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Three-Stage InP Submillimeter-Wave MMIC Amplifier
new!
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Date added: 05/01/2008 |
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This work is aimed at pushing the MMIC and transistor technologies toward higher frequencies and, at these higher frequencies (>300 GHz), a wealth of spectral lines of molecular species exist and could be studied with more sensitive receivers. |
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Fast Offset Laser Phase-Locking System
new!
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Date added: 05/01/2008 |
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An earlier phase-locking system was difficult to use. The system described here has higher performance and stability than previous systems. It is easier to use, programmable, and flexible. Because it is based on a field programmable gate array (FPGA), and operates almost entirely digitally, it is easily adaptable to many different systems. |
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Solid-State High-Temperature Power Cells
new!
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Date added: 05/01/2008 |
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All-solid-state electrochemical power cells have been fabricated and tested in a continuing effort to develop batteries for instruments for use in hot environments. Batteries of this type are needed for exploration of Venus, and could be used on Earth for such applications as measuring physical and chemical conditions in geothermal wells and oil wells, processing furnaces, and combustion engines. |
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24-Way Radial Power Combiner/Divider for 31 to 36 GHz
new!
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Date added: 05/01/2008 |
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A higher order (N=24) of power combining using a novel radial power combiner has been demonstrated that also exceeds a 15% bandwidth (31 to 36 GHz) due to the incorporation of a new implementation of a ‘Marie’ mode transducer. |
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Architecture for a High-to-Medium- Voltage Power Converter
new!
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Date added: 05/01/2008 |
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The novel idea in this technology is the approach used for
interconnecting and control of a large number of low-voltage, high-frequency, PWM, isolated dc-to-dc converters. |
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Coaxial Electric Heaters
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Date added: 04/01/2008 |
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We report a simple and cost-effective device designed for heating spectroscopical cells. The main features of our heater are its small size and coaxial configuration, as well as the mechanical flexibility. |
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High-Density, High-Bandwidth, Multilevel Holographic Memory
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Date added: 04/01/2008 |
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A new concept was developed of using multilevel holograms to replace the binary-valued holograms to increase the storage density and data transfer bandwidth without significantly increasing the HM system volume/mass/power consumption. |
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Tailored Asymmetry for Enhanced Coupling to WGM Resonators
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Date added: 03/01/2008 |
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We have built several working prototypes of dipolar (elliptical cross section) and monopolar (roughly speaking, an ‘egg-shaped’ cross section) resonators from lithium niobate. To our knowledge, these are the first demonstration of such resonators in optical crystals. |
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Phase Calibration of Antenna Arrays Aimed at Spacecraft
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Date added: 03/01/2008 |
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This technology pertains to calibration of uplink arrays using power measurements from a nearby spacecraft. |
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Breadboard Signal Processor for Arraying DSN Antennas
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Date added: 03/01/2008 |
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This work is a breadboard implementation of architecture for arraying a high number of antennas (greater than 100) that combines signal processing for a wideband FX correlator with a combiner for beamforming. |
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