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Communications

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Briefs: Communications
Personal Annunciation Device (PAD)

Many industrial and commercial plants, government and private research facilities, and industrial facilities perform potentially dangerous processes. Automated warning and alarm systems alert personnel to...

Briefs: Communications
Mobile Underwater Acoustic Communications

Reliable, long-range acoustic communications (LRAC) is an enabling technology for numerous applications of manned and unmanned underwater systems. For example, with the capability of communicating at long...

Briefs: Communications
A Smooth-Walled Feedhorn with Sub-30-dB Cross-Polarization Over a 30-Percent Bandwidth

The focus of this research was the design, optimization, and measurement of a monotonically profiled, smooth-walled scalar feedhorn with a diffraction-limited...

Briefs: Communications
Wireless Virtual Reality Headset

One of the limits of today's virtual reality (VR) headsets is that they must be tethered to computers in order to process data well enough to deliver high-resolution visuals. Wearing an HDMI cable reduces mobility,...

Briefs: Communications
Wideband Retroreflector

There are many known methods of retransmitting radio wave signals intra-building and inter-building, as well as ground-to-aircraft or ground-to-satellite. Some techniques modulate the reflection coefficient of an antenna....

On-Demand Webinars: Communications
Technical Webinar Series from the Editors of SAE: Connected Vehicles & Jobsites

Fleet owners have been deploying telematic solutions for some time, but connectivity is still just beginning to move from early adopters to mass market. Connectivity...

Briefs: Communications
Polarization-Dependent Whispering Gallery Modes (WGMs) in Microspheres

Dielectric microspheres are optical structures that exhibit resonant properties, meaning they can be used to select very narrow wavelengths of an incoming light beam's spectrum...

Briefs: Communications
Cellular Reflectarray Antenna and Method of Making Same

NASA's Glenn Research Center invites companies to license a new concept design for terrestrial satellite dishes and communications systems. The Cellular Reflectarray Antenna (CRA) has been...

Briefs: Communications
9-Meter Slaving System

The objective of the 9-Meter Slaving System is to transmit Launch Trajectory Acquisition System (LTAS) data from one of multiple incoming data streams to the 9-Meter antenna control unit using a synchronous serial modem. The...

Briefs: Communications
Ad Hoc Selection of Voice Over Internet Streams

NASA seeks interested parties to license the Ad Hoc Selection for Voice Over Internet (VoIP) Streams technology developed by engineers at Johnson Space Center. This technology features the ability to...

Question of the Week
Would you use "Printed Wi-Fi?"

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