High-precision broadband, so that stealthy weapons have nothing to hide.
As we all know, radar mainly relies on receiving the reflected signals from the target to discover the target. If the surface of the target can make the radar wave be absorbed or scattered, it can greatly reduce the probability of being found, so as to achieve the purpose of stealth. Therefore, what is usually called stealth technology is mainly rely on the shape, wave-absorbing coatings, the formation of plasma clouds to absorb or change the direction of propagation of radar waves to achieve stealth.
After the application of stealth technology, conventional narrow-band microwave radar in the detection of radar cross-section is very small stealthy weapons often appear to be "incompetent". Therefore, for a long time, people are talking about "hidden" color change. But the current stealth technology is not invulnerable, they can only play a very narrow a specific band, beyond this specific range will be unable to help.
And in the transition region of the electromagnetic spectrum, terahertz is a combination of the strengths of many. On the one hand, its wavelength is very short, about 30um-3mm range, much smaller than the wavelength of microwaves and millimeter waves, and thus can be used to detect smaller targets and more accurate positioning; on the other hand, it contains a wealth of frequencies, has a very wide bandwidth, and can be used to launch thousands of kinds of frequency nanoseconds to picoseconds level pulses, which is much more than the existing The range of stealth technology is much wider than that of the existing stealth technology. Therefore, regardless of the face of shape stealth, paint stealth, or plasma stealth targets, can make them "nowhere to hide"! The United States is the first to put forward the concept of terahertz radar countries, and has carried out 0.2 THz, 1.56 THz, 0.6 THz and other high-resolution radar experiments, to verify the feasibility of terahertz radar, laying the foundation for future development. Terahertz radar as a future high-precision, anti-stealth radar development direction, in the military will have a broad application prospects.