Results 221 to 230 of about 1,083 (258)
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On-wafer measurement uncertainty for 3-terminal active millimetre-wave devices
GaAs IC Symposium Technical Digest 1992, 2003An experimentally derived frequency-dependent residual error budget to 60 GHz in well-calibrated state-of-the-art measurement systems for millimeter-wave devices is presented. The budget identifies errors resulting from the imperfections in the calibration standards, both on- and off-wafer, probe-wafer interface, and instrumentation.
P. Walters +4 more
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Millimetre-wave self-oscillating mixers using resonant tunnelling devices
23rd European Microwave Conference, 1993, 1993This paper reports an improved W-band self-oscillating mixer employing a resonant tunnelling diode. A conversion loss figure in the region of 25 dB has been obtained from a single device providing direct down-conversion from 87 GHz to 90 MHz. These devices offer the possibility of achieving conversion gain under suitable conditions.
G. Millington +5 more
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Micro and nano devices in passive millimetre wave imaging systems
SPIE Proceedings, 2013The impact of micro and nano technology on millimetre wave imaging from the post war years to the present day is reviewed. In the 1950s whisker contacted diodes in mixers and vacuum tubes were used to realise both radiometers and radars but required considerable skill to realise the performance needed.
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The microscopic Monte Carlo technique of the millimetre-wave unipolar devices simulation
12th International Conference on Microwaves and Radar. MIKON-98. Conference Proceedings (IEEE Cat. No.98EX195), 2002A new efficient method of the electron's wave vector calculation after its ionised impurity scattering is discussed in this paper. The accent has been put on the fact that the electron scattering on ionised impurities plays an important role in hot carrier diffusion noise of the millimetre-wave devices based on the highly doped gallium arsenide.
V. Yatskevich, V. Muravjev
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Use of evolutionary computing algorithms in the design of millimetre-wave metamaterial devices
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX, 2018The design of a mesh filter involves the selection of various grid patterns and their assembly into a multiple layer structure to meet the desired transfer characteristics. This can be a laborious process involving modelling tools and multiple iterations before a satisfactory solution is achieved.
Thompson J. A., Pisano G.
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A Planar Schottky-Diode Device for Millimetre-Wave Balanced Mixer Applications
21st European Microwave Conference, 1991, 1991A GaAs Schottky diode integrated circuit has been developed for use as the mixing element in a wideband balanced mixer. The chip consists of two monolithic diodes with low parasitics and their associated antenna coupling structure. The I-V characteristics of the diodes are equivalent to the best whiskered devices.
J.A. Wells, N.J. Cronin
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2006
Electron device modelling at very high frequencies needs, as a preliminary step, the identification of suitable parasitic elements mainly describing the passive structure used for accessing the intrinsic device. However, when dealing with device modelling at millimetre-wave frequencies conventional lumped parasitic networks necessarily become less ...
RESCA, DAVIDE +6 more
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Electron device modelling at very high frequencies needs, as a preliminary step, the identification of suitable parasitic elements mainly describing the passive structure used for accessing the intrinsic device. However, when dealing with device modelling at millimetre-wave frequencies conventional lumped parasitic networks necessarily become less ...
RESCA, DAVIDE +6 more
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International Journal of Infrared and Millimeter Waves, 2003
Variants are considered of palarizational frequency-selective multipath interference devices for millimetric- and submillimetric- wave receivers. Main expressions are presented that describe their characteristics. Advantages are pointed out of the devices as compared with Fabry-Perot interferometers when solving problems of received frequency-band ...
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Variants are considered of palarizational frequency-selective multipath interference devices for millimetric- and submillimetric- wave receivers. Main expressions are presented that describe their characteristics. Advantages are pointed out of the devices as compared with Fabry-Perot interferometers when solving problems of received frequency-band ...
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Silicate dielectric ceramics for millimetre wave applications
Journal of the European Ceramic Society, 2021Aleksander Gurlo +2 more
exaly
3D Printed Millimetre-Wave and Sub-Terahertz Devices: Prospects, Challenges, and Solutions
2022 16th European Conference on Antennas and Propagation (EuCAP), 2022Yang Yang +3 more
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