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Briefs Physical Sciences
Process for Testing Aeromedical Equipment
Medical devices are designed to function in environmentally controlled locations, such as stationary hospitals, and not within the harsh, dynamic aircraft environment. Yet, the same medical devices used...
Products Electronics & Computers
16-Bit Data Acquisition Board
Pentek, Inc. (Upper Saddle River, NJ) has added the Model 71662 four-channel, 200 MHz, 16-bit data acquisition board with built-in digital down converters (DDCs) to its popular Cobalt® family of Xilinx Virtex-6...
Application Briefs Test & Measurement
Measuring Radar Cross Section with Handheld VNAs
Radar cross section (RCS) is the measure of an object's ability to reflect radar signals in the direction of the radar receiver, i.e. it is the measure of the ratio of backscatter per steradian...
Application Briefs Test & Measurement
Handheld Scanner Keeps USAF Planes Combat-Ready
Engineers at several United States Air Force (USAF) bases now use NVision's HandHeld laser scanner to reverse-engineer complex aircraft parts, which are then accurately machined and installed....
Articles Aerospace
Fiber Optic Gyroscope Technology Improving Weapons Systems Performance
Autonomous vehicles require gyroscopes for navigation and stabilization of the platform in demanding battlefield, aerospace and undersea environments. Autonomous vehicles...
Application Briefs Test & Measurement
Low Noise Advances in RF & Microwave Signal Analysis Platforms
Spectrum measurements are essential to RF and microwave testing. The newer signal analyzers available today deliver performance far better than those of just a few years ago. The...
Products RF & Microwave Electronics
RF/IF Digitizer
ZTEC Instruments (Albuquerque, NM) and Astronics DME Corp. (East Aurora, NY) have developed the ZR8441 RF/IF digitizer. The digitizer comes standard with a full-featured, on-instrument spectrum analyzer. Technical specifications...
Articles RF & Microwave Electronics
Reliable EMI Shielding Materials and RF Cable Assemblies Ensure High Performance for Handheld Test Instruments
While high-performance test equipment has been used successfully in the laboratory for many years, the trend is moving toward remote...
Products Test & Measurement
Vector Signal Generators and Analyzers
National Instruments (Austin, TX) offers the NI PXIe-5663E 6.6-GHz, 2-, 3-, and 4-channel RF vector signal analyzers (VSA) and NI PXIe-5673E 6.6-GHz, 2-, 3-, and 4-channel RF vector signal generators (VSG)...
Briefs Sensors/Data Acquisition
Analysis of Clustering Tools for Moving Target Indication
Current and future forces operating in urban environments need the capability to detect slow-moving personnel inside buildings. To accomplish this, a time-domain approach was developed that uses a low-frequency, ultra-wideband (UWB) radar with a transmit pulse capable of penetrating through...
Products Test & Measurement
Microwave Signal Generators
The 2500B series of microwave signal generators from Giga-tronics (San Ramon, CA) covers 100 kHz to 50 GHz with low phase noise, high rejection of harmonics, sub-harmonics, and spurious, high output power level. Six...
Articles Aerospace
Fiber Interferometry for Testing Military Avionics
Fiber-optic networks have benefited from nearly 20 years of continuous expansion (notwithstanding the brief, yet surprisingly quiet period from 2002 to 2005). For terrestrial networking, this...
Briefs Physical Sciences
Improvements in Measurement of Permeability and Permittivity
The two-transmission method is an improved method of determining, from microwave measurements, the complex permeability and complex permittivity of a sample of a material typified by...
Briefs Test & Measurement
Effect of Laser Noise on an Analog RF/Photonic Link
Aset of equations has been formulated to enable quantification of several aspects of the performance of an analog photonic communication link as affected by laser noise. A procedure for...
Briefs Electronics & Computers
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 Test & Measurement
Small-Scale Combustion-Chamber Testing Facility
A small-scale combustion-chamber testing facility has been designed and partly built for use in evaluating advanced combustor designs for future gas turbine engines. The specific model combustor...
Briefs Physical Sciences
Scaling of Flight Tests of Unmanned Air Vehicles
A program of research has addressed a methodology of scaling of flight tests of unmanned air vehicles (UAVs) intended primarily for military use in observing and/or attacking targets on the...
Briefs Test & Measurement
Measuring Corrosion-Related Properties of Coupled Metals
Amethod and apparatus have been conceived for using electrochemical impedance spectroscopy (EIS) for determining rates of corrosion of coupled metals. EIS has been used heretofore for...
Briefs Test & Measurement
Life Tests of a Microwave MEMS Capacitive Switch
Life tests have demonstrated the longevity of an electrostatically actuated capacitive switch of a microelectromechanical systems (MEMS) type suitable for handling radio signals having...
Briefs Test & Measurement
Multiscale Virtual Design and Testing of Materials
Progress has been made in research on several fronts in an effort to develop computational simulation capabilities for use in virtual design and testing of advanced structural materials. It is...
Briefs Test & Measurement
Thermal Design and Analysis of a Rocket-Engine TAN Injector
A subscale thrust-augmented-nozzle (TAN) rocket engine was designed, built, and hot-fire tested to demonstrate the validity of the TAN concept. As described in more detail in the...
Briefs Test & Measurement
Composites Design and Structural Analysis Tool
AFRL researchers developed a unique design and structural analysis tool for composite materials, and they subsequently transitioned their product to manufacturers of helicopters and other...
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