Electrical/Electronics

Compact, Two-Stage, 120-W GaN High-Power Amplifier for SweepSAR Radar Systems

This innovation can be used for geophysical remote sensing radar applications. NASA’s Jet Propulsion Laboratory, Pasadena, California Next-generation synthetic aperture radar (SAR) remote sensing platforms utilize new concepts such as the SweepSAR techniques that provide increased swath size, high resolution, rapid global coverage, and subcentimeter interferometry and polarimetry. An L-band SweepSAR mission would use multiple transmit/receive (T/R) channels and digital beamforming to achieve simultaneously high resolution and large swath. One of the key challenges in implementing the SweepSAR concept is the development of space-qualified efficient transmit/receive modules (TRMs) that provide the amplitude and phase stability necessary for repeat pass interferometry.

Posted in: Briefs, TSP, Electronics & Computers

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Eliminating Wires in Making Electrical Connections to a Stack of Electron and Ion Optical Components

This technology can be used in environmental monitoring applications that require miniature, robust mass spectrometers. NASA’s Jet Propulsion Laboratory, Pasadena, California Making electrical connections inside a vacuum chamber to a stack of electron and ion optical components using the conventional approach of discrete wires is not efficient because: (1) the separate wires must be insulated from each other and the interior structures; (2) the wires must be spot welded or mechanically secured at their end points to the electrical feedthroughs and optical components, both of which are typically bulky and prone to failure in vibration; and (3) the wires are a major source of failure in high-G applications.

Posted in: Briefs, Electronics & Computers

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Graphene Composite Materials for Supercapacitor Electrodes

Graphene is combined with a metal oxide nanocomposite. Ames Research Center, Moffett Field, California In recent years, electrochemical capacitors, or supercapacitors, have gained the most intense interest as an alternative to traditional energy storage devices such as batteries. The demands of the potential supercapacitor applications range from plug-in hybrid electric vehicles (PHEVs) to backup power sources. While the power density of supercapacitors surpasses that of most batteries, most commercially available batteries have a significantly higher specific energy density than supercapacitors. Electrode composite materials have been developed that combine graphene with a metal oxide nanocomposite of MnO2 and Co3O4.

Posted in: Briefs, Electronics & Computers

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Integrated, Radiation-Hardened Radio Frequency Digitizer and Signal Processing Electronics

Goddard Space Flight Center, Greenbelt, Maryland Imaging LiDAR systems such as Goddard’s Reconfigurable Solid-state LiDAR (GRSSLi) must collect and process reflected pulses of light in order to correctly assemble a three-dimensional image of the scene. These pulses of light generally range from 2-5 nanoseconds in duration. Consequently, to collect a large number of samples for this short pulse, a high-sample-rate analog to digital converter (ADC) must be used. Other methods such as threshold detection could be used, but generally these detection methods suffer degradation in overall range, measurement accuracy, and precision due to the random nature of return pulse intensity. In addition, scientifically valuable information can be gleaned from the shape of the returned waveform.

Posted in: Briefs, TSP, Electronics & Computers

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Delivering Roadworthy Designs: Automotive Electronics Circuit Protection Overview, Applications & Standards

Today’s automotive designs include nearly 100 microprocessors; that number is expected to double in five years. And from in-dash displays to connected technologies to safety systems, all on-board electronics require circuit protection designed-in.

Posted in: On-Demand Webinars, Electronics

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Finding the Right Manufacturer for Your Design

To receive a quality PCB, you need an efficient design and a manufacturer capable of producing it. This paper will examine the challenges and best practices associated with matching your design requirements to a manufacturer's capabilities.

Posted in: White Papers, Electronics & Computers

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Electronic Component Testing: A Non-contact Sport

As electronic circuit boards and components get smaller and more powerful, inherent heat can cause significant damage. Infrared thermography can identify hot spots, allowing for improved thermal management and greater advances in circuit board design.

Posted in: White Papers, Electronics, Electronics & Computers, Cameras, Imaging

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