The term ‘stealth’ has been applied to everything from ships to towed generators but the most widespread understanding of term is as applied to combat aircraft, the F117, F22 and of course, the F35. Low observability has a cost penalty but in the face of emerging air defence technologies such as multistatic radar it really isn’t an optional extra.
Electronic countermeasures also contribute to the aircraft survivability mix, arguably under reported in the sexy stealth world.
One of the newest technologies on the attacking side is intercept-resend, it is far more sophisticated than what we might understand as jamming.
Put simply, Intercept-Resend, absorbs the sending radars signal, manipulates it and resends it back to the receiver. The resent signal can give a false impression of location, speed and shape, or, it can even be manipulated in such a way that completely false targets are fed back.
These false signals are extremely difficult to counter.
Step forward Mehul Malik, Omar S. Magana-Loaiza, and Robert W. Boyd from the University of Rochester, New York.
We have built an imaging system that uses a photon’s position or time-of-ﬂight information to image an object, while using the photon’s polarization for security. This ability allows us to obtain an image which is secure against an attack in which the object being imaged intercepts and resends the imaging photons with modiﬁed information. Popularly known as “jamming,” this type of attack is commonly directed at active imaging systems such as radar. In order to jam our imaging system, the object must disturb the delicate quantum state of the imaging photons, thus introducing statistical errors that reveal its activity.
This exploits the simple fact that in order to measure a photon changes its quantum properties and it is these changes that can be detected, using quantum mechanics to provide what would appear to be a detection system that is immune to counter.
Their initial tests have been reported to be successful but no doubt there are a whole host of people lining up to devise a counter counter counter measure!
No, I don’t understand it either but it is interesting to see the source of primary science research and how it might evolve.
Read the paper here;