There is not a single answer to this question. However some 5G antennas will be suitable for most applications so could be considered the overall winner of the title “Best 5G Antenna”, but we must judge the antennas based upon their use cases.

For example, a Brilliant 5G antenna is the FB4X4MIMO but this is a dome antenna and is designed mainly for use with industrial routers for M2M remote management and monitoring applications and is designed for hole mounting on top of a metal cabinet. This 4×4 MiMo 5G antenna provides signal reception for the Industrial 5G router mounted inside the metal enclose where the metal casing blocks the 4G/5G signal. This antenna would not usually be suitable for a home or office as there are much better alternatives. so this gives a quick example of selecting the best antenna for the application and installation scenario.