Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Hidema Uchishiba"'
Autor:
Hideki Ohmori, Y. Satoh, Osamu Ikata, Masanori Ueda, Tokihiro Nishihara, Osamu Kawachi, Hidema Uchishiba, Ken-ya Hashimoto
Publikováno v:
1995 IEEE Ultrasonics Symposium. Proceedings. An International Symposium.
The paper presents ion implantation technology to improve the shape factor of a ladder-type SAW RF filters for mobile communication systems. The improvement of the shape factor was confirmed experimentally. However we found that the SAW phase velocit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::613097d52f7e73e51396aa8c411dbf5f
https://doi.org/10.1109/ultsym.1995.495552
https://doi.org/10.1109/ultsym.1995.495552
Publikováno v:
1995 IEEE Ultrasonics Symposium. Proceedings. An International Symposium.
This paper describes the improvement in power durability of SAW filters in terms of filter designs and electrode materials. In this study, we used the previously reported ladder-type filter composed of one-port SAW resonators. For filter design, shor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::03c99e84e744c78761520d7194595fba
https://doi.org/10.1109/ultsym.1995.495603
https://doi.org/10.1109/ultsym.1995.495603
Publikováno v:
Proceedings of IEEE Ultrasonics Symposium ULTSYM-94.
This paper describes L and S band low-loss filters using one-port SAW resonators in a ladder circuit structure. Four kinds of filters were developed. Three types have a wide frequency band, with fractional bandwidth of about 4%. A 36d y-x LiTaO3 subs
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d60df571c4d5d78dc56c57d25ed9eacc
https://doi.org/10.1109/ultsym.1994.401573
https://doi.org/10.1109/ultsym.1994.401573
Autor:
Hideki Ohmori, H. Taniguchi, Nobuo Hirasawa, Osamu Ikata, Ken-ya Hashimoto, Hidema Uchishiba, Y. Satoh
Publikováno v:
1993 Proceedings IEEE Ultrasonics Symposium.
For smaller handheld telephones, we have developed a small antenna duplexer. This paper describes the fabrication and characteristics of our duplexer. Our package, which comprises two cavities and impedance control circuits with a strip line, has a m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::635d00d60c9199194d556fa5e2baf986
https://doi.org/10.1109/ultsym.1993.339694
https://doi.org/10.1109/ultsym.1993.339694
Publikováno v:
Japanese Journal of Applied Physics. 34:2688
For portable telephone applications, we improved the power durability of ladder-type filters composed of one-port surface acoustic wave (SAW) resonators. In these ladder-type filters, the chip temperature was raised and power durability was weak arou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5f556fb0eca01fbc9690bbaa99a57d31
https://doi.org/10.1143/jjap.34.2688
https://doi.org/10.1143/jjap.34.2688
Publikováno v:
Journal of Applied Physics. 48:2604-2607
Bubble collapse fields in several kinds of garnet films ion implanted for hard‐bubble suppression were measured in the presence of an in‐plane magnetic field and were found to vary according to the direction of the in‐plane field. That is, bubb
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::14159a893a31e48e8e1c386a353cd0f5
https://doi.org/10.1063/1.323983
https://doi.org/10.1063/1.323983
Publikováno v:
IEEE Transactions on Magnetics. 9:381-385
A method of eliminating the external magnetic bias field necessary to sustain stable cylindrical magnetic domains (magnetic bubbles) is presented. This method uses double-layer garnet films. The films were grown on the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::530a4ad31ff75418d360f81056e1e9c7
https://doi.org/10.1109/tmag.1973.1067617
https://doi.org/10.1109/tmag.1973.1067617
Publikováno v:
Journal of the Physical Society of Japan. 27:600-604
The low temperature transition of α'-MnZn 3 alloy of Cu 3 Au type structure has been investigated by X-ray and neutron diffraction experiments, dilatometry, magnetization measurements and specific heat measurements. This alloy exhibits antiferromagn
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6074833ea203a4dfa0fc16cb06fe2af9
https://doi.org/10.1143/jpsj.27.600
https://doi.org/10.1143/jpsj.27.600
Autor:
Hidema Uchishiba
Publikováno v:
Journal of the Physical Society of Japan. 31:436-440
Manganese-rich γ-phase alloys of Mn-Ni, Mn-Zn, Mn-Ga and Mn-Ge have been investigated with X-ray and neutron diffraction and specific heat measurements. The Mn-Zn, Mn-Ga and Mn-Ge alloys exhibit antiferromagnetism below the transition temperature, a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fbdf58ea5a9f2b59ba36eb7c1af2effa
https://doi.org/10.1143/jpsj.31.436
https://doi.org/10.1143/jpsj.31.436
Publikováno v:
IEEE Transactions on Magnetics. 13:1181-1183
In the ion-implanted garnet films for hard bubble suppression, there exist planar closure domains associated with bubbles, which are created or annihilated by a rotating in-plane magnetic field. We have investigated the effects of closure domains on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d13ff738104615b2440643591c71c7c
https://doi.org/10.1109/tmag.1977.1059688
https://doi.org/10.1109/tmag.1977.1059688