Pigtails require IPEX4 in small sizes, so keep that in mind. There are usually too near holes for SMA connectors, and the plug-in connectors to the MP interfere with the antennas, so I would not advocate placing them there. If the antennas are only rotary dipoles on the connector, they should be tilted in opposite directions and mounted on a bracket within the casing, with at least four to five centimeters between them as recommended by the manufacturer. In this situation, the use of two antennas will result in typical transmission rates and cognitive processing. In cases when there is a lack of free space, as is the case with my son's mini-PC, it is preferable to leave one antenna linked to the main socket. While gigabit speeds won't be possible here, you may expect speeds and delays of several hundred megabits per second to be more consistent. You might also try using an external antenna, but this has its own set of problems (in my opinion, even more so).
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