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Laser Polarimeter Classifies Remote Material

Advanced Optical Technologies, Inc. (AOT) has been awarded a Phase 2 SBIR contract to develop a next-generation laser polarimeter for the US Army RDECOM CERDEC Night Vision and Electronic Sensors Directorate (NVESD), traditionally known as the US Army Night-Vision Labs. The polarimeter will implement AOT’s polarization-components techniques (PCT), which apply machine-learning algorithms to polarimeter data for remote material classification.

Posted in: Application Briefs, Artificial intelligence, Lasers, Optics, Suppliers, Visibility, Military vehicles and equipment
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Bi-Axial Vibration Energy Harvesting

For air platforms, the installation of Structural Health Monitoring (SHM) systems is complicated by the fact that the majority of SHM devices need to be fitted on internal aircraft structure, underneath the aircraft’s skin. If the SHM device is in a location that is difficult to access, then powering the device may be problematic because traditional powering methods are generally not feasible. For example, replacing batteries on many SHM devices deployed across a fleet would be impractical, and accessing an onboard power system to supply SHM devices may lead to flight worthiness and certification issues.

Posted in: Briefs, Physical Sciences, Aircraft structures, On-board energy sources, Vehicle health management, Vibration
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Quantitative Analysis of a Hybrid Electric Humvee for Fuel Economy Improvement

The Army has acquired several hybrid platforms to assess the applicability of hybrid technology for military missions. These hybrid platforms include both series and parallel hybrid topologies. This work compares a conventional HMMWV (High Mobility Multi-purpose Wheeled Vehicle) M1113 with a series hybrid HMMWV XM1124 in terms of fuel economy improvements over three military drive cycles.

Posted in: Briefs, Physical Sciences, Architecture, Fuel economy, Hybrid electric vehicles, Military vehicles and equipment
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Electrochemical Energy Storage Materials

One of the most important requirements in next-generation batteries is to concurrently deliver high energy density and high power density (fast charge-discharge rates). The high power density requirement can be met with enhanced ion and electron transport kinetics in batteries, which in turn requires active materials with high ion diffusion constants and conductive additives or architectures for faster electron transport to respective current collectors. It is well known that nanostructuring the electrode materials would significantly enhance the characteristic time constant for ion diffusion, thereby reducing the intercalation/deintercalation time.

Posted in: Briefs, Materials, Battery cell chemistry, Energy storage systems, Nanotechnology
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Rotating Detonation-Wave Engines

All Navy aircraft and missiles use gasturbine engines for propulsion. Many ships are also dependent on gasturbine engines to generate both propulsive power and electricity. These engines are fundamentally similar to engines used to power commercial airplanes. Future ships moving to an “all electric” paradigm for the propulsion system will still require these gas-turbine engines to generate electricity for the propulsion system and also for other critical onboard systems. Because of the amount of power required by modern warfighting ships, and the prospect that this power requirement will only increase, there is a strong interest in improving the specific fuel consumption of these engines.

Posted in: Briefs, Mechanical Components, Electric power, Fuel economy, Gas turbines, Marine vehicles and equipment, Military aircraft, Missiles
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TVS Diode Arrays

Littelfuse, Inc. (Chicago, IL) has expanded its SP1005 and SP1007 Series General Purpose TVS Diode Arrays (SPA® Devices) with two new 0402 size devices designed to offer modern integrated circuits (ICs) better protection from electrostatic discharge (ESD). The low dynamic resistances of the SP1005-01ETG and SP1007-01ETG allow them to provide a clamping voltage up to 80 percent lower than competing technologies, such as Multi-Layer Varistors (MLVs). Typical applications include protection of keypads, buttons, switches, and low-speed I/Os on consumer electronics such as smartphones, tablet computers, e-readers, portable navigation devices, digital cameras, portable medical devices, etc.

Posted in: Products, Products, Electronics & Computers
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Signal Generator

Anritsu Company (Richardson, TX) introduces the MG3740A analog signal generator that outputs AM/FM/ΦM test signals for evaluation of narrowband analog radio equipment used in public safety networks and private commercial networks. Excellent -140 dBc/Hz SSB phase noise optimizes the test signals outputted from the MG3740A, allowing engineers to conduct highly accurate evaluations of narrowband analog radio equipment and components. Featuring level accuracy of ±0.5 dB over a wide level range of -110 to +17 dBm, the MG3740A allows for accurate tests of radio Rx sensitivity and amplifier distortion characteristics. The MG3740A can be configured with an option that outputs digital modulations. With the option, the MG3740A can be used as a test signal source for dual-mode radio equipment supporting both analog and digital communications.

Posted in: Products, Products, Electronics & Computers
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AC-DC Power Supplies

CUI Inc (Tualatin, OR) has announced the release of five new series of encapsulated AC-DC power supplies ranging from 5 W to 25 W. The VSK-T family is housed in a potted and encapsulated chassis mount package. The units are compact, measuring as small as 76mm x 31.5mm x 24mm (2.99 x 1.24 x 0.94 in) in the 5 W series. The VSK-T family provides a universal input of 85 to 264 VAC and fully regulated DC outputs of 3.3, 5, 9, 12, 15, 24, and 48 VDC depending on the series. The modules reach efficiencies of up to 87% and carry UL/cUL and CE 60950-1 certifications. Protections for over voltage, over current, over temperature and short circuit are included as well as isolation voltages of 4K VAC in the 5 and 10W versions and 3K VAC in the 15, 20, and 25W versions.

Posted in: Products, Products, Electronics & Computers
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Ultra-Low Power Converter

Texas Instruments Incorporated (TI) (Dallas, TX) has introduced the industry’s lowest power DC/DC step-down converter, which increases the amount of harvested energy an end application can use by as much as 70 percent over alternative devices. TI’s TPS62736 DC/DC converter delivers high power conversion efficiency from 10 uA to 50 mA output currents, and consumes only 350 nA of active current and 20 nA during standby. The converter achieves greater than 90-percent efficiency across output currents higher than 15 uA. The TPS62736 regulator steps down the voltage from a power source, such as a thin-film or regular battery or a super capacitor and features a programmable output voltage. The ultra-low power circuit enables battery-free power to applications, such as wireless sensor networks, monitoring systems, smoke detectors, wearable medical devices and mobile accessories.

Posted in: Products, Products, Electronics & Computers
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Mixed-Signal Cards

BEEcube (Fremont, CA) offers six ADC and DAC cards for wireless applications. The cards have VITA-57 FMC-HPC form factor and are pluggable in any of BEEcube’s products. The FMC104 ADC and FMC105 DAC are singlechannel, ultra-wideband (0.1 to 2.5 GHz) FMC cards with up to 5 GSPS sampling rate, and 10- and 12-bit resolution, respectively, for applications wireless microwave backhaul links working on the E-band radio frequencies. The FMC106 ADC and FMC107 RF-DAC are quadchannel, wideband FMC cards with up to 500 and 1500 MSPS sampling rate, and 14- and 16-bit resolution, respectively, for Wi-Fi MIMO systems working on the 2.4 or 5 GHz bands with 4 to 16 antennas. The FMC108 ADC and FMC109 RF-DAC are dual-channel, ultra-wideband (0.1 to 2 GHz) FMC cards with high resolution (12- and 14-bit, respectively) and up to 4 and 5.6 GSPS sampling rates in interleave and I/Q mode, for LTE-Advanced next-generation radio units.

Posted in: Products
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