  In this paper, we prove that two parallel dipole antennas can be decoupled by
a similar but passive dipole located in the middle between them. The decoupling
is proved for whatever excitation of these antennas and for ultimately small
distances between them. Our theoretical model based on the method of induced
electromotive forces is validated by numerical simulations and measurements. A
good agreement between theory, simulation and measurement proves the veracity
of our approach.
