Design of the artificial magnetic conductors with meander line elements: reduction in the first and second resonant frequencies

作者：Ramos Welyson T S^*; Mesquita Renato C; Silva Elson J

来源：Materials Research Express, 2017, 4(7): 075801.

DOI：10.1088/2053-1591/aa7a7e

• artificial magnetic conductor
• effective length
• high impedance surface
• meander line
• metasurface
• perfect magnetic conductor
• multiband operation

A novel design for a planar artificial magnetic conductor (AMC) with meander line element is used to achieve miniaturization, reduction in the second/ first resonant frequency ratio, and multi-band operation. It is known that various parameters-such as geometry, dielectric substrate thickness, the gap between patches, the length and width of a patch, the size of unit cell, permittivity, and permeability-strongly affect the resonant frequency. To obtain a miniaturized AMC, in this paper, we investigate the role of the metallic patch effective length on resonant frequency. Meander-shape is used to change the effective length in the direction of the incident wave polarization. A discussion of the design parameters and the electric field distribution is presented. Six different configurations are proposed. Miniaturization and reduction in the first/ second resonant frequency ratio is achieved. In addition, the meander-shape allows the appearance of different operating bands that depend on the number of meanders. For instance, four bands are observed for one meander (U-shape). Therefore, a simple way to obtain AMC miniaturization and multi-band devices is proposed. The results are obtained by the finite element method. To validate our design some results have been compared against experimental testing presented in literature.

• 出版日期2017-7