Reid brought up the great point of why are we using a splitter when that would reduce the overall performance and the EIRP
we can use a switch, polling by switching between the two antennas every [insert amount of time (probably in the 0.5s range)]. Once we receive a signal in one of the paths we swap to that path.
Choosing a switch:
https://www.analog.com/media/en/technical-documentation/data-sheets/hmc849a.pdf