Best Antenna for LTE Bands (1800, 2100, 2600) Aggregation: Huawei B715 & Cybertech 17dBi MIMO

Hevce wrote:

"Antenna Dual LTE-A / 4G 17dBi MIMO 1800-2600MHz" from Cybertech will be a good choice, will I find something better?

If without the 800 band, the antenna is fine. As one of the few, it has almost full technical data, and more importantly - its parameters match. And that speaks well for her and the producer.

Hevce wrote:

From what I read, this antenna has a bit mixed opinions, but most are positive.

In principle, there are no perfect antennas, each of them has some minor or major disabilities, contrary to what is listed in the technical data. So that in each case each antenna will behave differently, although this one should behave as it should practically always.

As for opinions, however, each is subjective. However, not everyone knows how to use an antenna, not everyone can choose an antenna, not all conditions are optimal for a given antenna, etc. - and here there are negative opinions, usually unfortunately not having much to do with reality. On the other hand, there are hurray-optimism like "because it worked for me!" - sometimes against all logic or need, which again does not give much to the seeker ...

Antenna like an antenna, but if you plan on a longer cable, more than a few meters, then antenna cables begin to be used, especially when receiving weak signals.

Let's say it's the decency minimum at 2600.

Typical attenuation for 5 meters of cables at 2600MHz:

H1000___ 1.3dB

LMR-240_ 2.2dB

H155____ 2.7dB

Symbolic differences (except H1000), although if someone is fighting for every dBi of gain from the antenna, there is something to fight for.

I would use LMR anyway

_cheetah_ wrote:

I would use LMR anyway

Sorry, I automatically entered the name of a different cable, but of the same class as the RF240.

matek451 wrote:

It is pointless to discuss the selection of a cable without knowing the signal parameters outside on individual LTE bands,

And I will not agree here. The antenna cable is an independent part of the antenna installation and should generally always be of the best possible parameters, especially shielding. The higher the bandwidth, the longer the length, the more the attenuation becomes important.

The transfer speed, apart from the BTS limitations, is directly determined by the quality of the received signal. This in turn, depending on the circumstances, depends on the signal level and the compactness of all disturbances in the signal. It must be remembered that the home is also a place where we have (or may have) a high level of interference.

And a weak cable with low shielding is very susceptible to all kinds of debris from the air that can have a negative impact on the quality of the signal reaching the router's ports. In TV technology, with a weak antenna cable, good TV reception can be canceled using a poor HDMI cable, which may be hard to believe, but it happens ...

Sure, the choice of the cable used will usually have a negligible impact on the transfer rates, because these depend mainly on other elements of the installation, but if the installation is well suited to the received bands and consists of good elements, then the chances of a long-term, stable transfer.

matek451 wrote:

In the case of purchasing an antenna from Cybertech at 1800-2600MHz and selecting a cable with lower attenuation, the version with 2 N) connectors is purchased z) led to the antenna housing and 5M cables with N (m) -SMA (m) connectors are purchased.

And that is a completely different question, here we are talking about technical possibilities that can influence the choice.

Well, it's not exactly that perfect - the situation, apart from the 1800 and 2100 levels, does not look good. The programs report RSRQ / SINR respectively:

1800 :: -13.5 / -4 (!) And -13 / -6 (!)

2100 :: -11.7 / -1.3 (!) And -12 / -5 (!)

2600 :: -7 / 10 and -4 / 19 - here it is OK

A :: -7 / 14 and -7 / 12 - here it is also quite OK

Aside from the fact that the SINR indications can be differently displayed by the equipment and do not have to be very reliable (the negative indication shows more noise and interference than the useful signal, i.e. de facto no possibility to establish transmission), RSRQ also clearly shows some problems. It looks to me as if the antenna is catching extraneous emissions at 1800 and 2100.

Comparing these results to singles and router aggregation without an external antenna - post # 13:

A :: -6 / 12 and -6 / 13

from the reception point of view, apparently little has changed in aggregation - probably, looking at the singles results, aggregation without antennas was dominated by the 2100 band, and with the antenna - 2600. But, it seems that earlier there was much less interference than the aliens 1800 - 2100.

Because BTSs do not have continuous emission, but in fact 'shoot' consecutive packages. Hence, depending on the moment of measurement, there may be more or less interference from extraneous emissions. I don't insist that you do, but it seems so to me.

It may be that without an antenna you had little signal and that could be causing problems. But the foreign emissions were so small that they did not interfere with the reception, 'hiding' in the generally perceived noise. With the addition of the antenna, both the usable and the noise levels increased ("getting out" above the general noise), and then you got a problem - you improved the 2600 band significantly and made trouble on the 1800 and 2100 bands.

Summing up - it all looks like an antenna with too much gain at 1800 and 2100.

And to verify this - question - do you have some 'foreign' BTS +/- in the front hemisphere in the direction of the antenna?

As you can see, the high gain in pick-up (single km) can be a disadvantage.

"Alien" in any sense different from that with which you are connected.

I have already found - you are within the range of BTS from ul. Królewiecka 1 and probably the one from Polna 2A.

Try to use the good directional characteristics of this antenna to 'lose' this annoying company - you would have to turn it to the right (westwards) until the RSRQ and SINR readings improved. In this case, don't worry too much about the level, because you have a spare. You can look there - a similar situation -> Link

The X polarization antenna is hung as shown in the picture. It doesn't matter which cable to which connector.