We did a lot of testing of external RP-SMA antennas on a different gateway provider. Same form factor, same size, just different vendor. The problem we kept running into was output power from the gateway itself. No matter how big the antenna was, or what it promised, the included gateway antennas provided roughly the same output because the gateway was the limiter on the power, not the antennas. Often, because of the severe signal fall-off in the cable, an external antenna placed just a few feet from the gateway was significantly worse than the screw-on antennas. It was theoretically worth it for us as some of our locations have the network cabinet behind a steel or thick cinderblock wall, so signal loss was already severe. We investigated the antennas because we planned to run the cable through the ceiling and install it in the ceiling tile above the point of sale counter. Even with the signal loss from the cable, it would still be better than the nearly non-existent signal from the included antennas. The only improvement we saw overall from using an external antenna was when we utilized a directional antenna and pointed it directly at the Point of Sale counter. That seemed to "jump through" the wall and provide decent signal at the POS, but there was almost no signal anywhere else (as expected). We investigated a few antenna providers, and the one we finally decided on was Panorama Antennas. They shipped us a bunch of POC units and we tested them extensively. For the ceiling drop, we decided on this model: https://panorama-antennas.com/product/cmx-24-58-2-low-profile-mimo-wifi-antenna/ And for the directional, we decided on this: https://panorama-antennas.com/product/wmmx9g-24-72-nj-directional-mimo-antenna-2-3-7-2ghz/ Now, all that to say: We ended up pivoting away from that solution entirely in favor of an external access point and have not deployed this en masse to the field, but I was happy with these antennas. If you reach out to Panorama, they will likely ship you a POC unit to try with the MX68W. Also: Not affiliated with Panorama in any way. Just liked their product.
... View more