Results 221 to 230 of about 6,979 (259)
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Millimeter wave superconducting devices
AIP Conference Proceedings, 1978Significant progress has been made during the past two years in the development of millimeter wave superconducting devices. The present status of bolometric detectors and mixers, Josephsonâeffect mixers, quasiparticle mixers, and Josephsonâeffect parametric amplifiers will be reviewed.
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Millimeter-wave region optical devices
International Topical Meeting on Microwave Photonics. MWP '96 Technical Digest. Satellite Workshop (Cat. No.96TH8153), 2002This paper describes ultra-high-speed optical-device structures and characteristics of Mach-Zehnder waveguide LiNbO/sub 3/ modulators, electroabsorption MQW semiconductor modulators, and edge-coupled photodetectors.
O. Mitomi, K. Wakita, K. Kato
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Optically Controlled Millimeter-Wave Devices
SPIE Proceedings, 1984A dynamic bridge method has been developed to measure the time varying phase shift and attenuation of millimeter-waves in semiconductor waveguides when perturbed by optically induced plasmas. The resolution of this technique is 2 ns in real time. Comparison of this method with a theoretical model is also discussed.
A. M. Vaucher +3 more
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Millimeter Wave Solid State Devices
MRS Proceedings, 2000ABSTRACTExamples of novel solid state devices are presented, together with descriptions of their applicability to the diagnosis of laboratory, processing and fusion plasmas. GaAs varactor diodes can be arranged in large monolithic grid arrays, forming millimeter wave frequency multiplier based sources and high speed switches, or embedded in ...
Steven A. Rosenau +10 more
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Symmetry And Periodicity For Millimeter Wave Devices
SPIE Proceedings, 1988Symmetry and periodicity is discussed as it pertains to wave propagation, with particular emphasis on Floquet's theorem and Bloch's theorem. Floquet's theorem in three dimensions is applied to a circular waveguide with screw periodicity. The resulting dispersion characteristics of the uncoupled modes are compared to those of a normal circular waveguide.
W. N. Cain, R. W. Grow
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Millimeter-Wave GaN Device Modeling for Power Amplifiers
2020 Device Research Conference (DRC), 2020Millimeter-wave (mm-wave) applications such as the satellite communication (Sat-com) system and the fifth-generation (5G) mobile communication system have attracted a great deal of attention. In the mm-wave applications, a GaN device which can obtain high power at mm-wave band is considered as one of the promising device for power amplifiers (PA) as ...
Yutaro Yamaguchi 0002 +3 more
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Millimeter-Wave Relativistic Electron Devices
Radiophysics and Quantum Electronics, 2003We briefly review advances and new ideas in the field of obtaining superpowerful coherent millimeter-wave radiation. Devices based on the stimulated bremsstrahlung and the Cherenkov radiation of curved and rectilinear relativistic electron beams, respectively, are considered, in particular, gyrodevices (including traditional gyrotrons, large-orbit ...
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Novel Devices for (Sub)millimeter-Wave Space Applications
IEICE Transactions on Electronics, 2006Submillimeter-wave space applications require special components for power generation, detection and multiplication. This article presents recent progress in three various solid-state device technologies for submillimeter-wave space instruments: the InP HEMT for ultra-low noise detection at very low power in the IF amplifier, the heterostructure ...
Jan V. Grahn +3 more
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Arterial Pulse Measurement with Wearable Millimeter Wave Device
2019 IEEE 16th International Conference on Wearable and Implantable Body Sensor Networks (BSN), 2019Wearable monitors for measuring vital signs such as blood pressure will greatly impact the medical field. This work presents a millimeter-wave, radar-based system for performing accurate measurements of arterial pulse waveforms. Electromagnetic and radar-system simulation models are utilized to demonstrate the viability of this approach.
Jessi E. Johnson, Chris Kim, Oliver Shay
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Advanced microwave and millimeter-wave devices
2023A contribution to the design of advanced microwave and millimeterwave devices is presented hereafter. Both steps, design and measurement, have been considered in this thesis. For example, a new theory to design asymmetric devices has been developed and proved. It has been presented as a way of reducing the number of devices in a system.
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