J36-like sixth-gen RCS preview(类J36六代机的散射截面积预览)

Because of my procrastination, Its project has been drastically delayed. So at this point, I think I should just release the simple stuff I have and then work on something more advanced.

There is no magic in this world and even military projects need to follow physics.

part 1 RCS in higher frequency

Its post is just for short. Here is the RCS of J36-like without RAM for comparison.

Compared to legacy fifth-gen design, its sixth-gen design didn’t show any meaningful improvement. THey both having RCS of -20dBsqm(0.01m^2) up to 10 dBsqm(10m^2) with around -10dBsqm(0.1m^2) at nose.

RCS with multi-layer RAM coating. Now you know how it can perform with good absorbing material.

Part2 VHF(meter wave)-band RCS

Here is the first thing I want to point out. Because now electromagnetic wavelength has been very close to aircraft size(AKA. low value of λ). It makes an SBR-based solver never get accurate results.

In this case, the most used solver is the MoM solver. It’s a surface method so performance is better than full wave solution. But here I am using a time domain solver, which is a variant of FDTD solver and better but requires more resources.

For me thanks to GPU acceleration now FDTD solver is more available.

Part 3 skywave Over-The-Horizon radar

J36-like has RCS at Skywave from 50-500m^2. Almost any OTH radar can easily detect it.