Dual-band circularly polarized metamaterial radome for antenna gain enhancement

摘要

This paper proposes a dualband metamaterial-radome which can improve the gain of circularly polarized antenna. The refractive index of the metaterial is designed to near zero. This feature can use to focus on the electromagnetic wave and increase the gain of antenna. This dualband metamaterial is placed in front of the antenna 6 mm. The gain of the circularly polarized antenna increases 1.47 dB and 1.05 dB at the 2.4GHz and 5GHz band respectively.