ELECTRIC LINES OF FORCE OF AN ELECTRICALLY SMALL DIPOLE-LOOP ANTENNA-ARRAY

The electric Lines of force of an electrically small dipole-loop anten na array have been determined analytically for both the near- and far- fields of the array. It has been found that the behavior of the famili es of electric contours are dependent upon a coupling parameter, which is the ratio of the loop and dipole sizes and currents. This paramete r also controls the appearance (or not) and position of the points of equilibrium for the radiated field when analyzed in a real phase plane . The electric lines of force of the dipole-loop array exhibit increas ed directivity in the plane of the array when the coupling parameter i s purely real, indicating that the respective dipole and loop currents must be in phase quadrature for this effect to occur.