re: "They installed the 5G apparatuses all over the place" & "I also recall hearing years ago that 5G millimeter waves ..."
Q: What is millimeter wave (mmWave)? A: Millimeter wave (mmWave), also known as millimeter band, is a range of electromagnetic frequencies between microwaves and infrared. The mmWave band contains wavelengths between…
re: "They installed the 5G apparatuses all over the place" & "I also recall hearing years ago that 5G millimeter waves ..."
Q: What is millimeter wave (mmWave)? A: Millimeter wave (mmWave), also known as millimeter band, is a range of electromagnetic frequencies between microwaves and infrared. The mmWave band contains wavelengths between 10 millimeters (at 30 gigahertz) and 1 millimeter (at 300 GHz.)
FOr the last few years, the telecom companies have been using, have been converting their spectrum in the lower 'microwave' spectrum, the cm or centimeter wavelengths (cmWave), from 3 to 30 GHz to 5G protocols from 4G LTE protocols as more smartphones are capable of 5G signalling and protocols.
From a practical standpoint, 5G protocols are being implemented on the sub 6GHz frequencies, in notably 'traditional' cellular frequencies between 600 MHz and 3.3 GHz and supplanting 4G LTE protocols.
Remember, 5G is actually a set of over-the-air (and to a lesser degree network) "protocols" or signalling rules that phones and the networks obey or respect in order to handle wireless data and phone calls in an orderly and predictable manner. 5G frequency 'bands' in the mmWave area are noted to only cover out to a block or so, and used in high density coverage areas like stadiums, malls, and even in areas having dining and eateries nearby. 5G and these higher frequencies serve to 'off-load' traffic from longer range 4G LTE/5G lower freqs to those mmWave bands that have the shorter coverage distance. You won't find a 5G 'cell' with 5 mile or even 1 mile range, that's the province of 4G LTE lower frequencies (but in the future using 5G NR protocols that replace 4G LTE.)
re: "They installed the 5G apparatuses all over the place" & "I also recall hearing years ago that 5G millimeter waves ..."
Q: What is millimeter wave (mmWave)? A: Millimeter wave (mmWave), also known as millimeter band, is a range of electromagnetic frequencies between microwaves and infrared. The mmWave band contains wavelengths between 10 millimeters (at 30 gigahertz) and 1 millimeter (at 300 GHz.)
https://www.techtarget.com/searchnetworking/definition/millimeter-wave-MM-wave
FOr the last few years, the telecom companies have been using, have been converting their spectrum in the lower 'microwave' spectrum, the cm or centimeter wavelengths (cmWave), from 3 to 30 GHz to 5G protocols from 4G LTE protocols as more smartphones are capable of 5G signalling and protocols.
From a practical standpoint, 5G protocols are being implemented on the sub 6GHz frequencies, in notably 'traditional' cellular frequencies between 600 MHz and 3.3 GHz and supplanting 4G LTE protocols.
Remember, 5G is actually a set of over-the-air (and to a lesser degree network) "protocols" or signalling rules that phones and the networks obey or respect in order to handle wireless data and phone calls in an orderly and predictable manner. 5G frequency 'bands' in the mmWave area are noted to only cover out to a block or so, and used in high density coverage areas like stadiums, malls, and even in areas having dining and eateries nearby. 5G and these higher frequencies serve to 'off-load' traffic from longer range 4G LTE/5G lower freqs to those mmWave bands that have the shorter coverage distance. You won't find a 5G 'cell' with 5 mile or even 1 mile range, that's the province of 4G LTE lower frequencies (but in the future using 5G NR protocols that replace 4G LTE.)
AS to exposure, here is a compendium of reports and data on that aspect: http://www.emfandhealth.com/