As we all know, radar mainly detects the target by receiving the reflected signal of the target. The so-called stealth technology mainly depends on shape, absorbing coating and other ways to absorb radar waves or change the propagation mode of radar waves
as to achieve the purpose of stealth. Coincidentally, terahertz radar is almost immune to these stealth tricks. Terahertz, which is better than others, is much smaller than the wavelengths of microwave and millimeter wave, and can be used to detect smaller targets and achieve more accurate positioning. At the same time, terahertz wave contains rich frequencies and wide bandwidth, which can emit nanosecond or even picosecond pulses at thousands of frequencies, which is much beyond the shielding range of the existing stealth technology.
Terahertz radar can decipher general reflected signals