a*e
2 楼
准定会有影响的,具体到什么影响,因为手机出现不过20多年,具体到导致癌症还是基
因突变还是智商蜕变,都还没被证实
不过,自从人类使用电以来,人类的癌症发病率一直稳步提高,还有后来的艾滋、禽流
感、疯牛病等等等等,比起来,有电之前的天花、霍乱什么的,都是小儿科了
因突变还是智商蜕变,都还没被证实
不过,自从人类使用电以来,人类的癌症发病率一直稳步提高,还有后来的艾滋、禽流
感、疯牛病等等等等,比起来,有电之前的天花、霍乱什么的,都是小儿科了
n*9
3 楼
no!
m*y
6 楼
典型的cell tower。
老汉是不信什么辐射的,但这种射频辐射比高压线的几十赫兹,对人体影响要大。
老汉是不信什么辐射的,但这种射频辐射比高压线的几十赫兹,对人体影响要大。
w*a
8 楼
这个没看见base station的方向天线。我怎么看像接收塔。。。
你得拍塔上的东西才能判断。
你得拍塔上的东西才能判断。
F*Q
18 楼
when I left colleague many years ago, beam division multiplexing with phase
arrays was discussed a lot, I don't know how widely it has been implemented
so far.
【在 m***y 的大作中提到】
: Nod, changes are coming. For the densely deployed LTE small cells, most of
: them would be using omni.
: Ideally, beam forming should be utilized, but that's still kinda too
: expensive for smaller cells.
f*i
19 楼
only for wireless N networks
sectional antennas are the current choice.
2x2 MIMOs are being discussed for future LTE standards.
phase
implemented
【在 F***Q 的大作中提到】
:
: when I left colleague many years ago, beam division multiplexing with phase
: arrays was discussed a lot, I don't know how widely it has been implemented
: so far.
sectional antennas are the current choice.
2x2 MIMOs are being discussed for future LTE standards.
phase
implemented
【在 F***Q 的大作中提到】
:
: when I left colleague many years ago, beam division multiplexing with phase
: arrays was discussed a lot, I don't know how widely it has been implemented
: so far.
F*Q
21 楼
you could have googled, but here you go:
http://en.wikipedia.org/wiki/Omnidirectional_antenna
【在 A******D 的大作中提到】
:
: Nod个啥, dipole也是有方向性的,上下方向就没有信号。
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