Validity and Accuracy of Equivalent Circuit Models of Passive Inductive Meshes. Definition of a Novel Model for 2D Grids |
| |
| Authors: | R Sauleau Ph Coquet and J-P Daniel |
| |
| Institution: | (1) Laboratoire Antennes Radar Télécommunications, Equipe Antennes et Technologie, FRE CNRS 2272, Avenue du Général Leclerc, Université de Rennes 1, 35042 Rennes Cedex, France;(2) Ecole Normale Supérieure de Cachan—Antenne de Bretagne, Campus de Ker Lann, 35170 Bruz, France;(3) Antennes Process, 5, rue nationale, 35235 Thorigné-Fouillard, France |
| |
| Abstract: | Accuracy of equivalent circuit models of periodic grids is investigated in amplitude and phase in the visible region. The grids studied here are one-dimensional (1D) and two-dimensional (2D) inductive thin metal meshes. They are located in free space and are illuminated by a plane wave under normal incidence. The range of validity and the accuracy of conventional circuit models are defined by comparison with rigorous results obtained with the Finite-Difference Time-Domain (FDTD) method. In particular, it is shown that electrical models of 1D grids are accurate, whereas equivalent circuits of 2D grids should be used very cautiously. Then, a new formulation is proposed to overcome this major drawback. In the non-diffraction region, the agreement between our model and the FDTD results is within 2% for the power reflectivity and 1° for the phase over a very wide range of strip widths. |
| |
| Keywords: | periodic surfaces inductive 1D and 2D metal grids FDTD equivalent circuit models |
| 本文献已被 SpringerLink 等数据库收录！ |
|
