Originally Posted By: mlord

I've figured out how to change the microstrip spacings for 75ohm, but am unsure about the other components and about actually manufacturing such a PCB with two (or more) of these circuits.

Thanks

Calculating the microstrip is really only the hard part. The rest of the values don't change.

Let me look at making a schematic that has a SPDT on each port to increase the isolation to about 45dB. I believe Digikey has all the necessary parts (SP4T, SPDT, and right angle F connectors) to make a solid state switch. This will need 4 GPIO and 3.3V to work.