It is proposed to prove here in a very general way the reciprocity property of the antennas1 functioning in transmission or reception. This important property will take the form of a relationship between the ATF in transmission and reception (equation [3.24]).
For this we will follow the approach of Deschamps in [DES 66]. First of all let us consider the electromagnetic field in one point of space as a 6-dimensional vector:
In a source-free region of a linear medium, isotropic but not necessarily homogeneous, this vector verifies the following Maxwell’s equation, merging the two principal equations curl E + jωμ H = 0 and curl H − jωε E= 0:
From two solutions FI and FII of [A.2], corresponding to various configurations of the sources, we can form the cross product:
which is a three-dimensional vector, bilinear in Fα. The cross flux of FI and FII is defined as the flux of the vector FI ×FII through an oriented surface S2 and denoted as:
The cross flux verifies the following properties: ...