hi
I embedded an antenna in a lossy medium and I know the S11 and deliver power 1w but i don't know, how should I calculate the radiated power?
the return loss Figure is resonated at 402MHz to -20dB .
Is this solution sorrect?
S11=10log(P(ref)/P(inc)))=>
-20=10log(P(reflected)/1w)=>P(reflected)=0.01w
P(inc)=P(radiated)+P(ref)=>P(radiated)=0.99
=700) window.open("/down/20151206114409624.gif');" style="max-width:700px;max-height:700px;" onload="if(is_ie6&&this.offsetWidth>700)this.width=700;" >
but I have a lossy medium in which the antenna is located.that is
P(radiated)=P(pure_radiation)+P(Loss)
=700) window.open("/down/20151206114410424.gif');" style="max-width:700px;max-height:700px;" onload="if(is_ie6&&this.offsetWidth>700)this.width=700;" >
I know the SAR value 135(mw/g), but I don't know how should I calculate the P(Loss) and then the pure value of the P(pure_radiation).
so ,what's the solution?
p(accept)=p(incidence)*s21=0.99w
p(pure_radiation)=p(accept)*Q
那有木有Q值啊？
你知道sar没什么用吧，天线一定不是全向的吧，就算是，也反映不到该点的辐射能量密度，算不了辐射功率的吧。
sorry i don't understandexactly ,would you please explain more?
if the radiation pattern be something like this
how we can calculate the radiated power?
试着翻译一下楼主的意思，楼主是说把一个天线放置在一块有耗介质内部，现在想得到天线通过有耗介质辐射至自由空间的总功率，是吗？
如果是实际测量，楼主要如何得到这个参数？
PS：如果可能的话，用自己的机器敲汉字吧。
I found out how should I calculate the radiated power it is calculated from the radiation efficiency of the antenna
radiation efficiency=P(radiated)/P(delivered)
in which the P(delivered)=1w
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