The furtive fighters and bombers They are airplanes designed to not be detected by the enemy, something they achieve through aerodynamics, the use of advanced materials in its construction and various technologies to minimize their signature before radars and thermal and acoustic sensors. Fighters like him F-35 Lightning II and bombers like the B-2 Spirit They are engineering milestones that, however, could be detected with a new tool that uses a commercially modified device already available. According to Chinese researchers who have published the investigation, this device can Identify and precisely locate the emissions of the US -low interception US radar (LPIR), reports South China Morning Post.
The Lpir is fundamental in American furtive aircraft such as the F-35 Lightning II, the F-22 Raptor and the B-2 Spirit bombers. It is also used in poachers, nuclear submarines and US antimisile defense systems. UU.
This type of radar is Designed to avoid being detected by other systemsso it emits very weak signals, it constantly changes frequencies, uses waveforms similar to noise, adaptive power control and advanced signal processing. Unlike traditional radars, which emit strong and concentrated signals easy to capture, LPIRs allow similar functions without betraying their presence or alerting the enemy.
Detect LPIR emissions is difficult, but possible with existing technologies As high -resolution and bandwidth receptors, advanced signal analysis algorithms, prolonged observation times for correlation and triangulation and artificial intelligence tools, but not with relatively economic commercial devices.
Researchers from the 38th Research Institute of the Electronic Technology Group of China, an advanced radar systems developer for the Chinese army, used various Spectrum analyzers commercially available and have a cost around 500,000 yuan (some 60,000 euros). These are usually used in telecommunications and electronics to visualize and analyze the spectral content of radiofrequency signals.
The device is capable of Locate the emission source with a precision between 10 and 13.5 mmeven under active interference, according to the peer reviewed research that was published in the Computer Measurement & Control magazine last month. One of these devices, the TFN RMT744Ait is commercially classified as civil telecommunications team, but in field tests it pays as a military degree sensor.
Although no more technical details have been made public, SCMP states that the device could use Advanced signal processing and automatic learning. It would also benefit from accurate calibration, hardware adjustments and sophisticated techniques to counteract the tactics of the LPIR, such as constant frequency change.