Tech

April 18, 2014

Remote troops closer to having high-speed wireless networks mounted on UAVs

darpa-uav-network
Missions in remote, forward operating locations often suffer from a lack of connectivity to tactical operation centers and access to valuable intelligence, surveillance, and reconnaissance data.

The assets needed for long-range, high-bandwidth communications capabilities are often unavailable to lower echelons due to theater-wide mission priorities.

DARPA’s Mobile Hotspots program aims to help overcome this challenge by developing a reliable, on-demand capability for establishing long-range, high-capacity reachback that is organic to tactical units. The program is building and demonstrating a scalable, mobile millimeter-wave communications backhaul network mounted on small unmanned aerial vehicles and providing a 1 Gb/s capacity.

DARPA performers recently completed the first of three phases in which they developed and tested key technologies to be integrated into a complete system and flight tested in subsequent phases.

“We’re pleased with the technical achievements we’ve seen so far in steerable millimeter-wave antennas and millimeter-wave amplifier technology,” said Dick Ridgway, DARPA program manager. “These successes—and the novel networking approaches needed to maintain these high-capacity links—are key to providing forward deployed units with the same high-capacity connectivity we all enjoy over our 4G cell-phone networks.”

Phase 1 accomplishments include:

 

* Smaller, steerable millimeter-wave antennas: During field testing, the program successfully demonstrated steerable, compact millimeter-wave antennas that rapidly acquire, track, and establish a communications link between moving platforms. Steerable millimeter-wave antennas will enable the formation of a high-capacity backhaul network between aerial and ground platforms.

* Low-noise amplifiers: Performers also demonstrated an advanced low-noise amplifier, which boosts the desired communications signal while minimizing unwanted noise. The prototype achieved the record for the world’s lowest noise millimeter-wave LNA at about half the noise figure of a typical LNA.

* More efficient and capable power amplifiers: Efficient millimeter-wave amplification is required to achieve the long ranges (> 50 km) desired in the Mobile Hotspots program. During Phase 1, performers demonstrated output power exceeding 1 watt and 20 percent power added efficiency from a single gallium nitride chip operating at E-Band frequencies (71 GHz to 86 GHz). Output powers exceeding 20 watts and approaching 20 percent PAE were also achieved using power-combining techniques.

* New approaches for robust airborne networking: Mobile ad-hoc networking approaches were developed to maintain the high-capacity backhaul network among mobile air and ground platforms. Phase 1 performers developed unique solutions to overcome connectivity and network topology challenges associated with mobility and signal blockages due to terrain and platform shadowing.

* Low-Size, Weight, and Power pod design to carry it all: Performers created engineering designs for small, lightweight pods to be mounted on an RQ-7 Shadow UAV. The pods, with all of the Mobile Hotspots components inside, are designed to meet the challenging program goals of widths no more than 8 inches, weight less than 20 pounds, and power consumption less than 150 watts.

Phase 2 of the program began March 2014. Two performers, L-3 Communications and FIRST RF, were chosen to lead teams comprising several Phase 1 performers. Phase 2 goals include the integration of the selected Phase 1 technologies into Shadow-compatible aerial pods and ground vehicles.  Phase 2 will conclude with a ground demonstration of at least four Shadow-compatible pods, two ground vehicles and a fixed ground node. A planned third phase will encompass field testing of the Mobile Hotspot systems on networks of multiple SRQ-7 Shadow UAVs and mobile ground vehicles.




All of this week's top headlines to your email every Friday.


 
 

 

Headlines April 17, 2015

News: Army extends benefits to Hood shooting victims - The Army will provide “all possible benefits” to victims of the 2009 Fort Hood shooting who recently were awarded the Purple Heart, the service announced April 16.   Business: Rolls-Royce lands biggest deal in its 109-year history - U.K. engineering company Rolls-Royce has won the largest order in...
 
 

News Briefs April 17, 2015

Army orders financial benefits for 2009 Fort Hood victims Dozens of soldiers and surviving family members of the 2009 Fort Hood, Texas, shooting are receiving additional Army pay that they felt was long overdue. The announcement from Army Sec. John McHugh April 16 comes a week after 36 Purple Hearts were awarded to victims and...
 
 
NASA illustration

NASA awards radiation challenge winners, launches next round

NASA illustration This illustration depicts our heliosphere, showing the approximate locations of Voyager 1 and Voyager 2 spacecraft. Galactic cosmic rays originate outside the heliosphere and stream in uniformly from all direc...
 

 

U.S. Air Force completes operational testing on Raytheon’s MALD-J

Raytheon and the U.S. Air Force successfully completed operational tests of Miniature Air Launched Decoy-Jammer, satisfying all requirements to attain Initial Operational Capability. “MALD-J’s unique capabilities have been proven in 42 successful flight tests during the last two years and brought us closer to full rate production,” said Mike Jarrett, vice president of Raytheon...
 
 

Northrop Grumman to expand North Dakota presence

In partnership with local leadership, Northrop Grumman confirmed its dedication to the future of unmanned systems development in the Red River Valley region by signing a lease agreement to anchor the new Grand Sky Technology Park in Grand Forks County. Northrop Grumman is working to identify specialized opportunities for the Grand Sky facility. The opportunities,...
 
 

Raytheon awarded more than $2 billion for an International Patriot system

Raytheon announced April 17 it has been awarded a contract worth over $2.0 billion to deliver the combat-proven Patriot Air and Missile Defense System to an undisclosed international customer. The contract, awarded April 2, 2015, and booked in the second quarter as a direct commercial sale, includes fully digitized new-production Patriot fire units with the...
 




0 Comments


Be the first to comment!


Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>