Distorted Circular Shaped Scalar Impedance Modulated Circularly Polarized Holographic Metasurface Antenna

A Homogeneous meta unit-cell loaded highly directive Scalar Surface Impedance Modulated (SSIM) Holographic Metasurface (HMS) based distorted circular shaped Leaky-wave antenna (LWA) is proposed in this work. Quarter wavelength monopole fed proposed surface gives a highly directive circularly polarized beamforming along θ =ϕ=O° with a peak gain of
$G_{max}=24.25$
dBi at
$f_{r}=13.25$
GHz. Progressively phase shifted proposed holographic metasurface based leaky-wave antenna (HMSLWA) gives a highly circular polarization (CP) effect at
$f_{r}={16.02}$
GHz towards desired beamforming. A half-power beam width (HPBW) and sidelobe level (SLL) of 7.49° & 18.64 dB is reported.