  International guidelines/standards for human protection from electromagnetic
fields have been revised recently, especially for frequencies above 6 GHz where
new wireless communication systems have been deployed. Above this frequency a
new physical quantity "absorbed/epithelia power density" has been adopted as a
dose metric. Then, the permissible level of external field strength/power
density is derived for practical assessment. In addition, a new physical
quantity, fluence or absorbed energy density, is introduced for protection from
brief pulses (especially for shorter than 10 sec). These limits were explicitly
designed to avoid excessive increases in tissue temperature, based on
electromagnetic and thermal modeling studies but supported by experimental data
where available. This paper reviews the studies on the computational
modeling/dosimetry which are related to the revision of the
guidelines/standards. The comparisons with experimental data as well as an
analytic solution are also been presented. Future research needs and additional
comments on the revision will also be mentioned.
