I'm not sure about some of your descriptions (antenna connected to the PoE port? Really?)
- but it seems like you're planning to use an MR52 as a wireless adapter for your PC that doesn't have native WiFi? This does seem overkill, compared to - for example - just buying a USB wireless adapter. I guess, if you already have the AP and nothing better to use it for...
It's just possible you may be trying to connect over an extended distance, meshing to an existing meraki AP, using some kind of directional, high-gain antenna, in which case you'd probably want an AP with external connectors, such as an MR42E / 46E / 53E and choose the appropriate, compatible antenna for your needs.
You would need to follow the setup from here: https://documentation.meraki.com/MR/Client_Addressing_and_Bridging/Port_Profiles#:~:text=Meraki%20H%....