Compact Metasurface Loaded Antenna with Improved Axial Ratio Beamwidth for Airborne Applications at 2.2 GHz

The proposed work explains a compact epsilon-negative (ENG) transmission line (TL) radiator antenna combined with metasurface (MS) reflector applicable for airborne applications at 2.2 GHz. The radiator antenna supports circular polarization radiation due to the combination of third-iterative fractal (TIF) and ENG-TL. The final MS reflector loaded antenna provides a smaller dimension of 0.46λ
0
× 0.46λ
0
× 0.011λ
0
at 2.2 GHz. The antenna offers an acceptable impedance bandwidth (IBW) of (2.16-2.253 GHz) 4.22%, improved gain of 6.33 dBic, higher gain-to-area (G/A) ratio of 19.9 dB, extended axial ratio beamwidth of 100° and gain more than 2.04 dBic for θ = ±500° and ϕ = 0° to 360° at 2.23 GHz. Hence the presented MS reflector loaded antenna is suitable for airborne applications.