Hello
Im about to buy https://mikrotik.com/product/mant_lte_5o
But there is no cable icluded, i searched for smaM smaM cable, but found nothing. So i wonder can i buy similar? https://www.eurodk.lt/e1/products/coaxial-cables/coaxial-cable-n-male-sma-male-10m-duplex-gold
Mikrotik is offering 1 metre SMA-SMA cable (you need a pair of those). If this is not long enough, then you can purchase some SMA extension cable and combine that with SMA male/male connector.
But try to avoid using long cables (generally anything longer than 3 metres). Cable loss reduces LTE signal which means reduction of LTE throughput.
So i need smam<–>smaf + smam ↔ smam?
As both chateau and MANT have female SMA connectors, you need cable with male-male connectors. If you can’t get cable with M-M connectors of desired length, you can use cable with M-F connectors and a M-M adapter (which kind of converts the F-end of cable to M needed to connect to either of devices).
And a bit of theory:
I don’t own a chateau, so I’m just looking at publicly available photographs. There are a few useful photographs published on this page. So there are two SMA connectors on the back side (labeled ANT1 and ANT4) and are connected to ports labelled MAIN and DIV on the main board. So you can directly connect external LTE antennae to these two connectors using a pair of SMA male-male cables (as I described in my previous post). I guess chateau notices higher signal levels coming from external connectors and uses those instead of corresponding internal antennae.
What then remains are LTE connectors labelled MIMO1 and MIMO2 available on main board and connected to antenna placed at the top of housing. Now about LTE state-of-art: minimum number of LTE antennae any device should have is 2 (for 2x2 MIMO). Newer categories added support for 4x4 MIMO which requires use of 4 LTE antennae. However, most networks (if not all of them) only use 4x4 MIMO for high-frequency bands (e.g. frequencies 2.5GHz and above). Quite likely those two additional antennae available inside chateau (MIMO1 and MIMO2) are used in same manner. But when you need to use external antenna (due to low signal strength), it is highly likely you’ll be using low-frequency bands (such as 700, 800 or 900 MHz) where only 2x2 MIMO is used and use of 2 antennae is enough.