Here i will post some graphics to help you choose right connectors
There is also problem with u.fl and w.fl connectors. Here you will find diagram how to find differences between them. Generally w.fl (IPEX4) connector is smaller.
And here’s comparison of most popular connectors used in RC applications.
Counting from above:
-SMA connector,
-U.FL,
-IPEX4,
-MMCX straight,
-MMCX angle)
