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We present an overview of research on integrated diode circuits for terahertz applications carried out at Chalmers University of Technology. This includes progress on heterogeneous integration of heterostructure barrier varactor multipliers on silicon substrates. The described technology uses silicon-on-insulator (SOI) substrates, for which accurate and well-defined substrate thickness for the microstrip...
We present the progress of the technological development of a full e-beam based monolithically integrated Schottky diode process applicable for sub-millimetre wave multipliers and mixers. Evaluation of the process has been done in a number of demonstrators showing state-of-the-art performance, including various multiplier circuits up to 200 GHz with a measured flange efficiency of above 35%, as well...
We present the development of integrated submillimeter wave receivers and transmitters based on Schottky- and HBV-diode technology at Chalmers University of technology.
In many applications, it is desirable to integrate a power switch with an antiparallel diode on the same chip. In this letter, the monolithic integration of a silicon carbide vertical junction field-effect transistor (VJFET) with a junction barrier Schottky (JBS) diode is achieved, and the device is characterized at high voltage. The fabrication process involves no additional steps to that of the...
Spreading resistance of a planar Schottky diode is studied as a function of the frequency and buffer layer thickness. The study shows an increase of effective high frequency resistance for a buffer layer thicker than skin depth, due to the parasitic capacitances induced current in buffer layer.
This paper presents the optimization and design of a low-loss fixed-tuned 215-235-GHz sub-harmonic mixer, pumped by planar GaAs Schottky diodes fabricated by European company for space-borne radiometers. The circuits are fully integrated with the RF/IF filter and flip-chipped onto a suspended quartz-based substrate. The GaAs Gunn oscillator is used as the local-oscillator (LO) and this paper also...
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