Takafumi Kojima - Concepedia

Author

Takafumi Kojima

National Astronomical Observatory of Japan ORCID

Also Known As

Kojima, Takafumi, Kojma, Takafumi, T Kojima, T. Kojima, Takafumi KOJIMA, Takafumi Kojima, Victor Belitsky

137

Publications

728

Citations

H-Index

Concepts

All Affiliations

National Astronomical Observatory of Japan National Institute of Information and Communications Technology The Graduate University for Advanced Studies, SOKENDAI Purple Mountain Observatory Osaka Prefecture University

About

Takafumi Kojima is an author at National Astronomical Observatory of Japan specializing in engineering, antenna, and electromagnetic compatibility.

Top Concepts

#	Concept	H-Index	Publications	Citations
1	Engineering	15	19	456
2	Applied Physics	8	8	175
3	Electrical Engineering	8	8	146
4	Education	1	1	23
5	Computer Engineering	1	1	13

Takafumi Kojima

Publications

554

Citations

H-Index

Page 1

	Year	Citations
Design and Development of a Hybrid-Coupled Waveguide Multiplexer for a Multiband Receiver Takafumi Kojima, Álvaro González, Shin’ichiro Asayama, IEEE Transactions on Terahertz Science and Technology Millimeter Wave TechnologyEngineeringMultiplexingHybrid-coupled Waveguide MultiplexerMicrowave Transmission	2016	52
275–500 GHz Waveguide Diplexer to Combine Local Oscillators for Different Frequency Bands Álvaro González, Takafumi Kojima, Keiko Kaneko, IEEE Transactions on Terahertz Science and Technology Ghz Waveguide DiplexerDifferent Frequency BandsEngineeringOscillatorsLocal Oscillator	2017	52
Terahertz Corrugated Horns (1.25<formula> <tex>${\hbox{--}}$</tex> </formula>1.57 THz): Design, Gaussian Modeling, and Measurements Álvaro González, Keiko Kaneko, Takafumi Kojima, IEEE Transactions on Terahertz Science and Technology Thz PhotonicsPhotonicsGaussian ModelingEngineeringPhysics	2016	48
Development and testing of Band 10 receivers for the ALMA project Yoshinori Uzawa, Yasunori Fujii, Álvaro González, Physica C Superconductivity EngineeringRadio EngineeringRadio FrequencyAntennaInstrumentation	2013	26
Three Quanta Sensitivity Superconductor–Insulator–Superconductor Mixer for the 0.78–0.95 THz Band Takafumi Kojima, M. Kroug, Masanori Takeda, Applied Physics Express Thz PhotonicsTerahertz DevicesTerahertz TechnologyEngineeringSuperconducting Material	2009	25
Tuning Circuit Material for Mass-Produced Terahertz SIS Receivers Yoshinori Uzawa, Yasunori Fujii, Álvaro González, IEEE Transactions on Applied Superconductivity EngineeringMicrowave TransmissionTerahertz PhotonicsElectromagnetic CompatibilityFrequency Band	2014	24
Performance and Characterization of a Wide IF SIS-Mixer-Preamplifier Module Employing High-J c SIS Junctions Takafumi Kojima, M. Kroug, Kazunori Uemizu, IEEE Transactions on Terahertz Science and Technology Electrical EngineeringDetailed CharacterizationEngineeringRf SemiconductorHigh-frequency Device	2017	24
SIS Mixer Fabrication for ALMA Band10 M. Kroug, Akira Endo, Takuya Tamura, IEEE Transactions on Applied Superconductivity EngineeringRadio FrequencyMicrowave TransmissionSis Mixer FabricationIntegrated Circuits	2009	23
Reconfigurable Near-Field Beam Pattern Measurement System From 0.03 to 1.6 THz Álvaro González, Yasunori Fujii, Takafumi Kojima, IEEE Transactions on Terahertz Science and Technology Thz PhotonicsPhase MeasurementsEngineeringFar-field MeasurementRadio Frequency	2016	23
275–500-GHz Wideband Waveguide SIS Mixers Takafumi Kojima, M. Kroug, Álvaro González, IEEE Transactions on Terahertz Science and Technology Waveguide ProbeEngineeringRadio FrequencyMicrowave TransmissionAntenna	2018	21

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