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What is Pulse Shaping?
Pulse shaping, as it is done today, is an effort to fix fidelity issues caused by the transmitting amplifier and is accomplished by a combination of imperfect methods, most external to the amplifier. This article...
Briefs Photonics/Optics
New Family of Glass for Lens Applications
A new composition of germanosili-cate glass created by adding zinc oxide has properties good for lens applications. The new family of zinc germanosilicate glass has a high refractive index comparable...
Briefs Data Acquisition
Optical Signal Amplifying Technique
Optical Signals can be retrieved from inherent background noise using Talbot effect to amplify them.
Briefs Communications
Method Recharges an Electric Car as it Drives
This practical technique uses magnetism to transmit electricity wirelessly to recharge electric cars, robots, or drones.
Briefs Photonics/Optics
Unique Amplifier Could Change Optical Communication
Researchers at Chalmers University of Technology have developed an optical amplifier that they expect will revolutionize both space and fiber communication.
Briefs Aerospace
Ka-Band Front-End Monolithic Microwave Integrated Circuits (MMICs) and Transmit/Receive (T/R) Modules Testing
Gallium nitride monolithic microwave integrated circuit (MMIC) technology has superior performance in power amplifier applications.
Briefs RF & Microwave Electronics
Sensitive Optical Receivers for Space
This concept could help break through the present-day data-return bottleneck in deep space missions.
Briefs Photonics/Optics
Cascaded Offset Optical Modulator
This subsystem is used in free-space optical communications and fiber-optic communications.
Briefs RF & Microwave Electronics
Quantum Sensor Enables Wide Spectral Coverage
The sensor could provide a way to detect communication signals over the entire radio frequency from 1 to 100 GHz.
Briefs Test & Measurement
Radiation-Hardened Gain Digitizer
This instrument has applications in medical equipment, robotics, and satellites.
Articles RF & Microwave Electronics
90° Hybrid Coupled Power Amplifier – Pros and Cons
Wireless communications is a broad market and PAs fill a wide array of those applications.
Briefs Photonics/Optics
Free-Space Fiber Optic Laser Rod
This approach removes the limitation on peak power densities that exists for fiber lasers.
Articles Electronics & Computers
Solid-State Microwave Power Module
The MPM has uses in military aerospace applications.
Articles Electronics & Computers
Broadband 1.2- and 2.4-mm Gallium Nitride (GaN) Power Amplifier Designs
The US Army Research Laboratory (ARL) has been working with Raytheon to design efficient, broadband, linear, high-power amplifiers and robust, broadband, low-noise...
News Manned Systems
Nano Dimension Creates the First Printed Circuit Boards with Side-Mounted Features
Nano Dimension Ltd., an additive electronics provider based in Ness Ziona, Israel, has developed the world’s first side-mounting technology for printed...
Briefs Electronics & Computers
Hybrid, Wide-Range Detector Amplifier
Many applications require detection of both very small and very large signals. High-gain detector amplifiers provide low noise, but are easily swamped by large signals. Logarithmic amplifiers provide a...
Briefs Electronics & Computers
Gated Chopper Integrator (GCI)
Microvolt-level signals require gains of at least a thousand. Offsets and noise in the amplifier chain will be amplified by the same amount, which can saturate the amplifier or swamp the signal so it is not resolvable. Other methods use chopping and/or autozero techniques to lower the offset and noise. The key...
Articles RF & Microwave Electronics
Simplifying Access to High Energy Sub-5-fs Pulses
In order to make ultrafast pulses accessible to the broadest possible field of applications, Coherent has been implementing a comprehensive program of design methodologies, materials...
Articles Defense
Compact Power Amplifier Solution for Electronic Warfare
Wolfspeed, a Cree company, provides field-tested silicon carbide (SiC) and gallium nitride (GaN) power and RF solutions. As a leader in wide-bandgap semiconductor technology, Wolfspeed...
Briefs Sensors/Data Acquisition
Auto-Zero Differential Amplifier
Engineers in the NASA Goddard Space Flight Center Instrument Electronics Development Branch have developed a chopper-stabilized auto-zero amplifier capable of amplifying signals with extremely small amplitude originating from a thermopile-based infrared (IR) sensor. The instrument is self-adjusting in that it...
Features Test & Measurement
Using Air Gaging for Measurement of Orthopedic Devices
For patients, high-quality orthopedic components mean that implants can be kept for as long as possible, reducing or even eliminating the need for further procedures down the road. In...
Briefs Energy
High-Power Solid-State Power Amplifier System
NASA Marshall Space Flight Center (MSFC) has developed a High-Power Solid-State Power Amplifier System that combines 1-KW modules (16 amps total) to generate up to 16KW of radio frequency (RF) power from 230 MHz. The NASA device is a first step toward increasing the power of solid-state power amp...
Briefs Electronics & Computers
Remote Detection of Electronic Devices
Non-Linear Junction Detection is a well-known technique for detecting electronics that utilize semiconductor (solid-state) junctions. The current state of the art for finding hidden electronics — such as electronic eavesdropping devices — using this technology has a maximum range of about 2 m, and more...
Briefs Lighting
Wireless Charging of Moving Electric Vehicles
If electric cars could recharge while driving down a highway, it would virtually eliminate concerns about their range and lower their cost, perhaps making electricity the standard fuel for vehicles. Researchers have wirelessly transmitted electricity to a nearby moving object, which could advance...
Briefs Communications
Paper-Thin Device Acts as a Loudspeaker and Microphone
A paper-thin, flexible device was created that can generate energy from human motion, and can act as a loudspeaker and microphone. The transducer is ultrathin, flexible, scalable, and...
Articles Aerospace
GaN Breaks Barriers
The increasing demand for higher data rates in telecommunications and higher resolution in industrial systems is pushing the frequency of operation higher for the electronics that support them. Many of these systems...
Briefs Photonics/Optics
High-Power Broadband Multispectral Source on a Hybrid Silicon Chip
For applications in manufacturing, remote sensing, medicine, military, and fundamental science, an ideal laser would have high output power and a diffraction-limited beam....
Briefs Photonics/Optics
Stimulated Brillouin Scattering (SBS) Suppression and Long Delivery Fibers at the Multikilowatt Level with Chirped Seed Lasers
One obstacle in the scaling of high-power fiber lasers arises because of nonlinear effects (e.g., stimulated...
Briefs Electronics & Computers
Shaper Design in CMOS for High Dynamic Range
Front-end electronics for capacitive sensors typically include a preamplifier followed by a filter. The preamplifier provides low-noise amplification of the signals induced in the sensor...
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