I want to improve the LTE signal that I receive indoor where I work and after some researching I'm thinking about a passive LTE repeater (Outdoor Antenna <--> Cable <--> Indoor Antenna).
However; I am not sure which LTE antennas to buy.
The LTE bands that I want to repeat are mainly:
- B20 ( 800 MHz)
- B8 ( 900 MHz)
- B3 (1800 MHz)
- B1 (2100 MHz)
- B7 (2600 MHz)
with my mobile operators in Italy being:
The nearest LTE BTS to which my phone connects are:
- 4G+ 4CA (B7 B1 B3 B20) [2 km away]
- 4G+ 4CA (B7 B1 B3 B20) [8.5 km away]
This is a NetMonster screenshot from indoor room R1 ground floor.
and this from outdoor point A
My Speed Tests from room R1 are:
While from the outside at pint A, the results are much better.
The building is as follows, divided in two floors (3M + 3M high)
and I want to improve the LTE signal in the room R1 (groud and first floor) by installing a passive LTE repeater with two antennas in points A and B connected via a coaxial cable (in red).
The LTE BTS are located on the left of point A.
Which are the best LTE antennas and coaxial cable to use in this case? For the outdoor antenna I think it is betteter an omnidirectional MIMO considering that there are two near BTSs and the outdoor signal is good enough. Regarding the indoor antenna I don't known what to use. Is a generic MIMO good enough? Do they have a specific name?
Will the indoor antenna installed at point B be able to improve the signal also for rooms R0, R2, R4 ?
Are the NETGEAR 6000451 omnidirectional https://amzn.eu/d/aHk3mko and the KASER K5GPB14V3 180° directonal https://amzn.eu/d/8qF74CU ok for my case?
Update 1
The outdoor antenna is installed at 6 meters from the ground, while the indoor antenna is at 2.5 meters from the ground.
I first bought the KASER K5GPB14V3 180° and the NETGEAR 6000451, connected them using the pair of 10 meters coax cables, and I was able to get around 5 times the speed (both download and upload) I had without them, but only if I literally placed my phone on top of the NETGEAR indoor antenna.
I thought it was the fault of the indoor antenna, so I replaced it with a Kaser OmniDirectional https://www.kaserstore.com/collections/mondo-4g-5g-lte/products/kaser-antenna-5g-4g-lte-esterno-mimo-omnidirezionale-698-2700-3300-3800-mhz-guadagno-fino-12-dbi-cavi-da-10m
The two antennas are now connected using the 20 meters pair of cables, however I can not notice any improvement even with the smartphone placed on top of the indoor antenna. Is it due to the length of the cambles? I may connect them using just the 10 meters cables by using another pair of connectors, but I fear it will not have enough power to cover at least room R1.
Which amplifiers should I buy if this is the case? Do I need a Bi-Directional Amplifier (BDA)? Can I replace a BDA with two amplifiers (one to amplify the oudoor antenna and the other to amplify the indoor antenna)? E.g. HTOOL HT004 100K-6GHz https://it.aliexpress.com/item/1005005950859267.html Notice that each antenna is MIMO and has two cables.
Update 2
Now the setup of the antennas is as follows:
A KASER MIMO 180° = 6 meters from the ground
B KASER OMNI 360° = 2.5 meters from the ground
The red line connecting the antennas are two cables of total length 20 meters. I would like the antenna B to serve at least both the ground and the first floor of room R1 and the top half of room R0 at ground floor.
