Effective Surface Impedance of a Printed-Circuit Tensor Impedance Surface (PCTIS)

被引：88

作者：

Patel, Amit M. ^{[1
]}

Grbic, Anthony ^{[1
]}

机构：

[1] Univ Michigan, Dept Elect Engn & Comp Sci, Radiat Lab, Ann Arbor, MI 48109 USA

来源：

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 2013年 / 61卷 / 04期

基金：

美国国家科学基金会;

关键词：

Anisotropic structures; artificial impedance surfaces; impedance sheets; metasurfaces; periodic structures; surface impedance; surface waves; tensor surfaces; GUIDANCE; WAVES;

D O I：

10.1109/TMTT.2013.2252362

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：

The surface impedance and dispersion equation of a printed-circuit tensor impedance surface (PCTIS) are derived using a modified transverse resonance technique. A PCTIS consists of a subwavelength-patterned metallic cladding over a grounded dielectric substrate. The metallic cladding is analytically modeled as a tensor impedance sheet. An explicit expression is derived for the effective surface impedance of the PCTIS using a transmission-line approach. First, the surface-impedance expression is found for a printed-circuit scalar impedance surface using the transverse resonance technique. Next, a modified transverse resonance technique is applied to an idealized tensor impedance boundary condition (TIBC) to find its dispersion equation. Finally, the analysis of the printed-circuit scalar impedance is combined with that of the idealized TIBC to find the tensor surface impedance and dispersion equation of a PCTIS. A discussion of the principal axes and the propagation of TM and TE waves is provided. The special case of electrically thin PCTISs is also analyzed and discussed.

引用

页码：1403 / 1413

页数：11

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