Number of antennae needed for MAX HD4 IP67

Please advise what kind of antenna (Dual MIMO LTE Antenna, ANT-100-LTE4-G?) is used for MAX HD4 IP67 and how many number of such antenna is need. Thanks!

@mldowling has a nice review at an earlier hd4 antenna thread.

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It really depends on how many cellular modems you want to have functional. And the aux/diversity can only help download not upload speed. Personally, on my MK2 deployment, one antenna is fine and I put a terminator on the open aux/diversity port. I really wanted more upload speed but since a second antenna won’t help that I am going to skip.