On the Bandwidth of High-Impedance Frequency Selective Surfaces

被引:111
作者
Costa, Filippo [1 ]
Genovesi, Simone [1 ]
Monorchio, Agostino [1 ]
机构
[1] Univ Pisa, Dept Informat Engn, I-56122 Pisa, Italy
来源
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS | 2009年 / 8卷
关键词
Artificial magnetic conductor (AMC); bandwidth of high-impedance surfaces (HISs); GROUND PLANE; ANTENNAS;
D O I
10.1109/LAWP.2009.2038346
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
In this letter, the bandwidth of high-impedance surfaces (HISs) is discussed by an equivalent circuit approach. Even if these surfaces have been employed for almost 10 years, it is sometimes unclear how to choose the shape of the frequency selective surface (FSS) on the top of the grounded slab in order to achieve the largest possible bandwidth. Here, we will show that the conventional approach describing the HIS as a parallel connection between the inductance given by the grounded dielectric substrate and the capacitance of the FSS may induce inaccurate results in the determination of the operating bandwidth of the structure. Indeed, in order to derive a more complete model and to provide a more accurate estimate of the operating bandwidth, it is also necessary to introduce the series inductance of the FSS. We will present the explicit expression for defining the bandwidth of a HIS, and we will show that the reduction of the FSS inductance results in the best choice for achieving wide operating bandwidth in correspondence with a given frequency.
引用
收藏
页码:1341 / 1344
页数:4
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