Keyword: Antennas

Articles: Semiconductors & ICs
FUTURE ANTENNA MINIATURIZATION MECHANISM: MAGNETOELECTRIC ANTENNAS Hwaider Lin and Nian-Xiang Sun, Northeastern University, Boston, MA USA

Antenna...

Briefs: RF & Microwave Electronics
Correcting the Antenna Temperature of an Earth-Observing Microwave Instrument for Extraterrestrial Contamination

Microwave antennas deployed for spaceborne radiometers are diffraction-limited, with typical beam efficiency of about 90%, and provide relatively poor selectivity against radiation from celestial bodies (Moon, Sun, galaxy) when they...

Articles: Photonics/Optics

This column presents technologies that have applications in commercial areas, possibly creating the products of tomorrow. To learn more about each technology, see the contact information provided for that innovation.

Briefs: RF & Microwave Electronics

NASA Glenn’s cup cylindrical waveguide antenna (CCWA) is a short backfire microwave antenna capable of simultaneously supporting the transmission or reception of two distinct signals having opposite...

Briefs: Photonics/Optics

NASA’s Marshall Space Flight Center is building a small CubeSat that uses an 85-m2 solar sail deployed from a central location to capture the push of photons...

Briefs: Manufacturing & Prototyping

As 3D printing has become a mainstream technology, studies have investigated printable structures that will fold themselves into useful three-dimensional shapes when heated...

Briefs: Manufacturing & Prototyping

CAD models have been developed that enable objects to be 3D-printed out of commercially available plastics; these objects can wirelessly communicate with other smart devices, including a...

Briefs: Communications
System Integrates High-Speed Data and Wireless Power Transfer

Sources of wireless power — such as wireless cellphone charging pads — require near-physical contact with the pad, limiting the usefulness of a truly wireless power source. Recent work has extended wireless power to mid-range, which can supply power at inches to feet of...

Q&A: Photonics/Optics

Gravitational waves from colliding black holes were first observed by the Laser Interferometer Gravitational-Wave Observatory (LIGO)...

Briefs: Robotics, Automation & Control

A team of researchers from the Georgia Institute of Technology has developed a way to use 3D printers to create objects capable of dramatic expansion. The technology could someday be used in...

Briefs: Communications

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...

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. Prior art has used frequency multiplication or field effect transistor (FET) mixing to modulate the...

Articles: Imaging

Achip-scale optical device, developed by a team from the University of Sydney’s Australian Institute for Nanoscale Science and Technology (AINST), achieves radio frequency signal...

Briefs: Photonics/Optics

NASA Goddard Space Flight Center has developed a new radar approach that uses a single phased array antenna and a single-pass configuration to generate interferograms, known as Digital Beamforming...

Briefs: Robotics, Automation & Control

Multi-robot systems deployed in real-world applications are exposed to the same issues that computer systems face. A cybersecurity attack on a robot has the consequences of an attack on a...

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 data stream is determined by a 9-Meter telemetry operator's selection via a graphical user...

Briefs: Communications
Deep-Space Positioning System

NASA's Jet Propulsion Laboratory (JPL) has developed a compact, low-power, self-contained instrument that provides the equivalent of GPS throughout the solar system without the aid of an artificially provided infrastructure. The state-of-the-art X-ray navigation instrument is also able to determine the position of a...

Briefs: Communications

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...

Briefs: Materials
Negative Dielectric Constant Material Based on Ion Conducting Materials

NASA Langley Research Center has developed a novel negative dielectric constant material based on ion-conducting materials. A negative dielectric constant material is an essential key for creating metamaterials, or artificial negative index materials (NIMs). NIMs have...

Briefs: Materials

NASA's Langley Research Center has created a new class of materials based on depositing nanometer-sized metal particles onto carbon allotropes. The method is scalable and relatively...

Briefs: Green Design & Manufacturing
Three-Band Cloud and Precipitation Radar

After many years of use of Tropical Rainfall Measurement Mission (TRMM) and CloudSat data, focus groups within the cloud and precipitation science community produced requirements for the next generation of missions. The first draft of Aerosol-Cloud-Ecosystem mission requirements was formalized in 2009,...

Application Briefs: Software

Broadcasting employs the latest technology in many areas, but controlling the broadcast hardware connected to the antenna and the related transmission power, source, and facilities is usually still a...

Briefs: Mechanical & Fluid Systems
RFID Cavity

This technology provides a method for interrogating collections of items with radio-frequency identification (RFID) tags. It increases the read accuracy, meaning that more of the item tags will be successfully read. It also permits smaller tag antennas than would otherwise be necessary.

Briefs: Electronics & Computers
A High-Efficiency Power Module

Innovators at NASA’s Glenn Research Center have developed a microwave power module to power radar, communications, and/or navigation interchangeably. This high-efficiency, all-solid-state microwave power module (MPM) is based on a multi-stage distributed-amplifier design, which is capable of very wideband...

Briefs: Communications
Using a Power Grid as an Extremely Large Antenna for Geophysical Imaging

Geomagnetic storms drive geomagnetically induced currents (GICs) in high-voltage power transmission systems. GICs thus carry information about the near-space environment conditions. The U.S. high-voltage power transmission system was used as an extremely large antenna to...

Articles: Robotics, Automation & Control

Modern satellites use motors for many purposes — moving solar panels for optimum alignment to the Sun; moving reaction wheels to change the...

Briefs: Materials

NASA’s Langley Research Center has developed a technology that uses commercially available additive print manufacturing to add various levels of structural hierarchy to thin-film...

Briefs: Robotics, Automation & Control
Release of a Stuck Solar Array or Antenna

Satellite launches experience approximately one deployment failure every two years. These failures include a solar array or antenna that fails to deploy because it is stuck due to a mechanism failure, or is snagged by a cable or thermal blanket. Knowledge of the exact circumstances of the deployable...

Briefs: Software
Integrated Circuit for Radio Astronomy Correlators Supporting Large Arrays of Antennas

Radio telescopes that employ arrays of many antennas are in operation, and ever-larger ones are being designed and proposed. Signals from the antennas are combined by cross-correlation. While the cost of most components of the telescope is proportional to the...

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