Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Kazuhisa Yamauchi"'
Publikováno v:
Mechanical Engineering Journal, Vol 3, Iss 3, Pp 15-00533-15-00533 (2016)
Huge amount of CVD-diamond coated milling tools were used for machining of CFRP and CFRTP sheets and blocks in the airplane and automotive industries. Because of chipping and tooth-tip damage in the diamond coatings during those dry machining process
Externí odkaz:
https://doaj.org/article/87e73d7b5ac54ddc8a3b4683d3846f73
Publikováno v:
THE 2ND INTERNATIONAL CONFERENCE ON PHYSICAL INSTRUMENTATION AND ADVANCED MATERIALS 2019.
The oxygen plasma has employed to remove the coating material in the surface of the substrate. The plasma parameter such as pressure has a role in the removing process. The pressure supplies a lot of gas inside the chamber. The quantity of gas pressu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f09a284486830a9750de5ca92be2373b
https://doi.org/10.1063/5.0034274
https://doi.org/10.1063/5.0034274
Autor:
Naoko Matsunaga, Moriyasu Miyazaki, Toshio Nojima, Kazuhisa Yamauchi, Kenichi Horiguchi, Ryoji Hayashi
Publikováno v:
IEICE Transactions on Electronics. :975-982
This paper presents a digital predistorter with a wideband memory effect compensator for a Doherty power amplifier (PA). A simple memory-predistortion model, which consists of a look-up-table (LUT) and an adaptive filter equalizing memory effects, an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::94513a253213babd59e3afcab0541483
https://doi.org/10.1587/transele.e93.c.975
https://doi.org/10.1587/transele.e93.c.975
Publikováno v:
IEICE Transactions on Electronics. :1032-1037
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::95361e325d148f39aec4d714b0523a76
https://doi.org/10.1587/transele.e93.c.1032
https://doi.org/10.1587/transele.e93.c.1032
Autor:
Hiroyuki Nonomura, Hifumi Noto, Kazuhisa Yamauchi, Masatoshi Nakayama, Satoshi Kunugi, Yoshihito Hirano
Publikováno v:
2011 IEEE MTT-S International Microwave Symposium.
Summary form only given, as follows. A Ku-band 60 W GaN power amplifier is presented. To obtain the high efficiency, new matching circuit topology to control the reflection phase at the 2nd harmonic frequency (2fo) is applied to the power amplifier.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d2337c12ba89f47425a1614c28226ed
https://doi.org/10.1109/mwsym.2011.5972762
https://doi.org/10.1109/mwsym.2011.5972762
Autor:
Y. Kittaka, Kazuhisa Yamauchi, Masaki Kohno, Shinichi Miwa, Masatoshi Nakayama, Takashi Yamasaki, Seiki Goto, H. Minamide, Naohito Yoshida
Publikováno v:
2010 IEEE MTT-S International Microwave Symposium.
This paper describes a high efficiency (68%), high output power (100W), high reliability GaN HEMT amplifier for C-band space applications. The high efficiency is achieved by 2nd-harmonic frequency (2f o ) tuning circuits in the input and output match
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5d571b6c490a4f53a730557bccfad2bb
https://doi.org/10.1109/mwsym.2010.5516252
https://doi.org/10.1109/mwsym.2010.5516252
Autor:
Akira Inoue, Kunihiro Endo, Yoshihito Hirano, Koji Yamanaka, Kazuhisa Yamauchi, Kazuhiko Nakahara, Shin Chaki, Hiroshi Otsuka
Publikováno v:
2010 IEEE Radio Frequency Integrated Circuits Symposium.
A Q-band 6W MMIC power amplifier was developed, which employed 3-way power combination circuit to combine 12 FET cells for high output power. In addition, the pi type bias and matching circuit was applied to the inter-stage matching circuit to suppre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9c98073e9a8592529d5133bbcff9d1cd
https://doi.org/10.1109/rfic.2010.5477361
https://doi.org/10.1109/rfic.2010.5477361
Autor:
J. Nagano, M. Miki, K. Horiguchi, Tadashi Takagi, Kazuhisa Yamauchi, Haruyasu Senda, Masatoshi Nakayama
Publikováno v:
2004 IEEE MTT-S International Microwave Symposium Digest (IEEE Cat. No.04CH37535).
A look up table (LUT) type adaptive digital pre-distortion (ADPD) using a weight divided adaptive algorithm is presented. In this algorithm, an output signal of the power amplifier (PA) is used as a reference signal. Additionally, reference signal is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e2ed6ea2c403e121662bf132ea794ea4
https://doi.org/10.1109/mwsym.2004.1339009
https://doi.org/10.1109/mwsym.2004.1339009
Autor:
Yoshitada Iyama, Yutaka Kazekami, Mamiko Yamaguchi, Tadashi Takagi, Yukio Ikeda, Kazuhisa Yamauchi
Publikováno v:
21st International Communications Satellite Systems Conference and Exhibit.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8ef71a40485905e69be4504d4ab3555b
https://doi.org/10.2514/6.2003-2384
https://doi.org/10.2514/6.2003-2384
Autor:
Yoshitada Iyama, Koji Yamanaka, Morishige Hieda, Kazutomi Mori, Kazuhisa Yamauchi, Hiromasa Nakaguro, Tadashi Takagi
Publikováno v:
31st European Microwave Conference, 2001.
A large-signal simulation program for multi-stage power amplifier modules by using a novel interpolation is presented. The Load-Pull and Source-Pull (LP/SP) data are provided from small number of measured LP/SP data by using a novel interpolation. Th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::837f8fc2497fb1da43b42b610a6915a7
https://doi.org/10.1109/euma.2001.339070
https://doi.org/10.1109/euma.2001.339070