美国5G联络图
The "G" in 5G doesn''t stand for gigahertz or gigabit. It stands for "generation". It''s a global standard developed mostly in Europe. Here is a brief timeline of standards:Pre-1G: the MTS, or Mobile Telephone System. Built in the late 1940''s. It sucked, and you can ask me why.
1G: the analog AMPs system, the first true cellular system, developed in thelate 70''s, first deployed in Chicago in 1984.
2G: CDMA/GSM3G: EVDO/HSDPA4G: LTE/WiMAX (WiMAX mostly defunct)
As for health effects, no health testing has been done, at least that I haveheard/seen. Regulation of the radio deployments is forbidden at the state/local level under the 1996 Telecom Act.
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