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Journal of Microwaves, Optoelectronics and Electromagnetic Applications

versão On-line ISSN 2179-1074

Resumo

LIU, Li; ZHANG, Chengguang; LIU, Yu  e  HUA, Yujin. A High Gain and Directivity Bow Tie Antenna Based on Single-Negative Metamaterial. J. Microw. Optoelectron. Electromagn. Appl. [online]. 2018, vol.17, n.2, pp.246-259. ISSN 2179-1074.  http://dx.doi.org/10.1590/2179-10742018v17i21116.

This paper presents an antenna loaded with metamaterial to enhance its gain and directivity to improve the performance of a ground-penetrating radar system (GPR). We adjusted the parameters of the antenna to change its equivalent capacitance and inductance and applied an operating frequency of 0.5 GHz-1.2 GHz to create an ultra-wideband antenna. On the basis of this operating frequency, we also designed the corresponding negative permittivity and permeability materials to simulate a patch antenna and material in a 1 GHz frequency band. The high gain and directivity of the antenna loaded with single-negative material were verified by simulation. Compared to the original antenna, the maximum gain increased by 7 dB and its directivity was greatly improved.

Palavras-chave : Metamaterial-based antenna; negative permittivity; negative permeability; gain enhancement.

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