In this work, a wideband compact and low-profile metamaterial-based antenna has been developed. The antenna bandwidth is improved by employing square ring-shaped defect in the ground plane. The circularly polarized (CP) antenna has been realized by two pairs of radiators and CP characteristics has been obtained by placing two radiators for X-polarized wave and two radiators for Y-polarized wave. Each radiator is designed with epsilon negative transmission line (ENG-TL) to generate zeroth order resonance (ZOR). Simulated results show that the antenna achieves a gain of 4.98 dBiC, which is improved by 0.62 dBiC compared to the structure without square ring-shaped defected ground structure. Also, the operating bandwidth of our proposed antenna improves to 698.6 MHz.
In this work, a novel wideband compact and low-profile metamaterial-based antenna has been proposed. The introduction of metasurface layer between the patch and ground plane improves antenna's performance, considerably. Our proposed circularly polarized (CP) antenna has been realized by two pairs of radiators. The CP characteristics have been obtained by placing two radiators in X-polarized wave and two in Y-polarized wave. Each radiator is carefully designed with epsilon negative transmission line (ENG-TL) to generate zeroth-order resonance (ZOR). Our proposed antenna achieves a gain of 4.94 dBiC, which is almost 0.58 dBiC higher than the structure without metasurface. Also, the operating bandwidth and the simulated axial ratio bandwidth (ARBW) of our proposed antenna improves to 676.3 MHz and 474.1 MHz.
In this work, a novel wideband compact and low-profile metamaterial-based antenna has been proposed. The introduction of metasurface layer between the patch and ground plane improves antenna's performance, considerably. Our proposed circularly polarized (CP) antenna has been realized by two pairs of radiators. The CP characteristics have been obtained by placing two radiators in X-polarized wave and two in Y-polarized wave. Each radiator is carefully designed with epsilon negative transmission line (ENG-TL) to generate zeroth-order resonance (ZOR). Our proposed antenna achieves a gain of 4.94 dBiC, which is almost 0.58 dBiC higher than the structure without metasurface. Also, the operating bandwidth and the simulated axial ratio bandwidth (ARBW) of our proposed antenna improves to 676.3 MHz and 474.1 MHz.
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