Integral Equation Modeling of Doubly Periodic Structures With an Efficient PMCHWT Formulation

被引:6
|
作者
Nosal, Samuel [1 ]
Soudais, Paul [2 ]
Greffet, Jean-Jacques [1 ]
机构
[1] Ecole Cent Paris, Lab EM2C, Chatenay Malabry, France
[2] Dassault Aviat, F-92210 St Cloud, France
关键词
Boundary integral equations (BIE); frequency selective surfaces (FSS); hybrid method; metamaterials; method of moments (MoM); periodic Green's function; FREQUENCY-SELECTIVE SURFACES; BOUNDARY-CONDITION; SCATTERING; MOMENTS; ARRAY;
D O I
10.1109/TAP.2011.2167898
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
A surface integral equation modeling is described for complex doubly periodic structures. To avoid long computations of the slowly convergent pseudoperiodic Green's function, fictitious surfaces between translated unit cells are set in order to bound regions of the structure within the symmetry cell and use the free-space Green's function. The integral operators on top and bottom surfaces are computed with an algorithm originally used for planar frequency-selective surfaces. This approach uses a unique periodic PMCHWT formulation in all the regions, with two different kinds of Green's function. The method and its advantages are illustrated by two cases in the near-IR domain and in the radar domain. A frequency selective structure is studied, that shows a large flat-top bandwidth under oblique incidence and TM polarization.
引用
收藏
页码:292 / 300
页数:9
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