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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| EST, MW, EMT, OPE, MWPTHz, IEE-EMT [detail] | 2023-07-21 09:35 |
Hokkaido | Muroran Institute of Technology (Primary: On-site, Secondary: Online) |
Design and Optimization of Nine-Section Broadband Quadrature Hybrid Coupler Using Strip Line Structure Taiyo Ushiyama, Tsuyoshi Narita, Sayu Tomioka, Satoshi Ono (UEC), Sho Masui, Takafumi Kojima (NAOJ), Takeshi Sakai (UEC)  EMT2023-50 MW2023-68 OPE2023-50 EST2023-50 MWPTHz2023-46 |
To upgrade the IF bandwidth of radio telescopes, we are developing a broadband quadrature hybrid coupler using strip lin... [more] | EMT2023-50 MW2023-68 OPE2023-50 EST2023-50 MWPTHz2023-46 pp.208-213 |
| MW | 2022-06-09 14:00 |
Nagano | Naganoken Nokyo Building (Primary: On-site, Secondary: Online) |
Design and fabrication of stripline type of quadrature hybrid couplers for 3 to 21 GHz band Satoshi Ono, Tsuyoshi Narita (UEC), Sho Masui (OPU/NAOJ), Takafumi Kojima (NAOJ), Takeshi Sakai (UEC) MW2022-24 |
In this study, design and fabrication of broadband quadrature hybrid couplers are shown. Broadside Stripline type of cou... [more] | MW2022-24 pp.7-12 |
| MW, ED | 2019-01-17 13:50 |
Tokyo | Hitachi, Central Research Lab. | [Special Talk]
Study on SIS mixer and Waveguide Technologies for Wideband and Low-noise Receivers at Submillimeter Wavelengths Takafumi Kojima (NAOJ) ED2018-74 MW2018-141 |
In recent years, receivers based on superconductor-insulator-superconductor (SIS) mixers at millimeter/submillimeter wav... [more] | ED2018-74 MW2018-141 pp.31-36 |
| SCE | 2015-10-09 11:55 |
Miyagi | Tohoku Univ. | Evaluation and Analysis of Nb/Al/AlOx/Al/Nb Junctions Mizuki Ikeya (UEC), Takafumi Kojima, Noguchi Takashi (NAOJ), Takeshi Sakai (UEC) SCE2015-34 |
We are developing an ultra-wideband receiver for upgrading ALMA (Atacama Large Millimeter/submillimeter Array) receivers... [more] | SCE2015-34 pp.75-79 |
| SCE | 2015-01-22 10:15 |
Tokyo | Kikaishinkou-kaikan | Evaluation of kinetic-inductance nonlinearity in single-crystal NbTiN-based coplanar waveguide Masanori Takeda (Shizuoka Univ.), Takafumi Kojima (NAOJ), Atsushi Saito (Yamagata Univ.), Kazumasa Makise, Yoshinori Uzawa, Shingo Saito (NICT), Hisashi Shimakage (Ibaraki Univ.) SCE2014-50 |
We have developed a kinetic inductance traveling-wave amplifier. In this paper, we discuss on a nonlinear kinetic induct... [more] | SCE2014-50 pp.7-12 |
| SCE | 2014-10-16 10:15 |
Miyagi | Tohoku University, RIEC | Development of Dielectric X-ray Microcalorimeter Masatoshi Hoshino, Takahiro Kikuchi, Norio Sekiya, Kazuhiro Sakai, Noriko Y. Yamasaki, Kazuhisa Mitsuda (JAXA), Kosuke Sato (TUS), Kyosuke Maehata (Kyushu Univ.), Takafumi Kojima (NAOJ) SCE2014-43 |
Observational targets of X-ray astronomy are wide-ranging; from planets to super clusters of galaxies. For future X-ray ... [more] | SCE2014-43 pp.49-52 |
| SCE | 2008-07-24 14:15 |
Tokyo | Kikai-Shinko-Kaikan Bldg | A novel THz SIS mixer with a NbTiN-groundplane and SIS micro-trylayers directly grown on a quartz substrate Akira Endo (Univ. of Tokyo, NAOJ, JSPS Research Fellow), Takashi Noguchi, Matthias Kroug, Sergey V. Shitov (NAOJ), Shan Wenlei (PMO), Tomonori Tamura (NAOJ), Takafumi Kojima (Osaka Pref. Univ.), Yoshinori Uzawa, Takeshi Sakai (NAOJ), Hirofumi Inoue (Univ. of TokyoNAOJ), Kotaro Kohno (Univ. of Tokyo) SCE2008-17 |
A new structure and fabrication process for multi-material THz-SIS mixers is proposed. In this design, both the micromet... [more] | SCE2008-17 pp.13-18 |
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