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261 results on '"Shimaoka K"'

3. Bit error rate measurement of a high-speed small-voltage signal using a superconducting transmission line

Author

Shimaoka, K., Tokunaga, S., Nemoto, M., and Yoshida, I.

Subjects
Digital integrated circuits -- Research, High temperature superconductors -- Research, Superconductivity -- Research, Business, Electronics, Electronics and electrical industries
Abstract

Research describing a measuring system for the investigation of cryo-packaging technology for superconducting digital electronics is presented. The system is designed around a magnetically shielded wide band test fixture.

Published
2001

4. Application of a cryogenic vector network measuring technique in a high-speed digital test

Author

Shimaoka, K., Nemoto, M., Tokunaga, S., Yoshida, I., Fujimaki, A., and Hayakawa, H.

Subjects
Gold -- Research, Magnesium oxide -- Research, Microwave transmission lines -- Research, Strip transmission lines -- Research, Waveguides -- Research, Yttrium barium copper oxides -- Research, Business, Electronics, Electronics and electrical industries
Abstract

Research was conducted to examine the results of a digital transmission test of a YBa2Cu3Ox/MgO/Au microstrip line to coplanar waveguide transmission line converter. A further objective was to evaluate a digital transmission measuring system that includes the transmission line converter by an error performance analyzer. Results show that the transmission properties of the transmission line converter was almost the same as YBa2Cu3O(sub x)/MgO/Au microstrip line at frequencies from 40 MHz to 10 GHz at 30 K.

Published
1999

5. Tl2Ba2CaCu2Odelta thin films on MgO in a sealed capsule

Author

Nemoto, M., Toshikawa, S., Shimaoka, K., Niki, K., Yoshida, I., and Yoshisato, Y.

Subjects
Thin films -- Research, Dielectric devices -- Research, Business, Electronics, Electronics and electrical industries
Abstract

MgO features lower dielectric constant and smaller dielectric loss tangent than LaAlO3 making it more suitable for the preparation of high-quality c-axis oriented Tl2Va2CaCuOdelta thin films for high frequency applications. The thin films were annealed in a gold gasket-sealed alumina capsule. Results reveal that the structural properties of the thin films may be improved through the preannealing of the pellets for Tl compensation.

Published
1997

6. Impedance control of Tl2Ba2CaCu2Ox Josephson junctions on MgO substrates for millimeter wave sensing

Author

Yoshikawa, S., Nemoto, M., Shimaoka, K., Niki, K., Yoshida, I., and Yoshisato, Y.

Subjects
Josephson junction -- Research, Millimeter wave devices -- Research, Business, Electronics, Electronics and electrical industries
Abstract

Anisotropic Tl2Ba2CaCusOx thin films on MgO substrates were used to fabricate superconductor-normal conductor-superconductor-type step-edge Josephson junctions and superconductor-insulator-superconductor intrinsic stacked Josephson junctions. The normal resistance of the junctions were controlled to enhance their applicability to millimeter wave receivers. A fundamental mixing efficient intermediate frequency output of up to 95 K was demonstrated.

Published
1997

8. Fabrication and properties of Nb/MgO/Bi2Sr2CaCu2Ox tunel junctions using crystalline and amorphous MgO films grown by the MBE method

Author

Yamano, K., Shimaoka, K., Takahashi, K., Usuki, T., Yoshisato, Y., and Nakano, S.

Subjects
Superconductive devices -- Research, Thin films -- Research, Epitaxy -- Analysis, Business, Electronics, Electronics and electrical industries
Abstract

The properties of Nb/MgO/BSCCO junctions with crystalline- and amorphous-MgO barriers grown by molecular beam epitaxy were studied. The differential conductance for the junctions were calculated as a function of the measured voltage obtained from the the current-voltage curve. Variations in the superconductor-insulator and superconductor-normal metal interfaces were also analyzed in terms of the proximity effect. Results show that the clear gap structure and energy differences in the junctions are caused by the proximity effect and the variations in the BSCCO surface conductivity, respectively.

Published
1993

11. Abstracts of the Nineteenth Annual Meeting of the Japanese Society of Biometeorology, Hamamatsu, 28–29 November 1980

Author

Okuwaki, Y., Iwami, K., Kikuchi, M., Fujita, K., Sawada, S., Yamamoto, S., Sudo, A., Murakami, N., Mohri, M., Nagasaka, T., Shibata, H., Hirata, K., Yurugi, R., Kondo, Y., Moriya, K., Hiroshige, T., Kurahashi, M., Kuroshima, A., Yahata, T., Doi, K., Harimura, Y., Tochihara, Y., Ohnaka, T., Matsui, J., Tanaka, M., Yoshida, K., Mayuzumi, M., Tanaka, N., Tsujita, J., Hori, S., Morimoto, T., Miki, K., Nose, H., Yamada, S., Ohara, K., Okuda, N., Sato, H., Isobe, Y., Hasegawa, Y., Miyagawa, T., Ogawa, T., Asayama, M., Sugenoya, J., Matsui, R., Igawa, S., Kashimura, O., Nakai, S., Kita, H., Ueda, G., Takeoka, M., Koshihara, Y., Tsuchiya, K., Ohwatari, N., Kosaka, M., Nagai, M., Iriki, M., Pleschka, K., Kiyohara, T., Hori, T., Nakashima, T., Shibata, M., Osaka, T., Sugano, T., Araki, T., Namihira, G., Nagata, H., Ishigure, K., Shimaoka, K., Mori, S., Hara, M., Shinohara, T., Nagao, Y., Okabe, N., Hamaguchi, K., Sasaki, T., Komori, A., Saito, S., Sakai, A., Yoshimura, K., Fukushima, M., Kubo, K., Kobayashi, T., Shimizu, N., Minamino, O., Naruse, T., Isoda, N., Kamiyama, K., Midorikawa, T. T., Niwa, K., Nakayama, T., Agishi, Y., Yamaoka, S., Yamasaki, M., Momiyama, M., Tajima, Y., Katayama, K., Nakamura, Y., Matsubara, N., Kimura, T., Shimura, M., and Miura, T.

Published
1982
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15. 2-axis MEMS scanner for a laser range finder

Author

Aoyagi, I., primary, Shimaoka, K., additional, Kato, S., additional, Makishi, W., additional, Kawai, Y., additional, Tanaka, S., additional, Ono, T., additional, Esashi, M., additional, and Hane, K., additional

Published
2011
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