Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Osamu Kawachi"'
Publikováno v:
2016 IEEE MTT-S International Microwave Symposium (IMS).
Requirements for radio frequency (RF) devices in mobile phones have been getting more stringent, especially in multiband / carrier aggregation systems constructing many RF components. In this paper, we discuss two important items for RF acoustic devi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::31d06959f5398f1dccec547ec9140e0b
https://doi.org/10.1109/mwsym.2016.7540216
https://doi.org/10.1109/mwsym.2016.7540216
Publikováno v:
Journal of Japan Institute of Electronics Packaging. 14:351-354
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::11e7f0b4aa8929df417c8711ab8cfda4
https://doi.org/10.5104/jiep.14.351
https://doi.org/10.5104/jiep.14.351
Autor:
Jiguo Wen, Tatsuya Omori, Osamu Kawachi, Ken-ya Hashimoto, Masatsune Yamaguchi, Masanori Ueda
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 53:1912-1917
This paper proposes a simple technique to suppress the reflection coefficients S11 and S22 of surface acoustic wave (SAW) filters. Two identical SAW filters are sandwiched in between two quadrature hybrids, where their two ports are used as input and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::842387b774f0330319ed20bcba35545c
https://doi.org/10.1109/tuffc.2006.124
https://doi.org/10.1109/tuffc.2006.124
Publikováno v:
Journal of Japan Institute of Electronics Packaging. 6:555-559
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f2e57bba3da5b78f13e4acd3157d90bc
https://doi.org/10.5104/jiep.6.555
https://doi.org/10.5104/jiep.6.555
Publikováno v:
2013 IEEE International Ultrasonics Symposium (IUS).
We have proposed surface acoustic wave (SAW) duplexer for CDMA/LTE markets. Advancements of the communication system are progressing in accordance with the increase of the data user needs. Technology that uses multi-band and simultaneous communicatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eada70a00cdae85369c09ecbc75849af
https://doi.org/10.1109/ultsym.2013.0190
https://doi.org/10.1109/ultsym.2013.0190
Publikováno v:
2012 IEEE International Ultrasonics Symposium.
We have proposed the use of a lithium tantalate (LiTaO3)/sapphire bonded substrate for compensation of temperature coefficient of frequency (TCF) in surface acoustic wave (SAW) duplexers. However, in the specific use case of a Band 8 SAW duplexer on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9166dc602451eb1879200f980e505bce
https://doi.org/10.1109/ultsym.2012.0314
https://doi.org/10.1109/ultsym.2012.0314
Autor:
Satoru Matsuda, T. Nishizawa, Michio Miura, Y. Satoh, Masanori Ueda, Osamu Kawachi, T. Takahashi, Takashi Matsuda
Publikováno v:
2012 IEEE International Ultrasonics Symposium.
In this paper, a novel Love wave device which has Al2O3 under layer structure is proposed. Al2O3 under layer structure enables us to adjust the electromechanical coupling factor k2 of Love wave. As a result, a suitable k2 for Band3 Duplexer of about
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8845958e5c661d8dc6832097d1ca4f18
https://doi.org/10.1109/ultsym.2012.0315
https://doi.org/10.1109/ultsym.2012.0315
Publikováno v:
2009 IEEE International Ultrasonics Symposium.
This paper presents the realization of Duplexer with small size, high reliability and excellent performance. Good heat radiation, hermetic performance and small frequency drift against temperature shift are essential to achieve small size and highly
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7fbd472429ced41d4afc5b5598d6eef1
https://doi.org/10.1109/ultsym.2009.5441641
https://doi.org/10.1109/ultsym.2009.5441641
Publikováno v:
2009 IEEE International Ultrasonics Symposium.
In the cellular market, the demand for miniaturization becomes more severe year by year. The introduction of multiband and multimode systems has accelerated the need for further miniaturization of RF components. For SAW devices in the RF module funct
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::589c3b446b8df153c52efe1b4c3615e4
https://doi.org/10.1109/ultsym.2009.5441674
https://doi.org/10.1109/ultsym.2009.5441674
Publikováno v:
ChemInform. 40
6-Hydroxymethyl-7,8,10-trimethoxy-2,6-dimethyl-3,6,11,11a-tetrahydro-2H-pyrazino[1,2-b]isoquinoline-1,4-dione (10) was prepared stereoselectively by Pictet-Spengler-type cyclization of the O,N-acetal of 3-arylmethylpiperazine-2,5-dione (8) in high yi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c6bc2beee1a7518af1f374e73ede7077
https://doi.org/10.1002/chin.200918159
https://doi.org/10.1002/chin.200918159