Your Iskra antenna has much better gain than either LHG or ATL, specially on the lower frequency bands. The signal strength you mention (better than -80dBm) is pretty goid but doesn’t say much about CC feasibility. To assess that, you should measure signal strengths on all supported frequency bands (use cell lock function for that). Usable frequency bands are realistically only those with RSRP above -100dBm or so (decent SINR is also a must). If your measured signal strength comes from one of lower frequency bands (e.g. 800MHz), then it’s very likely that signal strength of higher frequency bands is considerably lower and LHG or ATL (with their slightly better than Iskra gain on higher bands) won’t make it much better … but will considerably degrade signal strength of low band cells (LHG and ATL have gain of 0 or even lower on lower frequency bands).
When thinking about 4x4 MIMO: also serving base station has to support it and that typically only happens on higher bands (e.g. frequencies of 2.6GHz and higher), on lower bands MNO s don’t bother. Additionally higher-order MIMO typically works good at shorter distances, 7km is quite far for mid- and high-frequency bands (but it really depends on measurements done on each band as I explained in first paragraph). If base station doesn’t support 4x4 MIMO, then such antenna on station side only slightly helps with better Rx (compared to similar 2x2 antenna)
In addition to what mkx wrote, to fully take advantage of 4CA at a distance of 7km you need clear line of sight to utilize the upper bands. If that’s the case and all the required bands are avaiable, ATL would probably be a good fit.
EG18-EA module that is used in the LHG LTE18 can do up to 5CA (up to 100mhz spectrum) and that is with 2x2. Of course not every country/operator supports that. Please see the Carrier Aggregation spreadsheet file that is available int he LHG18 download page: https://mikrotik.com/product/lhg_lte18#fndtn-downloads
Which of those 2 has better gains? I’m considering buying one of the mentioned products. Best BTS/carrier tower is 7.2km away from me it has 4CA . I’m currently using it with transfers up to 250mbit/s with standard outside antenna connected to a LTE router via h155 concentric cable. But I get only faint 2600mhz band at night and in early mornings otherwise it drops well below 100mbit/s.
Also I’m testing a ODU antenna from T-Mobile Poland which gives decent results for a hand sized antenna. Also is there any future proof product that can use 5g signal?
I will buy one of those products I just need an advice which is better for such distances.
Thanks in advance