Improved Dipole-Panel for Circular Polarization

In this paper a new dipole-panel for circular polarized TV arrays is presented. The numerical analysis and the experimental tests performed upon this basic source show that it exhibits very good characteristics of axial ratio over a frequency band of the order of ±15%. Perhaps the most important feature of the dipole-panel is its high degree of componibility when it is used as a unit building-block in the synthesis of TV antenna arrays: smooth circular horizontal patterns have been realized with four-, five-and six-face arrays. Moreover, the possibility of synthesizing patterns different from the omnidirectional one, such as the cardioid pattern and the kidney pattern, shows that this dipole-panel is able to cover a very wide range af practical pattern shapes. To illustrate these features, a collection of numerical and experimental data are presented.