In an earlier post I mentioned the rather disappointing wifi signal strength of my Turris Omnia. Other users reported similar issues, so it looks like I am not the only one suffering. To put things into perspective: My router’s signal strength is about 75% compared to the previous COTS device (100%). Clearly, we are talking about #FirstWorldProblems here. 😢
It is still unclear why some devices remain under expectations.
- Is it a hardware issue? Or software?
- Is it the driver blob?
- Is there a problem with the connectors?
- Are the antennas broken?
- Could it be an issue with the two pre-antenna filters?
- Why are both bands affected?
I wanted to rule out antenna and connector issues to help the community find the problem. The idea is to replace the filters, stock antennas and stock HF cables. So I went on a shopping spree and bought five dual-band antennas with 5dBi gain and corresponding HF pigtails.
Two filters are connected upstream of the antennas on the left and right (red circles). The third antenna in the middle is directly connected to the 2.4GHz wifi card.
I replaced the filters and the gray stock HF cables. Each antenna is now directly connected to one of the wifi cards via pigtail. I also replaced the stock antennas, to refute the broken antennas theory.
No special tools were needed, there were already five SMA holes in the case.
And now the most important piece of information: Did it work? Unfortunately, no, I have not seen a significant improvement of signal strength, regardless which band I looked at.
At least we now know that a hardware issue including the antennas or filters is less likely. The quest continues… 📶❓