Hello, I have a few questions related to antennas. Most are related to a setup for an HD4-MBX Cat 18 except for the first.
From (I think) roughly easiest to most difficult…
I’m looking at also purchasing a Transit Duo Cat 12, which has two modems and 4 cellular antenna ports. Occasionally I see references to using a single 4x4 MIMO dome antenna to serve two modems. Is that advisable? It’s certainly more convenient, but is performance lessened compared to two separate 2x2 MIMO antennas?
Can multiple antennas share the same ground plane, e.g. a single large sheet of metal?
According this this forum post (MBX CAT18 Antenns MAX-HD4-MBX-GLTE-G-T) the different antenna ports on the HD4-MBX Cat 18 are best tuned to different frequencies. Is that true? It doesn’t seem to be called out anywhere else.
The big one I’m struggling with, regarding spacing between separate MIMO antennas. I want to install the HD4-MBX into a portable Pelican-style case. However, unless someone can point me to something different, the HD4-MBX Cat 18 requires 4 separate 4x4 antennas. The 5gstore.com rep I worked with suggests that the antennas be spaced “1’-2’ apart”. The most obvious answer is a case that is 24"x24" with the antennas located at each corner; once you factor in the ~5" diameter of each dome, they’re about 18 inches apart.
The problem is, those 24" square cases are quite large and heavy. There’s a significant difference in weight and construction between a traditional rectangular case in the 20"x14" range and the 24"x24" cases.
So my question is, do I really need that much distance between the antennas? FYI the priority will be upload speeds, so I can see transmit interference being a concern.