Low-noise receivers.
Parametric amplifier and maser used to provide low-noise receivers in a space communication system
MASER↗
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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Post-amplifier noise temperature contribution in a low-noise receiving system.
Post-amplifier noise temperature contribution in low-noise receiving system
NOISE↗
Development of a low-noise, cold-cathode traveling-wave tube monthly progress report no. 3, 31 oct. - 30 nov. 1964
Cold cathode for installation as electron beam source in ultralow noise traveling wave tube
TRAVELING WAVE TUBE↗
Low-noise amplifiers
Low noise amplifiers - millimeter wave circuits and waveguide microwave termination
AMPLIFIER↗
A low-noise transistorized seismic amplifier
Transistor low noise seismic amplifier for fractional mv signals at ELF in ocean bottom seismographs and magnetic variometer
TRANSISTOR AMPLIFIER↗
Noise spectrum properties of low-noise microwave tube and solid-state signal sources
Noise spectrum properties of low noise microwave tube and solid state signal sources
MICROWAVE TUBE↗
A solid-state low-noise preamplifier
Solid state low noise preamplifier for particle detector of electrostatic accelerator system
ELECTROSTATIC GENERATOR↗
Cold cathodes for low-noise TWT applications Final report
Hot-electron surface barrier cathode for application to low-level traveling wave tube
COLD CATHODE↗
An ultra low-noise receiving system for deep space telemetry reception.
Ultralow-noise planetary radar receiving system with high-performance feed and maser preamplifiers, noting aperture utilization
FEED SYSTEM↗
Phase I report on development of a low-noise 8 mm receiver front end
Amplifier design evaluations in study to provide wideband receiver front end for radio astronomy purposes
RADIO RECEIVER↗
Low-noise amplifier design with field-effect transistors, volume I Final report
Low noise amplifier design with field effect transistors, random noise characteristics, and noise measurements on commercial devices
NOISE MEASUREMENT↗
A positive resistance up-converter for ultra- low-noise amplification.
Ultralow-noise two-channel tunable cascade amplifier system using upconverter and traveling wave maser
TRAVELING WAVE MASER↗
Design of low-noise transistor switch capable of meeting military EMI specifications.
Low noise transistor switch design capable of switching 1A and meeting military current probe EMI specifications
SWITCHING CIRCUIT↗
A Simple Beamshaping Device for Cassegrainian Antennas
A simple beamshaping modification for Cassegrainian systems is described. A qualitative analysis is used to describe this device as well as to explain the poor performance observed with an unmodified Cassegrainian system. Experimental data are presented on both the modified and unmodified systems. The modification reduces spillover by a factor of 2 to a value of only 1. 3%. Simultaneously, the aperture efficiency is increased from 50% for the unmodified system to 60% for the modified system. Field measurements on an 85- ft modified Cassegrainian system are described which experimentally verify the applicability of the modified subreflector to low-noise antenna design. The measured zenith antenna temperature for this system is 9. 5° K; measured aperture efficiency is 50%.
ANTENNA↗
The electrical characteristics of the conical horn-reflector antenna
The conical horn-reflector antenna was selected for the satellite communication ground station because of its broadband and low-noise properties. Prior to the construction of the full-size antenna, theoretical and model studies of its electrical characteristics were undertaken. These studies consisted of computing gain and radiation patterns for two modes of excitation, constructing of model antennas and measuring them. Results of these studies are presented in this paper together with results of the measurements of the full size antenna at Andover, Maine.
GROUND STATION↗
Synthesis of improved feeds for large circular paraboloids
Synthesis of low-noise feeds for large circular paraboloids using hybrid modes propagated in cylindrical waveguides - antenna field patterns
ANTENNA FIELD↗
Project Echo: Receiving System
A tracking horn-reflector antenna, a maser preamplifier (and standby parametric preamplifier), and a special FM demodulator were combined to form a low-noise receiving system which made possible the establishment of a high-quality voice circuit via the Echo I passive satellite. This paper describes the 2390-Mc receiving system located at the Bell Telephone Laboratories facility in Holmdel, New Jersey.
Ohm, E. A.↗
Project Echo: 961-Mc Lower - Sideband Up - Converter for Satellite-Tracking Radar
A 961-Mc lower-sideband up-converter was specially designed to serve as preamplifier for the satellite-tracking radar used in Project Echo. The amplifier and its power supply are separately boxed and are installed directly behind the tracking antenna. The amplifier has been functioning most satisfactorily and has been used in routine manner to track the Echo satellite from horizon to horizon. This paper describes the design considerations, and details the special steps taken to ensure that the amplifier met the particular system needs of low noise, absolute stability, insensitivity to temperature fluctuations, and high input-power level before the onset of gain compression. The satisfactory operation of this amplifier confirms the great potentiality of parametric amplifiers as stable, low-noise, high-frequency receivers.
Uenohara, M.↗