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PIER PIER B PIER C PIER M PIER Letters
2009-09-26
Characterization of the Validity Region of the Extended T-Matrix Method for Scattering from Dielectric Cylinders with Finite Length
By
Wen-Zhe Yan,

    Dr. Wen-Zhe Yan

    Zhejiang University

    China

    Homepage

Yang Du,

    Professor Yang Du

    Zhejiang University

    China

    Homepage

Zengyuan Li,

    Dr. Zengyuan Li

    Institute of Forest Resources Information Techniques, Chinese Academy of Forestry

    China

    Homepage

Er-Xue Chen,

    Dr. Er-Xue Chen

    Institute of Forest Resources Information Techniques, Chinese Academy of Forestry

    China

    Homepage

Jian-Cheng Shi

    Prof. Jian-Cheng Shi

    Instute for Computational Earth System Sciences

    University of California

    USA

    Homepage

Progress In Electromagnetics Research, Vol. 96, 309-328, 2009
doi:10.2528/PIER09083101
Abstract
The T-matrix approach is effective in analyzing electromagnetic scattering from finite scatterers. Yet for scatterers with extreme geometry, this approach may fail. One example is its inability to analyze scattering from dielectric cylinders with large aspect ratios. To deal with such difficulty, recently we proposed a method based on an extension of the T-matrix approach, where a long cylinder is hypothetically divided into a cluster of identical sub-cylinders, for each the T matrix can be numerically stably calculated. Special care was paid to fulfill the boundary conditions at the hypothetic surface of any two neighboring sub-cylinders. The resultant coupled equations are different from that of multi-scatterer theory. The model results were in good agreement with experiment data available in the literature. However, the validity region of the proposed method was not fully characterized. Now we have developed and validated a method of moment (MoM) code, and are in a position to carry on the task of characterizing the validity region. The proposed method is found to be applicable to dielectric cylinders of arbitrary length as long as the T matrix is attainable for the elementary sub-cylinder. The conditions for the T matrix to be numerically stably calculated in terms of the equivalent volumetric radius and relative dielectric constant are also empirically obtained.
Citation
Wen-Zhe Yan, Yang Du, Zengyuan Li, Er-Xue Chen, and Jian-Cheng Shi, "Characterization of the Validity Region of the Extended T-Matrix Method for Scattering from Dielectric Cylinders with Finite Length," Progress In Electromagnetics Research, Vol. 96, 309-328, 2009.
doi:10.2528/PIER09083101
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