Antenna Current Distribution

[Slayerza]

Hi,
Suppose that I have simulated a number of dipole antennas in SuperNEC, only one of which serves as a 1W transmitter. Is it possible to use the current distribution of the receiving antennas to calculate the received power?

If so how do I go about this?

Thanks
Slayer

 

[vfone]

No you can’t. The current distribution is proportional to the Reactive Near-Field. This is the region close to the antenna where the Electric-E and Magnetic-H fields are not orthogonal and where the antenna gain is not a meaningful parameter, so you can not use for a link budget calculation.

 

[Slayerza]

But, NEC uses the current and the voltage through the excitation segment to determine the impedance of the antenna. Thus if I use the current through the load of the receiving antenna I should be able to calculate the power delivered to the load and thus subsequently the power recieved by the antenna.

For the power calculations I would use Pr = real(0.5*abs(Ir)^2*Zl)
Where : Pr - Power recieved
Ir - Power in load segment
Zl - Impedance of the load

Why will this not work?

 

[airman]

I think it will work iam trying to do near-by calculations not using NEC but MININEC small version of NEC, easy to use and you can find MININEC version 3 free on the net
it nearlythe same as NEC code but only for wire antennas