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Briefs Electronics & Computers
Optical Microwave-Signal-Channelization Technique Analyzed
In a recent study, a proposed technique for optical frequency-band channelization of a microwave signal or other wide-band radio signal in a receiver was analyzed and compared with...
Briefs Electronics & Computers
Magnetic Memory Devices for Embedded Computing
A program of research has been dedicated to the development of magnetic memory devices than can be incorporated into complementary metal oxide/semiconductor (CMOS) integrated circuits, wherein...
Briefs Electronics & Computers
Effects of High-Power Microwave Pulses on Electronic Systems
A five-year program comprising several coordinated research efforts was devoted to increasing understanding and developing capabilities for computational modeling of the effects of...
Briefs Photonics/Optics
Laser-Based System for Measuring and Analyzing Vibrations
A system for noncontact measurement and analysis of vibrations of an electronic circuit board or a similar lightweight, nominally flat, rectangular object has been developed. This...
Briefs Electronics & Computers
Microscale Electrical Contacts for Self-Assembly
An experimental study of self-assembly processes in which small, heterogeneous components become spontaneously aligned with each other and bonded through soldering of mating electrical contacts...
Briefs Electronics & Computers
Use of a Heat Pipe to Cool Aircraft Electronics
The first steps have been taken in a continuing project to study the suitability of dissipating heat from electronic and electric-actuator equipment aboard an aircraft by using a loop heat pipe, containing water as the working fluid, that delivers the heat to the exterior aircraft skin. The first...
Articles Connectivity
Rugged Computing Power for Small Platforms
Sensor-based imaging systems generate invaluable information for modern warfare, but a serious challenge exists to the timely use of that information. Data links that provide the transmission backbone...
Articles Electronics & Computers
Considerations for Thermal Management of Printed Wiring Boards
Remaining at the forefront of technological advancements in the printed wiring industry requires a proven combination of process methodology, state-of-the-art processing equipment,...
Briefs Electronics & Computers
Design Study of a C-Band Crestatron
A design study of a crestatron that would operate in the frequency range from 3 to 6 GHz (which overlaps with the C band) has been performed. The basic crestatron concept was developed during the 1950s....
Briefs Electronics & Computers
Conjugated Polymers Having High Charge-Carrier Mobilities
A three-year research project encompassed multiple studies of (1) polymer semiconductors that exhibit relatively high electric-charge- carrier mobilities and (2) applications of these...
Briefs Electronics & Computers
Software-Defined Radios for Urban and Indoor Navigation
Software-defined radios (SDRs) are being developed to provide positioning and communication (POSCOMM) services inside buildings and tunnels, under tree canopies, and in other environments...
Briefs Electronics & Computers
Network-Enabled Resource Devices
Network Enabled Resource Devices (NERDs) combine the most common electronic components used in robotic applications into a standard electronics box with "plug-n-play" capabilities. Risk reduction efforts, systems testing and integration, and modifying the functionality of evolving systems becomes greatly simplified...
Briefs Test & Measurement
Delta-Sigma UHF Digital Waveform Generator
A prototype Digital Waveform Generator (DWG) in the ultra-high-frequency (UHF) range uses Delta-Sigma (Δ−Σ) modulation techniques, which permit arbitrary and accurate waveform...
Briefs Sensors/Data Acquisition
Applying Reconfigurable Computing to Acoustic Sensors Using FPGAs
A novel microsensor processing architecture allows a field-programmable gate array (FPGA) to act as a reprogrammable preprocessor or coprocessor to a general-purpose processor...
Briefs Electronics & Computers
FPGA-Based Communication Channel for Digital Signal Processor Chips
A method for networking, and a network of, digital signal processors (DSP) via at least one field-programmable gate array (FPGA) enables the simultaneous broadcast of data from a DSP to a number of DSPs. The apparatus comprises a host DSP, at least one FPGA in communication with...
Articles Imaging
Data-Based Paradigm for Rapid Development of Advanced Avionics Displays
The database concepts, tools, and runtime software described in this article provide a methodology for creating advanced avionics human-machine interfaces (HMIs), such as...
Briefs Electronics & Computers
AlxInyGa1-x-yN Ultraviolet Light-Emitting Triodes
Light-emitting triodes (LETs) have been the focus of a program of research with a goal of increasing the quantum efficiencies of ultraviolet-lightemitting devices implemented in the...
Briefs Electronics & Computers
Advances in Organic-Based Electronic Devices
A program of research has addressed multiple topics in the field of electronic and optoelectronic devices based on polymers and other organic substances, with special attention to memory devices and...
Briefs Electronics & Computers
A Comparison of SiC-Based Devices for Use as Power Switches
A report details a survey of the state of technological development and commercial availability of SiC-based electronic devices that has been performed to evaluate the suitability of such devices as power switches in present and future applications in which high reliability and/or...
Briefs Electronics & Computers
DC Power Converter for 200°C Containing SiC Transistors
A DC-to-DC power converter, nominally rated for a power of 180 W, an input potential of 28 V, an output potential of 270 V, and a maximum operating temperature of 200°C has been...
Briefs Electronics & Computers
Protection Schemes for Advanced Shipboard Electrical Systems
A research program has made progress toward the development of schemes for protection against faults in next-generation DC zonal shipboard electrical systems (DC SESs) and for...
Articles Communications
Network Keeps Line of Communication Open to Convoys
An airman riding as part of a convoy escort team in Iraq keys his radio microphone to check in with his base, and hears nothing but dead air. The U.S. Air Force is leading a joint...
Briefs Electronics & Computers
Monitoring and Charging System for a High-Power Battery
Figure 1 is a simplified block diagram showing (1) a high-power rechargeable battery comprising multiple series-connected modules, each module containing multiple series-connected...
Briefs Electronics & Computers
Quantum Network Testbed
A document describes the world’s first quantum network testbed — an Internet-compatible fiber-optic data-communication network that is kept extremely secure by use of encryption with quantum key distribution (QKD). The testbed, located in the Boston metropolitan area, includes ten nodes, of which four run continuously...
Briefs Electronics & Computers
Time Coding of Asynchronously Transmitted Multi-Source Data
A method of time coding of asynchronously transmitted data from multiple sources has been invented. The method is especially applicable to a data-acquisition and transfer system that...
Articles Defense
The Ballistic Missile Defense System: An Integrated Approach to Global Defense
Although the end of the Cold War signaled a reduction in the likelihood of global nuclear conflict, the threat from ballistic missiles has grown steadily as...
Briefs Electronics & Computers
Variable-Data-Rate Speech Encoder
Avariable-data-rate (VDR) speech encoder has been designed to be interoperable with, and eventually to supplant, the many different voice encoders now used in military communication systems. Because these older...
Briefs Electronics & Computers
Miniature Semiconductor Diodes as Pumps and Motors
Experiments have shown that when a miniature semiconductor diode floats in an aqueous solution and an alternating electric field is applied, (1) the diode rectifies the alternating potential...
Briefs Electronics & Computers
Interactive DataWall
The Interactive DataWall (IDW) is a computer-driven, high-definition display, large enough to be visible simultaneously to multiple observers, that presents information from multiple sources and exploits advanced techniques...
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