iPhone 12 Radiation Risk - a technical/regulatory view
Discussion
Having seen the thread in NP&E I thought a bit of background might help..
This is a typical system for measuring the amount of radiation (SAR) eminating from a radio device e.g. mobile phone.
https://speag.swiss/products/dasy8/overview/
The issue Apple has been hauled up on is basically because the French did not think the standard devices are tested to was correct and did not meet the legal requirement (The EU did agree with them), they requested the standard is corrected and implemented local rules to correct the deficiency in the standard while it was being corrected.
The issue is about the distance the phone is from a person's body during the trunk SAR test (SAR is a measure of the radiation absorbed in organic tissue) and trunk SAR is equivalent to the phone in your shirt or trouser pocket and right next to your skin.
The link below shows a SAR Phantom where the phone is either placed against the ear for head SAR (left or right ends) or the flat section (in the middle) for trunk SAR. The standard allows the phone to be up to 25mm away from the flat section and the French think it should be in contact or a maximum of a few mm away (<5mm)
https://speag.swiss/components/phantoms/phantoms-3...
Changing the distance from up to 25mm to <5mm and re-measuring it is no surprise the SAR is much higher and exceeds the 2W/kg over a 10g tissue volume limit.
As for a fix, I would expect Apple will use SW to limit the transmit power to reduce energy absorption and there will soon be complaints of poor radio performance but big increases in battery life.
This is a typical system for measuring the amount of radiation (SAR) eminating from a radio device e.g. mobile phone.
https://speag.swiss/products/dasy8/overview/
The issue Apple has been hauled up on is basically because the French did not think the standard devices are tested to was correct and did not meet the legal requirement (The EU did agree with them), they requested the standard is corrected and implemented local rules to correct the deficiency in the standard while it was being corrected.
The issue is about the distance the phone is from a person's body during the trunk SAR test (SAR is a measure of the radiation absorbed in organic tissue) and trunk SAR is equivalent to the phone in your shirt or trouser pocket and right next to your skin.
The link below shows a SAR Phantom where the phone is either placed against the ear for head SAR (left or right ends) or the flat section (in the middle) for trunk SAR. The standard allows the phone to be up to 25mm away from the flat section and the French think it should be in contact or a maximum of a few mm away (<5mm)
https://speag.swiss/components/phantoms/phantoms-3...
Changing the distance from up to 25mm to <5mm and re-measuring it is no surprise the SAR is much higher and exceeds the 2W/kg over a 10g tissue volume limit.
As for a fix, I would expect Apple will use SW to limit the transmit power to reduce energy absorption and there will soon be complaints of poor radio performance but big increases in battery life.
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