Abstract :
An aerial system is described which is capable, without readjustment, of selecting one or other, of two circularly polarized waves of opposite sense over a frequency range of 2¿6 Mc/s when they are incident vertically upon the system. Two horizontal dipoles are used at right angles and are associated with two corresponding inductance-capacitance lattice networks. E.M.F.´S in the aerials, which are initially 90° out of phase, may be added in phase, thus giving selection of a circularly polarized component. A discrimination ratio between the components of at least 12:1 has been obtained for frequencies from 2 to 6 Mc/s.
