High Gain Arbitrarily-Oriented Linearly-Polarized Leaky-Wave Antenna by Tensorial Impedance Surfaces

A high gain linearly polarized leaky-wave holographic antenna is proposed for arbitrary polarization across the visible region. Accordingly, an analytical method is presented based on the Fourier optics for the design of leaky-wave holograms. Therefore, the magnitude, polarization and beam direction of the aperture field can be arbitrarily synthesized. Its advantage is the accurate realization of the far-zone field pattern without the use of full-wave analysis which significantly reduces the synthesis CPU time consumption. Asymmetric rectangular patches are used for the synthesis of the hologram. Two parameters of the rectangle geometry, namely its width and rotation angle, are considered for the realization of different surface impedances. The final structure has the gain and co- to cross-pol ratio better than 25.6 dB and 16.6 dB, respectively and its total efficiency at the design frequency is achieved greater than 90%