There are a lot of electromagnetics software modeling suites out there (HFSS, CST Microwave, Sonnet some I've heard of).
I want to terminate a coplanar GS or GSG waveguide with 50 ohm. I know that sizing a good conductor down to below 100 nm diameter can actually lead to resistance of this size. But as I'm no expert I still have trouble to find the right direction. Based on my question here, I'm unsure besides the 50 Ohm termination, how I have to bend the ground lines at the end. Do I have to use in any case one of above mentioned software to get here a reasonable waveguide without endless trial and error?
The upper left might have the right termination of 50 Ohm, but the reflection happens before short-circuiting signal and ground, the upper right and lower left would be my next guesses for correctly terminated cpw, the lower right GS waveguide, basically this is a mini coil, but would probably not behave like a 50 ohm load for a very broad frequency range. Can those software packages take into account things like skin effect to simulate impedance correctly? Which software should I choose, as far as I've heard Sonnet might be best for planar waveguides and antennas