Passive Element Approximation of Equivalent Circuits by the Impedance Expansion Method

Nozomi HAGA  Masaharu TAKAHASHI  

Publication
IEICE TRANSACTIONS on Communications   Vol.E101-B   No.4   pp.1069-1075
Publication Date: 2018/04/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2017EBP3246
Type of Manuscript: PAPER
Category: Antennas and Propagation
Keyword: 
equivalent-circuit modeling,  method of moments,  impedance expansion method,  

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Summary: 
The impedance expansion method (IEM), which was previously proposed by the authors, is a circuit-modeling technique for electrically-very-small devices. The equivalent circuits derived by the IEM include dependent voltage sources proportional to the powers of the frequency. However, the previous report did not describe how circuit simulators could realize such dependent voltage sources. This paper shows how this can be achieved by approximating the equivalent circuit using only passive elements.