2014-08-21, 17:32
(2014-06-27, 07:53)jumpjack Wrote: What about energy? Can it be estimated based on how much energy reaches the antenna of various detector, being radiowaves just energy?
mmh, theoretically...
If you would know the k-factor (k) of your (electric) antenna and you could measure the voltage at the input of your receiver (v),
you can determine the field strength (E) that the antenna is exposed. *)
E=k*v
From that you could derive the power density E in W/(m^2)
P=E^2/(120*pi)
I guess then it becomes complicated to determine the energy (what's the area? pulse profile? ...).
*) google for: Hewlett Packard AN 150-10. Spectrum Analysis - Field Strength Measurement.
(an older one from 1976 or so)