A new theory of receiving antennas

We have made a thorough examination of the existing theory of receiving antennas, particularly its equivalent circuit and we have formulated a new theory. The formulation is based on the classical theory of scattering, and by revising the well-known circuit relations for coupled antennas formulated by P.S. Carter (see Proc. IRE, vol.20, p.1004-41, 1932). The new theory enables us to revise not only the equivalent circuit but many related parameters, such as the impedance matching factor, the polarization matching factor, the receiving cross-section, and the generalized Friis´s transmission formula.