Zobrazeno 1 - 10
of 101
pro vyhledávání: '"Motoaki Hara"'
Autor:
Motoaki Hara, Yuichiro Yano, Yuki Takahashi, Toshio Nishizawa, Shinsuke Hara, Akifumi Kasamatsu, Masanori Ueda, Hiroyuki Ito, Tetsuya Ido
Publikováno v:
Electronics Letters, Vol 57, Iss 3, Pp 132-134 (2021)
Abstract An injection‐locked divider oscillator that converts a 6‐GHz‐band signal into a 3‐GHz‐band signal was developed. The injection‐locked divider oscillator was specifically designed to lock on the clock transition frequency of 87Rb
Externí odkaz:
https://doaj.org/article/30e637d74f6a449d9acad654bb8ff5c7
Publikováno v:
Journal of Advanced Mechanical Design, Systems, and Manufacturing, Vol 7, Iss 2, Pp 95-102 (2013)
This paper describes a micro cantilever integrated with a pyroelectric infrared detector for non-contact scanning thermal microscopy (SThM). Pb(Zr,Ti)O3 (PZT) was deposited on the cantilever tip with a sol-gel method as a pyroelectric sensor. An X-ra
Externí odkaz:
https://doaj.org/article/f2e32ee8b3af4fdc9265265488131053
FBAR Oscillator and MEMS Tunable VCSEL to Generate the Probe Lasers for Microfabricated Atomic Clock
Autor:
Motoaki Hara, Satoshi Shinada, Yuichiro Yano, Tetsuya Ido, Zhijian Zhao, Masaya Toda, Takahito Ono, Horoyuki Ito
Publikováno v:
2022 IEEE International Ultrasonics Symposium (IUS).
Autor:
Zhijan Zhao, Masaya Toda, Takahito Ono, Motoaki Hara, Satoshi Shinada, Hiroshi Nakagawa, Katsuya Kikuchi
Publikováno v:
2022 Smart Systems Integration (SSI).
Autor:
Hiroyuki Ito, Akifumi Kasamatsu, Shinsuke Hara, Yuki Takahashi, Toshio Nishizawa, Tetsuya Ido, Motoaki Hara, Masanori Ueda, Yuichiro Yano
Publikováno v:
Electronics Letters, Vol 57, Iss 3, Pp 132-134 (2021)
An injection‐locked divider oscillator that converts a 6‐GHz‐band signal into a 3‐GHz‐band signal was developed. The injection‐locked divider oscillator was specifically designed to lock on the clock transition frequency of 87Rb of 6.824
Publikováno v:
2021 IEEE International Ultrasonics Symposium (IUS).
Ultracompact and ultrastable clock chips are essential for beyond 5G/6G (b5G/6G) telecommunication systems, and we are studying 3-GHz-band thin-film bulk acoustic resonator (FBAR) oscillators for the development of such clock chips. Good frequency in
Publikováno v:
2021 21st International Conference on Solid-State Sensors, Actuators and Microsystems (Transducers).
We synthesized and evaluated rubidium azide as a new solid alkali metal source for microfabricated atomic clocks. A MEMS-based gas cell was filled with Rb as the alkali metal source for activation and a buffer gas (N 2 or Ar), and the frequency stabi
Autor:
Tetsuya Ido, Masaya Toda, Yuichiro Yano, Masatoshi Kajita, Takahito Ono, Hitoshi Nishino, Motoaki Hara
Publikováno v:
Optics letters. 46(10)
This Letter reports the design, fabrication, and evaluation of reflection-type planar vapor cells for chip-scale atomic clocks. The cell with 2–8 mm cavity length contains two 45° Bragg reflector mirrors assembled using a local anodic bonding. Coh
Publikováno v:
2020 IEEE International Ultrasonics Symposium (IUS).
We developed an injection-locking-type frequency-2-divider oscillator using a thin-film bulk acoustic resonator (FBAR) to achieve the ultrastabilization of frequency using the coherent population trapping (CPT) resonance of the 87Rb atom. When receiv
Autor:
Motoaki Hara
Publikováno v:
MEMS Resonator Filters ISBN: 9781785618963
The authors have introduced the operation principle and methods for improving the characteristics of SAW and BAW devices in this chapter. Among the various MEMS resonators, SAW and BAW devices have been among the most successfully commercialised fiel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::db85cacbdf0ada6c4ee9acee283027b6
https://doi.org/10.1049/pbcs065e_ch8
https://doi.org/10.1049/pbcs065e_ch8