Zobrazeno 1 - 10
of 39
pro vyhledávání: '"Masayoshi, Koshino"'
Autor:
Takanori Toi, Toshiyuki Fuyutsume, Hideki Iwamoto, Tsutomu Takai, Takeshi Nakao, Yuichi Takamine, Masahiro Hiramoto, Masayoshi Koshino
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. 66:1006-1013
In response to the increased mobile data traffic, there is a growing need for more low-loss RF band filters with steep frequency characteristics, and high-quality ( $Q$ )-factor and low-temperature coefficient of frequency (TCF) resonators are requir
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a8522d78b86dd10521d77a3145cdbfaa
https://doi.org/10.1109/tuffc.2019.2898046
https://doi.org/10.1109/tuffc.2019.2898046
Autor:
Yuichi Takamine, Masahiro Hiramoto, Masayoshi Koshino, Takanori Toi, Toshiyuki Fuyutsume, Hisashi Yamazaki, Hideki Iwamoto, Haruki Kyoya, Norio Nakajima, Tsutomu Takai, Takeshi Nakao, Hajime Kando
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. 64:1382-1389
To develop the high-performance filters and duplexers required for recent long-term evolution frequency bands in mobile handsets, a surface acoustic wave (SAW) resonator is needed that has a higher quality (Q) and a lower temperature coefficient of f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aad2e50338a4b5a3f5b702b1ae80d19a
https://doi.org/10.1109/tuffc.2017.2738119
https://doi.org/10.1109/tuffc.2017.2738119
Autor:
Yoshiaki Hasegawa, Toshiro Hiratsuka, Kaoru Sudo, Hisao Hayafuji, Kengo Onaka, Masayoshi Koshino, Yoshiki Yamada, Keiichi Hirose, Ryo Komura
Publikováno v:
2019 IEEE Asia-Pacific Microwave Conference (APMC).
This paper presents an Antenna-Array-Integrated Module (AiM) with a low pass filter (LPF) in LTCC multilayered substrate with low loss, high attenuation and small size in 28 GHz band. A differential feeding method for each patch antenna is employed t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4a2801423db15cb17c52b2ba3fcf2cd5
https://doi.org/10.1109/apmc46564.2019.9038218
https://doi.org/10.1109/apmc46564.2019.9038218
Autor:
Kei Matsutani, Hiroshi Kojima, Kengo Onaka, Takanori Toi, Manabu Nakahori, Masayoshi Koshino, Katsuhito Kuroda
Publikováno v:
2019 IEEE MTT-S International Microwave Symposium (IMS).
A miniaturized 28 GHz quartz waveguide bandpass filter using a double-folded structure has been developed. The double-folded structure is used for a footprint reduction less than half of a current single-folded quartz waveguide filter. Some analyses
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::96ea7c6a31fbaa43f5ad86f3c8b59702
https://doi.org/10.1109/mwsym.2019.8701052
https://doi.org/10.1109/mwsym.2019.8701052
Autor:
Tsutomu, Takai, Hideki, Iwamoto, Yuichi, Takamine, Toshiyuki, Fuyutsume, Takeshi, Nakao, Masahiro, Hiramoto, Takanori, Toi, Masayoshi, Koshino
Publikováno v:
IEEE transactions on ultrasonics, ferroelectrics, and frequency control. 66(5)
In response to the increased mobile data traffic, there is a growing need for more low-loss RF band filters with steep frequency characteristics, and high-quality ( Q )-factor and low-temperature coefficient of frequency (TCF) resonators are required
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::4b579ea25b068eddb66d71d2f4eec581
https://pubmed.ncbi.nlm.nih.gov/30735992
https://pubmed.ncbi.nlm.nih.gov/30735992
Publikováno v:
2018 Asia-Pacific Microwave Conference (APMC).
Regarding higher frequency above 3 GHz, up until now BAW filters have been believed to be better solution than SAW filters due to their increase of electrodes resistance. This paper describes a new high performance SAW filter surpassing BAW, with 3.5
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::432d0b9eb71a99cd1711f28325f62666
https://doi.org/10.23919/apmc.2018.8617381
https://doi.org/10.23919/apmc.2018.8617381
Autor:
Tsutomu Takai, Hideki Iwamoto, Takeshi Nakao, Masayoshi Koshino, Yuichi Takamine, Toshiyuki Fuyutsume
Publikováno v:
2018 IEEE International Ultrasonics Symposium (IUS).
We discuss transverse modes in a resonator on a multilayer substrate with a thin piezoelectric plate. A generation mechanism of the transverse mode response in I.H.P. SAW (Incredible High-Performance SAW)resonator with a LiTa03 plate is analyzed by u
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4913b25494102ca543ea3992c62f8318
https://doi.org/10.1109/ultsym.2018.8580175
https://doi.org/10.1109/ultsym.2018.8580175
Autor:
Toshiyuki Fuyutsume, Yuichi Takamine, Tsutomu Takai, Hideki Iwamoto, Masahiro Hiramoto, Takanori Toi, Masayoshi Koshino, Takeshi Nakao
Publikováno v:
2017 IEEE International Ultrasonics Symposium (IUS).
Various characteristics for RF filters in mobile terminals are required corresponding to expansion of mobile terminals. I.H.P. SAW (Incredible High-performance SAW) with high Q and temperature stability has been developed to resolve these challenges.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::674f4ac4a5f9921c3b3bd0bf7a277822
https://doi.org/10.1109/ultsym.2017.8091876
https://doi.org/10.1109/ultsym.2017.8091876
Autor:
Tsutomu, Takai, Hideki, Iwamoto, Yuichi, Takamine, Hisashi, Yamazaki, Toshiyuki, Fuyutsume, Haruki, Kyoya, Takeshi, Nakao, Hajime, Kando, Masahiro, Hiramoto, Takanori, Toi, Masayoshi, Koshino, Norio, Nakajima
Publikováno v:
IEEE transactions on ultrasonics, ferroelectrics, and frequency control. 64(9)
To develop the high-performance filters and duplexers required for recent long-term evolution frequency bands in mobile handsets, a surface acoustic wave (SAW) resonator is needed that has a higher quality (Q) and a lower temperature coefficient of f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::7140a8d4ed7f6b595fc305d54fbdca71
https://pubmed.ncbi.nlm.nih.gov/28809680
https://pubmed.ncbi.nlm.nih.gov/28809680
Autor:
Norio Nakajima, Kei Matsutani, Hiroshi Kojima, Atsushi Horita, Masayoshi Koshino, Makata Kawashima, Takaya Wada, Kengo Onaka
Publikováno v:
2017 IEEE MTT-S International Microwave Symposium (IMS).
Massive MIMO technology and mm-wave band radio communication are effective solution of a high data rate for 5G. This paper presents a novel 28GHz wideband filter for those antenna units. To realize a wide fractional bandwidth of 10%, a new terminal c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e303fa5cfa73ab9f16ebf50da548fba5
https://doi.org/10.1109/mwsym.2017.8058898
https://doi.org/10.1109/mwsym.2017.8058898