The application of the method of moments to the analysis of electrically-small “compound” antennas

Electrically-small “compound” antennas each consisting of a “collocated” electric dipole and magnetic dipole are investigated. Two configurations corresponding to two different orientations are considered: (1) with the dipole moments aligned and (2) with the dipole moments orthogonal. The second configuration is purported to fall into a class of antennas to which traditional theories on radiation and limitations do not apply. Numerical analyses based on the method of moments are performed for both configurations. The accuracy of the moment method in the analysis of electrically-small antennas is discussed in detail with focus on convergence. The results of the numerical modeling effort are examined and some conclusions concerning the operation of such a configuration are drawn