Cisco wireless router wireless routers manufactured linksys54G
● Connect the wireless router device for Apple produced iphone4s retnia macbook pro computers and mobile phones, as well as the Samsung 719 phone.
Beijing News News With the increase in household Internet devices, a network cable port is far enough, a wireless router to become the choice of many people. All along, many people are skeptical of the wireless router, questioning the radiation on the human body harm, and even friends called the amount of radiation produced or potentially carcinogenic. The radiation situation then wireless router how to do? Any impact on human health? July 16, Beijing News reporter with the Beijing Environmental Science Society Yuan Yuming together, conducted radiation experiments on the wireless router.
The experiments were on standby and working wireless router in two states made radio emissions testing Pink Case for iPhone, testing tools for integrated field strength meter.
Yuan Yuming introduced, according to the frequency of the transmitted signal wireless router, suitable for “environmental electromagnetic radiation intensity grading standards allow” “Electromagnetic radiation protection”, “environmental electromagnetic health standards” and other regulations and technical standards of the “30 trillion-30G” this band radiation limit requirements, ie 0.4 watts per square meter, the standard lower than the EU standards several times.
It was found that the value of the wireless router and its working status of the radiation from the close, working conditions, the maximum instantaneous radiation of 0.2 W / m, while the standby radiation only 0.01 watts / square meter; half a meter, the wireless rapid decay of the amount of radiation the router, then the value of the daily use of 3G mobile phones radiation values almost.
While the above tests showed radiation values were lower than the national standard, but experts suggest that the wireless router is best placed half a meter away from the body from the outside, you can turn off the power when not; avoid cell phones, microwaves and other radiation caused by the use of devices simultaneously additive effect of radiation. In addition, the case does not affect the use, but also by reducing the number of ways a wireless router antenna to reduce radiation.
1 m away several hundred times the radiation attenuation values
Experimental Objective: To test the wireless router in working condition resulting radiation.
Experimental procedure: The experiment operator to connect the computer to a wireless router, computer generated through the wireless router wifi download files from the Internet, the speed of 200k / s. Then, each will be consolidated Strength Meter stick beside the wireless router, wireless router, 0.5 m away from the office, at 1 meter from the wireless router, measured radiation values (results see table one).
【Explanation】 Beijing environmental science experts Society Yuan Yuming said that the wireless router status radiation values are closely related to their work, in connection with a computer to download data at a high flow state, its radiance values will be relatively high, even for an instant there a relatively high value. And half a meter, the wireless router quickly attenuated radiation.
Standby lower radiation values
Experimental Objective: To test the wireless router in the standby mode generated radiation.
Experimental procedure: cut off all of the wireless router with wifi connected devices produced, respectively, will be consolidated Strength Meter affixed beside the wireless router, wireless router, 0.5 m away from the office, at 1 meter from the wireless router, measured radiation values (see table results two).
【Explanation】 Yuan Yuming expert recommendations, although even posted on the edge of the wireless router, the radiation values are in line with national requirements, but long-term use of the wireless router, then the best place is at a distance of half a meter or more from a seat, “especially careful not to put Bedroom bedside or near the area of the regular activities of the child, as compared with adults, children less resistance to radiation. ”
Phone 2G mode radiation greater
Experimental Objective: To test the cell phone radiation, and the wireless router in order to compare the amount of radiation.
Experimental procedure: The Comprehensive Strength Meter stick beside the wireless router, wireless router, 0.5 m away from the office, at 1 meter from the wireless router, measured radiation values. Samsung 719 were tested tone for China mobile phone (microblogging) 2G in GSM mode, the Samsung 719 phone call to China Telecom (microblogging) 3G, CDMA2000 mode, iPhone4s in China Unicom (microblogging) 3G WCDMA mode of the radiation values (results see table three).
【Explanation】 Yuan Yuming experts said three experiments, wireless routers and mobile phones are in line with national standards is not higher than 0.4 watts / square meter requirements. Wireless router half a meter outside the basic and daily radiation values using 3G mobile phone radiation values almost.
This test, there is the maximum radiation pattern of China Mobile’s GSM 2G 0.3, which Yuanyu Ming explained that this is the operating mode from 2G to decide, in the 2G era, the base station is a full power of the transmitted signal to the user . The 3G base stations can be adjusted at any time according to the user’s distance power. It can also remind you, if you want to minimize the radiation, should choose a 3G handset mode. It should be noted that, although some phones support 3G mode, but some people because of the trouble, and other reasons do not want to change the number or use the phone’s 2G standby and talk mode, it is impossible to decrease the effects of radiation.
Can reduce the antenna to reduce radiation
Exceeds the intensity of electromagnetic radiation, can be regarded as electromagnetic pollution, electromagnetic pollution although colorless and tasteless, but then there is the possibility of physical harm. Therefore, the family should minimize electromagnetic pollution, such as wireless router at night when you can not turn off the power; avoid cell phones, microwaves and other radiation caused by the use of radiation devices simultaneously superimposed effect.
In addition, the reporter found through other tests, the wireless router with three antennas, antenna radiation than a substantial increase. Thus, the wireless router’s antenna gain with radiation effects, so you can try to have three antenna wireless router is reduced to two or one, as long as the signal coverage can be used to meet.
If there are no mobile phones and other devices access to the Internet needs, you can use the network cable to the wireless router output cable interface with computers and other Internet devices connected (some wireless routers do not have the output network line interface), while removing all of the wireless router antenna to reduce radiation levels.