Fauzan Al Haqqi, Yohandri
This paper describes the design of broadband circularly polarized microstrip antenna with a leaf-shaped metasurface with the high performance for x-band applications. The antenna has a structure of two substrate layers. A square shape radiating with truncated corners and a slot in the bottom layer. In addition, the top layer has a leaf-shaped metasurface. The truncated corners and slots produced the impedance and axial ratio bandwidths. To improve performance further, additional resonance and CP radiations are achieved for broadband operation in terms of impedance and axial ratio through effective excitation of surface waves propagating alone on the leaf-shaped metasurfaces. The stacking of metasurface on the modified patch with no air gap resulted in a compact size. The simulated impedance bandwidth is 2.47 (8.28 GHz - 10.75 GHz) for |S11| ≤ −10. The 3-dB axial ratio bandwidth is 1.30 GHz (8.76 GHz–10.06 GHz). Meanwhile, the simulation yields 9.08 dBi at 9.4 GHz. The antenna design may be suitable for x-band applications based on simulation results. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2026.
Department of Physics, Faculty of Mathematics and Natural Science, Universitas Negeri, Padang, Indonesia
