Pro's usually suggest 90 degree bends is not good.
very old farts maybe
so this is the famous project i see mentioning over the microchip forums ?
Nope, even a relic, still a 90 degree bend is a hype.
Look how this high power TV RF transmission line used it too, in Dave's tour at EEVBLog Video #569, see that multiple 90 degree bends ?
Please don't tell us those RF engineers knew nothing about doing the right thing.