Quoted By:
Once an F-35 is airborne, an adversary may use a combination of multiple radar frequencies in order to try to identify the resonance frequency of two adjacent skin layers of an F-35 by experimenting with different frequency settings. If frequencies A and B happen to be set to the exact resonance frequency of any two adjacent layers and enough EM is pumped into the skin of the aircraft, the two layers will experience electrical arcing, which would give off a certain kind of EM signature, similar to a spark plug, detectable in the AM band. Due to the design of the S-400, two separate units are not required, and the two frequencies can be emitted from the same locale. The radar could sweep an area suspected of being home to an F-35 and vary its operating frequencies, trying all possible combinations, in increments of .0025MHz. Before long, an AM band emission consistent with arcing should be detected. Whatever the setting of the two emitters at the time arcing is achieved, those would then therefore correspond to the aperture size of the meshes.
Armed with this information, not only could an adversary’s radar unit focus on the middle point in between those two frequencies, but it could also bombard aircraft deliberately with the ideal resonance frequencies as well, in conjunction with the mid-frequency in order to diminish temporarily the resonant capacity of the mesh and generate a stronger signal return from the mid-frequency, the frequency tailored to bypass the absorptive capability of the skin.
