Combination of leaky and CPW modes for leaky lens antennas with dual polarization

This work presents for the first time a dual polarized leaky lens antenna. The non dispersive performances of linearly polarized leaky lenses are maintained while doubling their aperture efficiency. In fact two orthogonal incoming polarizations can be received with same phase center, while the leaky lens retains the lowest cross polarization levels reported for UWB antennas. The achievement of these goals is obtained despite the complete planarity of the feeding structure. Twin slot lines are used as both transmission and leaky lines, by exploiting the coexistence of both common and differential modes. The design has then been validated by means of full wave simulations. Future applications will include radiometric or spectroscopic scenarios in which accurate polarization discrimination is required.