I’m using 4x A6000 Ada cards for EM simulation. They have 48 GB ECC and 2-slot width so can be accommodated in a server case, versus 24 GB non ECC and 3-slot width for the 4090. They are actually faster for FP32 than the A100, but really poor for FP64.
Most antennas actually have a large radar cross section (RCS), with simple dipoles being some of the worst. An infinitely thin dipole (a current filament) has a non zero RCS even though it has no physical cross section.
In theory, a reflector antenna can have a zero RCS, so putting a reflector behind a dipole will reduce the RCS. It’s totally non-intuitive.
Don’t buy the damned things. I just bought a 1989 Toyota pickup. Manual transmission, locks, windows, etc. Super reliable and easy to work on. It’s got a standard double-DIN stereo opening, so you could install the latest touch-screen gizmo if desired.
Expanded polystyrene has an extremely low loss tangent and dielectric constant, so I fail to see how microwave heating causes more chemical leaching than hot water.