CSD=CAD, Too much wine and not enough light..............
Glad you corrected that, you had me going for a minute... yeah, CAD and RF, good combination for having a good time.
Most of my design work was sub-gigahertz frequencies, always had a high respect for the guys who could work in the higher RF bands. Always wanted to learn enough about antenna design to do it, but never got around to it; too busy farting around with the stuff that's not supposed to radiate. And waveguide is one of those things I've only had dreams about.
Enjoy your evening, I'm signing off...