Engineering topics
Publications and source records attributed to Weinreb, S..
This paper will propose one vision for an interstellar program. It will include a discussion of mission concepts as well as technological requirements for accomplishing those missions.
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Monolithic (MMIC) and discrete transistor (MIC) low noise amplifiers are compared on the basis of performance, cost, and reliability. The need for cryogenic LNA's for future large microwave arrays for radio astronomy is briefly discussed and data is presented on a prototype LNA for the 1 to 10 GZH range along with a very wideband LNA for the 1 to 60 GHz range.
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This paper presents some recently developed MMICs based on a 0.1 meu gate-length InAlAs/InGaAs/InP HEMT process with an fmax above 600 GHz.
The Heterodyne Instrument (HIFI) for the Far-Infrared and Sub-millimeter Telescope (FIRST) requires local oscillators well into the terahertz frequency range.
This paper describe a millimeter wave low noise amplifier with extraordinary low noise, low consumption, and wide frequency range. These results are achieved utilizing state-of-the-art InP HEMT transistors coupled with CPW circuit design. The paper describes the transistor models, modeled and measured on-wafer and in-module results at both 300K am 24K operating temperatures for many samples of the device.
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This paper describes a millimeter wave low noise amplifier with extraordinary low noise, low power consumption, and wide frequency range.
We present results of developments of low noise millimeter wave receivers for space applications utilizing InP HEMT monolithic microwave integrated circuts (MMICs).
The gradual depletion of the Earth's stratospheric ozone and the regular appearance of deep ozone 'hole' over the polar regions has dramatic ramifications for our planet
An overview (in outline form) of cryogenically cooled, low noise microwave receivers is presented. Included are the following: (1) a state of the art summary; (2) cooled GaAs FET devices; (3) examples of cooled microwave amplifiers; (4) cooling technology; and (5) recommendations for research and development.
High resolution microwave spectra of hydrogen and hydroxyl absorption lines of cassiopeia a
Microwave detection of hydroxyl radical in interstellar medium
Radio observation of hydroxyl radical in absorption spectrum of cassiopeia a