The radiation generated by the commonly used IEEE 802.11b wireless device at a distance of 2 inches is about 2 microwatts per square centimeter. The radiation of IEEE 802.11g products is even smaller. The relevant safety radiation limit in the FCC is 1000 microwatts per square centimeter. Therefore, even if there are multiple WiFi wireless network devices in the same room, it will not have much impact on the human body. All wireless transmissions will have radiation problems. In theory, there are more health risks than wired devices. Tests have shown that
However, it should be noted that the above data is obtained under normal circumstances. In fact, some wireless routers or APs increase the transmission power to improve the coverage range. Wireless signal power amplifiers are also used in some office environments. In this way, the transmission power can reach 5000 milliwatts to 10000 milliwatts. For users close to the transmission source, this undoubtedly brings hidden concerns to their health.
The minimum transmission power of a GSM mobile phone is 3.2 milliwatts (standby), the maximum is 2 watts, and the call is about 1 watt to establish a connection, and then it lasts about 800 milliwatts
. The minimum transmission power
of a PHS is 10 milliwatts (standby), and the establishment of a connection and the call is no higher than 80 milliwatts.
CDMA is about 500 milliwatts when talking
Wireless APs are generally less than 200 milliwatts for 802.11G and less than 150 milliwatts for B. The greater the range, the greater the power of the AP. I bought a 200-meter 802.11G, which is 250 milliwatts.
The frequency of the AP is 2.4G, which is close to the frequency of PHS and CDMA. GSM is 800/1900MHz.
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