Antenna Current Distribution
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
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.
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?
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