Calculation of Coupling between a Monopole Antenna and a Strip Line in a Shield Case for a Portable Telephone

Toru FUKASAWA  Chiharu MIYAZAKI  Shigeru MAKINO  Shuji URASAKI  

Publication
IEICE TRANSACTIONS on Communications   Vol.E83-B   No.3   pp.505-510
Publication Date: 2000/03/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Recent Progress in Electromagnetic Compatibility Technology)
Category: EMC Evaluation
Keyword: 
shield case,  strip line,  antenna,  

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Summary: 
This paper shows quantitative evaluation of coupling between a monopole antenna outside a shield case and a strip line inside that for a portable telephone. The amount of the coupling is calculated using FDTD method together width EMF method. This combination of methods can raise the calculation efficiency. Dependence of the coupling on the length of gaps, the height of the strip line and the length of the antenna is clarified. The correspondence between calculated and measured results shows the validity of the calculation.