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A ThreeDimensional Analysis for Symmetrical TEM Cells by the Mixed Boundary Element Method Based on Both of Constant and Linear Elements
Yasuhiro TANAKA Toshihisa HONMA Ikuo KAJI
Publication
IEICE TRANSACTIONS (19761990)
Vol.E67
No.9
pp.474479 Publication Date: 1984/09/25 Online ISSN:
DOI: Print ISSN: 00000000 Type of Manuscript: PAPER Category: Instrumentation Keyword:
Full Text: PDF(357.6KB)>>
Summary:
A series of transverse electromagnetic transmission cells (TEM cells) developed at the National Bureau of Standards (NBS) is threedimensional analyzed using a mixed discretization based on both of constant and linear elements in a boundary element method (mixed BEM). Mixed BEM presented here is generalized in order to be usable in two and three dimensions. Conductor surface of TEM cell models is discretized using nonuniform elements so that the flux distribution can be approximated more accurately in the less number of elements. The distributed characteristic impedance, which is important to design the cell, in the main line section is evaluated through the flux induced in the center conductor. The calculated results are in good agreement with those in two dimensions in spite of the small number of elements. As a result, it is proved that threedimensional cell models are effectively and accurately solved by using mixed BEM and nonuniform elements together. The present work plays a preliminary part in an analysis of more realistic NBS cell models taken into account a tapered section. In future, therefore, we will be able perform a reliable analysis of TEM cells using mixed BEM and nonuniform elements.

