Zhuhai Airshow 2022
- Thread starter Blitzo
- Start date
-1dB~-4dB… better (?) than nothingMore stealth coatings and materials.
What is the typical amount?
Considering its weight, I guess -10dB is necessary for any practical applications. Some reports mentioned F-35 has -30dB material but I wonder if it’s true.
That’s for a coat of 0.8 mm.
Look at the frequency range though, that is approaching long band radar. At higher frequencies it will have even more attenuation judging from the curve.
Pay high attention to what you are reading and speaking.
The -1dB to -4dB is for P L bands, meter wave radar from 0.4 to 2 GHz. These radars are specifically designed to defeat stealthy objects. They look like this
You would thank god if you can get -1dB
F-35's RAM is to defeat X band 8 to 12 GHz.
The basic of radio wave is that the higher frequency it goes the more severe of attenuation, in other words easier to absorb (lower dB).
I’m sure those reports about F35 were talking about UHF band (although I don’t fully believe them).
This band (400M-2G) is not necessarily such big antenna except in its low end, in fact cellphones also work here.