Is it true that the more antennas a router has, the better the signal and faster the speed?

Just like the principle of Superman becoming stronger with just one punch, routers do not become stronger because they have more antennas, but because with MU-MIMO, routers with more antennas have the opportunity to become stronger.

Don't look at the number of antennas in the router, carefully check how many MU-MIMO channels it supports
Budget allows for direct purchase of Wi Fi 6 routers, even 2.4GHz devices can benefit from this
If the router is a directional antenna, remember to pair the antennas according to the left and right relationship when networking, with angles of 45 ° and 135 ° respectively 4G Cat4 Cpe
MIMO (Multiple Input Multiple Output) technology refers to the use of multiple transmitting and receiving antennas at the transmitting and receiving ends, respectively, to transmit and receive signals through multiple antennas at the transmitting and receiving ends, thereby improving communication quality. It can fully utilize spatial resources and achieve multiple transmission and reception through multiple antennas. Without increasing spectral resources and antenna transmission power, it can exponentially increase the system channel capacity.

In the 2.4GHz era of wireless routers, SU-MIMO technology, also known as "single user multiple in multiple out" technology, was adopted. In fact, when routers were working, they queued all connected devices and then, based on the logic of the processor and firmware, issued network requests to each device one by one or in turn. 4G CAT6 CPE

When there are few connected devices and the workload of the devices is low, such as when everyone is browsing the web, the gap time between switching and rotation is of course very short, which can be ignored and gives people the feeling of "always connected", and the experience is good.
But when there are too many connected devices and the workload is high, for example, 10 people are all watching 4K high-definition online videos, the app defaults to buffering the video content for 15 seconds, and 10 people are downloading "Squid Game" at full speed in Thunder - that's like queuing up for a meal, the better router logic is like Haidilao, and there are also some tea, snacks, and drinks to maintain a basic network experience, I almost made your app go around the world - wait until the previous device network request is completed before we can talk.
And this MIMO technology is the origin of the myth that "the more antennas, the faster the speed": each antenna can form an independent path and then have everyone's devices queue up.