Implementation of S-Parameter of Active Elements for FDTD Analysis

Naobumi MICHISHITA
Takashi HIBINO
Hiroyuki ARAI

Publication
IEICE TRANSACTIONS on Electronics   Vol.E89-C    No.12    pp.1843-1850
Publication Date: 2006/12/01
Online ISSN: 1745-1353
DOI: 10.1093/ietele/e89-c.12.1843
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Emerging Microwave Techniques)
Category: Passive Circuits/Components
Keyword: 
FDTD,  S-parameter,  active element,  implementation method,  tunable band pass filter,  

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Summary: 
In the design of an active integrated antenna, it is necessary to analyze problems such as unwanted emissions or mutual coupling between elements. In this paper, we clarify the problems in implementing S-parameters for an FDTD analysis. Cubic spline interpolation is suitable for the construction of the S-parameter data. The implementation methods of terminal resistors and vias are examined. The proposed FDTD analysis becomes stable after correcting the discrete time lag in the formation of the incident wave. The validity of the proposed method is verified in its application to the low pass filter and the frequency tunable band pass filter.