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Worried about 5G?

smartcooky said:
If you are in your lounge, reading a book while sitting in your favourite chair, with your 5G mobile phone on the coffee table next to you, you are probably getting more radiation from your house wiring than you are from your mobile phone.
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If it’s light enough to read a book, you’re probably getting quite a lot of radiation from the window, or the light bulb.
 
Puppycow said:
Basically it just means a faster internet connection than 4G, which is what your current mobile phone probably uses, unless you bought a new one within the last couple years.

https://en.wikipedia.org/wiki/5G



ETA: All that said, 4G is already pretty good as far as I'm concerned, so you might not notice. These incremental changes do make a difference though in the long run, even if you don't notice a big difference from year to year. Just compare a new smartphone to what was available back in the 1990s, for example.
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This was kind of my impression, although it must be a significant improvement to warrant all those snazzy new towers, and being a rival for conventional ISPs.
 
Apparently the airlines have some concern about 5G. I'm no expert on this, but it sounds like a part of the RF spectrum that the FCC wants to open up to 5G (C Band) is very close to the frequencies that aircraft radio altimeters use.
 
LongFuzzy said:
Apparently the airlines have some concern about 5G. I'm no expert on this, but it sounds like a part of the RF spectrum that the FCC wants to open up to 5G (C Band) is very close to the frequencies that aircraft radio altimeters use.
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OTOH, that’s nothing to do with the objections that the anti-5G idiots have.
 
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LongFuzzy said:
Apparently the airlines have some concern about 5G. I'm no expert on this, but it sounds like a part of the RF spectrum that the FCC wants to open up to 5G (C Band) is very close to the frequencies that aircraft radio altimeters use.
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Shouldn't those instruments be tuned a lot finer than ' close' when it comes to critical data? Not to mention the data packets themselves should be fairly distinguishable..

" 1300 feet? No wait, that was $1,300 for a new Coach handbag... "
 
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Skeptical Greg said:
Shouldn't those instruments be tuned a lot finer than ' close' when it comes to critical data? Not to mention the data packets themselves should be fairly distinguishable..
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Data packets are meaningless when to comes to radio interference. A transmitter broadcasting on the same frequency as a radar altimeter could either cause erroneous readings or stop it working altogether depending on whether it is a high altitude Pulse Modulated type or a low altitude FMCW type.
 
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Mojo said:
OTOH, that’s nothing to do with the objections that the anti-5G idiots have.
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Well, the thread title is "Worried about 5G". Sounds to me like some airlines and aircraft manufacturers are worried.
 
Skeptical Greg said:
Which ones are those, and what evidence do they have that it is a problem?
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Aske and ye shalle receive....

https://www.cnbc.com/2021/12/15/us-airlines-warn-5g-wireless-could-cause-havoc-with-flights.html

(NOTE: This was the very first Google result to the search "airlines concerned about 5G")


More:

https://www.travelawaits.com/2718455/5g-airline-flight-safety-landing-concerns/

https://www.reuters.com/business/ae...ss-could-cause-havoc-with-flights-2021-12-15/

https://www.wsj.com/articles/airlines-brace-for-flight-restrictions-in-5g-standoff-11639929603

In fact, here are the search results... click on this link and take your pick...

https://www.google.com/search?q=air...IAaA6kgEGMi0zMC4xmAEAoAEBsAEA&sclient=gws-wiz

Skeptical Greg said:
"Sounds like" is best reserved for social media..
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This is not some "social media" thing as you suggest. Those of us who have had careers in Aviation and, even though retired, still keep up with developments, have known about this for months.
 
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Radio altimeter/radar altimeter — Airborne electronic devices capable of measuring the height of the aircraft above the terrain immediately below the aircraft. They operate in the 4.2–4.4 GHz band. Use of the radio altimeter is integral to terrain awareness and warning systems and to the landing of aircraft during CAT 2/CAT 3 approaches, for example.

A move by the U.S. Federal Communications Commission (FCC) to allow 5G telecommunications systems to use the 3.7–3.98 GHz frequency spectrum presents a “major risk … of harmful interference” with radar altimeters on civil aircraft, according to new research by RTCA.

https://skybrary.aero/articles/radio-altimeter-interference

The concern is that there could be interference between the 3.7-3.98GHz band and 4.2-4.4GHz band. I think the FCC position is that there is enough 'space' between these bands. The airlines and manufacturers position is that there is not.

If I understand how the systems work, the aircraft could stop receiving altimeter information. (I don't think they would get incorrect info, like showing the plane at 100' while it is actually at 50' or something like that. But I am not an expert in this, and I don't know exactly what would happen. In normal landings it shouldn't be much of an issue, but in foggy (low visibility) landings, it could be an issue.)

Any of you that are more knowledgeable please correct any info I may have incorrect.
 
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