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Shein, K. V.; Zarudneva, A. A.; Emel’yanova, V. O.; Logunova, M. A.; Chichkov, V. I.; Sobolev, A.S.; Zav’yalov, V. V.; Lehtinen, J. S.; Smirnov, E. O.; Korneeva, Y. P.; Korneev, A. A.; Arutyunov, K. Y. |
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Title |
Superconducting microstructures with high impedance |
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Journal Article |
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2020 |
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Phys. Solid State |
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Phys. Solid State |
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62 |
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9 |
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1539-1542 |
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superconducting channels, SIS, inetic inductance, tunneling contacts, high impedance |
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The transport properties of two types of quasi-one-dimensional superconducting microstructures were investigated at ultra-low temperatures: the narrow channels close-packed in the shape of meander, and the chains of tunneling contacts “superconductor-insulator-superconductor.” Both types of the microstructures demonstrated high value of high-frequency impedance and-or the dynamic resistance. The study opens up potential for using of such structures as current stabilizing elements with zero dissipation. |
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1063-7834 |
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1789 |
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Hirata, A.; Harada, M.; Nagatsuma, T. |
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120-GHz wireless link using photonic techniques for generation, modulation, and emission of millimeter-wave signals |
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2003 |
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J. of Lightwave Technology |
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21 |
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10 |
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2145-2153 |
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subterahartz terahertz THz communications |
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We present a wireless link system that uses millimeter-wave (MMW) photonic techniques. The photonic transmitter in the wireless link consists of an optical 120-GHz MMW generator, an optical modulator, and a high-power photonic MMW emitter. A uni-traveling carrier photodiode (UTC-PD) was used as the photonic emitter in order to eliminate electronic MMW amplifiers. We evaluated the dependence of UTC-PD output power on its transit-time limited bandwidth and its CR-time constant limited bandwidth, and employed a UTC-PD with the highest output power for the photonic emitter. As for the MMW generation, we developed a 120-GHz optical MMW generator that generates a pulse train and one that generates a sinusoidal signal. The UTC-PD output power generated by a narrow pulse train was higher than that generated by sinusoidal signals under the same average optical power condition, which contributes to reducing the photocurrent of the photonic emitter. We have experimentally demonstrated that the photonic transmitter can transmit data at up to 3.0 Gb/s. The wireless link using the photonic transmitter can be applied to optical gigabit Ethernet signals. |
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592 |
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Nagatsuma, T.; Hirata, A.; Sato, Y.; Yamaguchi, R.; Takahashi, H.; Kosugi, T.; Tokumitsu, M.; Sugahara, H.; Furuta, T.; Ito, H. |
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Title |
Sub-Terahertz Wireless Communications Technologies |
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2005 |
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Proc. 18th International Conference on Applied Electromagnetics and Communications (ICECom 2005) |
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1-4 |
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subterahartz terahertz THz communications |
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This paper presents a 10-Gb/s wireless link system that uses a 120-GHz-band sub-terahertz electro-magnetic waves. In the transmitter, photonic techniques are used for generation, modulation, and emission of the sub-THz signals, while the receiver is composed of all-electronic devices using InP-HEMTs. |
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593 |
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Boyarskii, D. A.; Gershenzon, V. E.; Gershenzon, E. M.; Gol'tsman, G. N.; Ptitsina, N. G.; Tikhonov, V. V.; Chulkova, G. M. |
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On the possibility of determining the microstructural parameters of an oil-bearing layer from radiophysical measurement data |
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1996 |
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J. of Communications Technology and Electronics |
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J. of Communications Technology and Electronics |
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41 |
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5 |
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408-414 |
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submillimeter waves, transmission |
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A method for the reconstruction of microstructural properties of an oil-bearing rock from the spectral dependence of the transmission factor of submillimeter waves is proposed. |
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1064-2269 |
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Радиотехника и электроника 41, no. 4 (1996): 441-447 |
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1611 |
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Казаков, А. Ю.; Селиверстов, С. В.; Дивочий, А. В.; Смирнов, К. В.; Финкель, М. И.; Вахтомин, Ю. Б. |
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Возможность применения сверхпроводниковых материалов в качестве отражающего покрытия зеркала телескопа, предназначенного для наблюдений анизотропии реликтового излучения |
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2012 |
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Преподаватель ХХI век |
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3 |
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221-224 |
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submillimeter radio telescope |
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В статье исследуется возможность использования сверхпроводящего материала в качестве отражающего слоя зеркала субмиллиметрового телескопа, охлажденного до криогенных температур и предназначенного для наблюдений реликтового излучения. Для нескольких сверхпроводниковых материалов вычислен диапазон частот, в котором флуктуации теплового излучения покрытия меньше флуктуаций источника. Показана перспективность применения покрытия из Nb3Ge. |
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1820 |
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