Should you keep WiFi access point as far as possible, or is your intuition about non-ionizing radiation completely wrong?
Discussion
Play with the app here:
https://juraj.bednar.io/assets/rf-simulator/rf-simulator.html
RF absorption in human body is not linear in terms of both frequency nor location inside body, which is the whole point of making very complex SAR models for specific case studies.
You are right. SAR is more complex than simple power density because of tissue resonance, penetration depths, and the non-linear way the body absorbs different frequencies.
My goal with this post wasn't to replace a high-fidelity 3D SAR simulation, but to provide a 'macro' comparison of the primary variables we can control: distance and transmit power.
Even when you account for the complex absorption profiles of brain tissue, the orders of magnitude difference in distance and power between a phone and an AP remains the dominant factor for total exposure.
you compare energy level but not how they are absorbed in materials
so its mostly useless text
So based on your study… if you have to use cellular connection, 5G is safer than 4G? Am I correct? Have you also taken into consideration the difference in wave length between the two?
No, I did not say that. I've only said they mmWave are usually closer to you and do beamforming, but mmWave is not used much outside of very concentrated areas.
BTW 5G often uses the same frequencies as 4G, they mainly added the 3.5GHz, most of the other frequencies are rarely used (where I'm at at least). 3.5 is between two wifi (2.4 and 5GHz).
Thank you, understood… I asked it because power-wise, all three power indicators are lower with 5G MMWAVE than with 4G…
Because the access point has to be closer in mmWave. The distance is not up to scale in the simulation.
Correct! Good point! I assumed that the distances were comparable… so in the end it is not clear what is safer for humans…
I think you can't even say, because 5G uses many frequencies, so the question is - what kind of 5G?
What would be cool is if your phone allowed you to choose which frequencies are you willing to talk on.
FUD. At even huge usage levels safe with a wide margin. 25 year evidence.
Bluetooth headsets even safer by many dimensions.
If you insist on being totally irrational and worried, just use a wired headset.
There can't be evidence that it's completely safe, although I would agree with you on both counts, I use Bluetooth as well.
The point of the original article is - if you believe it's a problem, don't be irrational to prefer much stronger signals just because you are worried about the little antennas. Antenna closer to you makes your phone broadcast much less. Prefer wifi mesh over a single access point (phone has to transmit only to closest ap, not through the walls - and all modern phones adjust transmit power). And prefer wifi to mobile, there's an order of magnitude difference in power.
And transmitter you hold in your hand is much more important (n^2 of distance) than the far transmitter of access point.