Polarization Diversified Multi Beam Holographic Metasurface Antenna for Ku band Applications

A polarization diversified, multibeam holographic metasurface (HMS) antenna is proposed in this work. Subwavelength scalar metallic patches are non-homogeneously placed on grounded dielectric substrate.8 Based on microwave holography and leaky-wave excitation theory, proposed surfaces are excited with single or multiple excitations. Both progressive and constant phase is partially incorporated into overall impedance profile of proposed HMS to achieve dual polarized (i.e. LP and CP) dual beam (i.e.(θ, φ)={(-30°, 0°);(30°, 0°)}) radiation. Along with full structured (i.e. dimension=15.5λ0 ×15.5λ0) HMS, a half structured HMS is also designed to remove the center null effect of LP beam at (θ, φ)=(- 30°,0°). A maximum gain of ≈22.36dBi and 19.46dBi is reported for proposed CP and LP beam of full structured HMS. Nearly 3dB gain suppression is observed at each beam-position for half structured HMS. Simulated S11(dB), 2D & 3D gain pattern with axial ratio plots for both half and full structured HMS is presented.