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Wi-Fi Exposure

Dave Molta replies: Almost all WLAN radios are low-power devices, with output of less than 100 milliwatts. By way of comparison, most walkie-talkies sold to kids have an output power of 100 milliwatts--and unlike WLAN radios, those devices are held to the head, increasing the radiation exposure.

Upgrading from a 2-dBi to a 6-dBi WLAN radio antenna would result in an EIRP (effective isotropic radiated power) of 230 milliwatts in immediate proximity to the antenna. This output is still a lot less than the 1,000 milliwatts or more generated by cell phones.

Most of the studies I've read about the potential health effects of cell-phone radiation conclude that the risks are negligible. It seems clear that for WLAN devices, the risks would be even lower. But if you want to be extra cautious, consider some of the new MIMO (multiple input/ multiple output) systems that extend range without increasing radio output power.

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