In this definition, we arbitrarily set ˆl, the real-valued unit vector indicating the direction of le, equal to the direction in which the electric field transmitted from this ...In this definition, we arbitrarily set ˆl, the real-valued unit vector indicating the direction of le, equal to the direction in which the electric field transmitted from this antenna would be polarized in the far field. The vector effective length le=ˆlle is defined as follows: ˆl is the real-valued unit vector corresponding to the polarization of the electric field that would be transmitted from the antenna in the far field.
