Diplexer for the Ground Station: https://www.everythingrf.com/products/microwave-rf-diplexers/networks-international-corporation/69-334-s-band-cavity-diplexer
Explanation of Diplexers vs Duplexers
https://resources.pcb.cadence.com/blog/2023-diplexers-vs-duplexers
Notes on Diplexing vs Duplexing:
Diplexing is when you separate signals based on frequency
Duplexing is when you separate signals based on direction
Hence T/R and T/R that goes into Splitter/Coupler into Diplexer into TX and RX of the COTS Transmitter for no dual patch
the other option is the two patches which would be too directional (put some numbers behind this) what % of orientations maybe a Coby thing.