explain the development of a cost-effective frequency-modulated continuous wave (FMCW) radar test system in the E-band with a simple-structure, and demonstrate it for an automotive application using an FMCW radar chipset evaluation board
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ded059061bd4fd4e778f350f46cdb727
https://doi.org/10.1049/iet-rsn.2018.5545
https://doi.org/10.1049/iet-rsn.2018.5545
Publikováno v:
2019 IEEE Asia-Pacific Microwave Conference (APMC).
In general, a millimeter-wave instrument is expensive and therefore, it is an entry barrier to small- and medium-sized enterprises working in millimeter-wave industries. Thus, we have developed a simple and cost-effective IEEE802.11ad test system in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b5f686e515b60324d7e7d045f78ed12
https://doi.org/10.1109/apmc46564.2019.9038635
https://doi.org/10.1109/apmc46564.2019.9038635
Autor:
Takuya Akiba, Hiroshi Akatsuka, Toshihide Iwanaga, Hidehiko Yamaoka, Shuichi Date, Yuya Yamashita
Publikováno v:
Japanese Journal of Applied Physics. 60:046003
In this work, an optimization algorithm was proposed for plasma diagnostic modeling based on a statistical analysis of reduced population density distribution. The algorithm generates a diagnostic equation, whose input parameters are the radiant flux
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ba8dbd1c92fb59771b14a146ac662c36
https://doi.org/10.35848/1347-4065/abe642
https://doi.org/10.35848/1347-4065/abe642
Autor:
Kimiya Komurasaki, Hidehiko Yamaoka, Kosumo Matsui, Kohei Shimamura, Kohei Fujiwara, Waku Hatakeyama
Publikováno v:
Active and Passive Electronic Components, Vol 2020 (2020)
Wireless power transfer (WPT) is one solution to realize long flight times and accommodate various missions of micro-uncrewed aerial vehicles (MAVs). Reducing the constraint of power transmission distance and realizing high beam efficiency are possib
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c1e1bd692db966f04bba2f61768b837c
https://tsukuba.repo.nii.ac.jp/records/2002306
https://tsukuba.repo.nii.ac.jp/records/2002306
Publikováno v:
2018 Asia-Pacific Microwave Conference (APMC).
In this work, we have developed a new low-temperature co-fired ceramic (LTCC) substrate for millimeterwave circuits. The substrate has a low dielectric loss tangent of 0.0019 and a dielectric constant of 7.65 at a frequency of 60 GHz. An accuracy of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::59aabcd5bac6e9a94eb24efb5f9d560c
https://doi.org/10.23919/apmc.2018.8617240
https://doi.org/10.23919/apmc.2018.8617240
Autor:
Hidehiko Yamaoka, Yoneo Akita, Shingo Ozaki, Tatsunori Onzuka, Yoshikazu Fujinaka, Kohei Fujiwara
Publikováno v:
2018 International Conference on Radar (RADAR).
In this study, a simple frequency-modulated continuous wave (FMCW) radar test system for an anti-collision automobile radar in the 79 GHz band has been developed. This system consists of a down-converter based on a fundamental mixer with a phase-lock
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::250013f9777654b0cabf36ad98de3882
https://doi.org/10.1109/radar.2018.8557238
https://doi.org/10.1109/radar.2018.8557238
Autor:
Hidehiko Yamaoka, Kimiya Komurasaki, Kohei Fujiwara, Kosumo Matsui, Hiroyuki Koizumi, Yuki Okamoto, Yoshio Mita
Publikováno v:
2018 IEEE Wireless Power Transfer Conference (WPTC).
In an RF energy wireless power transfer, it is a strong point to choose a millimeter-wave band. Because the system can be more compact-size caused by shorter wavelength. Then, it is possible to reduce a rectenna area if the rectified DC power is equi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bda70886d38a43526d406310fda60e93
https://doi.org/10.1109/wpt.2018.8639081
https://doi.org/10.1109/wpt.2018.8639081
Autor:
Hidehiko Yamaoka, Takeshi Kobayashi, Shingo Ozaki, Tatunori Onzuka, Yoneo Akita, Atsushi Nakagawa, Kohei Fujiwara, Yoshiichi Fujinaka
Publikováno v:
2017 IEEE Asia Pacific Microwave Conference (APMC).
We developed a 60 GHz band IEEE802.11ad test solution with low cost and a simple structure. It consists of an up-converter based on a Gunn oscillator and a fundamental mixer with an arbitrary waveform generator. We confirmed that the performance of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f0fafd3012c2e6e4f2d39ba8d46abcd
https://doi.org/10.1109/apmc.2017.8251425
https://doi.org/10.1109/apmc.2017.8251425