The best solution (KISS) is to make certain that the single transmitter is protected from damage. As described above, the old 75 gHz receivers could share transmitters, but with 2.4 gig that can’t be done in any practical manner. The usual instances of the use of radio redundancy is the use of dual receivers tied to the same transmitter.
Did the OP test the range of his hermaphrodite receiver over water? 2.4 gig signals behave differently over water versus over solid ground. I have trouble believing that an untuned antenna would double the range, but then I haven’t tried it so maybe....
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