Over the past few weeks, I've been diving into a fascinating series of articles focusing on UAV monitoring and positioning solutions. These pieces have really opened my eyes to how advanced technology is helping address some serious challenges faced by critical facilities like airports. In the third installment of this series, Keysight Technologies has come up with some innovative solutions that feel like they're straight out of a sci-fi movie.
Their approach seems almost magical—like having thousands of eyes and ears that can pick up even the faintest signals. They’ve managed to develop tools capable of detecting drones even when they’re hidden behind thick clouds or flying far away. It’s incredible to see how these technologies are being put to work.
The real-world test took place near the Guanting Reservoir just outside of Beijing back in May 2017. This trial involved setting up three small monitoring stations outdoors. Each station uses highly sensitive equipment to ensure accurate detection and positioning. For instance, one typical setup includes a broadband omnidirectional antenna paired with an RF sensor. The RF sensor itself operates within the 20 MHz to 6 GHz frequency range and comes equipped with GPS capabilities for precise location tracking.
One particular monitoring station was placed in the upper-left corner of the area under observation. Using simulation tools, it showed a coverage radius of approximately 680 meters. During实地testing, however, researchers found that this station could actually detect signals from over 700 meters away! They successfully pinpointed a drone controller located between 313 meters and 636 meters from the station. With the right antenna choices and reduced cable losses, users can expect coverage extending up to 1-2 kilometers.
During the experiment, the N6841A RF sensor was configured with a 7 MHz bandwidth and 6000 sampling points, resulting in position updates every two seconds. The accuracy of these positions remained impressive, with errors typically staying below 20 meters. When it came to live flights, the system proved equally reliable, achieving positioning accuracies within 50 meters. The N6820ES software handled signal identification and location outputs while the N6854A software focused on backhaul signals from the drone, using advanced techniques like LookBack GEO and time synchronization to track frequency-hopping controllers effectively.
Users also have access to additional tools such as the 89601B software, which allows for comprehensive demodulation and vector signal analysis. This helps gather and manage vast amounts of spectrum data in busy areas, contributing towards restoring clear, interference-free communication environments.
As part of the demonstration, we saw how the system tracked the entire flight path of a drone. On a map, this appeared as a series of red dots marking the detected positions, accompanied by purple arrows indicating movement directions. Even at the edges of the monitored zone, the system maintained precision and clarity.
Reflecting on all this, it’s clear that Keysight’s innovations hold immense potential for improving drone management in sectors like aviation and telecommunications. By offering robust solutions, they’re paving the way for safer skies and fostering sustainable growth within the drone industry. Overall, this series has been enlightening, providing fresh perspectives and practical insights into managing UAVs responsibly.
Semiconductor Chip Carrier
Semiconductor Chip Carrier can be divided into thermo-electric modules, and the power electronic substrates.
Thermo-electric modules are plate-like semiconductor cooling devices that work by using the movement of heat when a current flows through the junction of two different metals. Compact, lightweight, and Freon-free, they are used in climate control seats of automobiles, cooling chillers, optical communications, biotechnology, air conditionners, dryers and a variety of consumer electronic products.
Application of Thermo-electric module Manufacturing Technology for Heat Dissipation and Insulation Substrate
Generally, organic and metal substrates are used in the circuit boards of low-power home appliances and computers.
However, alumina, aluminum nitride and silicon nitride substrates are used in heat radiation insulated substrates of power modules that handle high power.
In particular, silicon nitride substrates are attracting attention for use in power modules of inverters and converters because of the increase in sales of HEVs and EVs.
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