Circuit Model of Multilayer Microstrip Step Discontinuity Using Single-Layer Reduction Formulation

Authors: Verma, A. K.; Singh, Himanshu; Awasthi, Y. K.

Source: Electromagnetics, Volume 29, Number 6, August 2009 , pp. 483-498(16)

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Abstract:

New closed-form models for the microstrip step discontinuity to compute shunt capacitance (Cp) and series inductance (Ls) is reported for the substrate 2.3 ≤ εr ≤ 40.0 or more. The model is extended to the multilayer (composite and suspended substrate) microstrip step discontinuity. The average deviation for normalized Cp is 5%, and normalized Ls are 2.9 against the results extracted from Sonnet. For the multilayer step discontinuity, the average deviation in the present model for Cp is 5.2%. The method of moment analysis gives an average deviation of 13.53% for Cp and 5.3% for Ls against the results of Sonnet. Comparison with Sonnet indicates that the static model for simple and multilayer case is valid for h/λ ≤ 0.42.

Keywords: microstrip step; step discontinuity; equivalent circuit model; closed-form model

Document Type: Research article

DOI: http://dx.doi.org/10.1080/02726340903098555

Affiliations: 1: Microwave Research Laboratory, Department of Electronic Science, University of Delhi, South Campus, New Delhi, India

Publication date: 2009-08-01

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