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An accurate dispersion expression for shielded microstrip lines

✍ Scribed by Wells, Garnet ;Pramanick, Protap

Publisher
John Wiley and Sons
Year
1995
Tongue
English
Weight
432 KB
Volume
5
Category
Article
ISSN
1050-1827

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✦ Synopsis

Abstract

A closed‐form dispersion expression for shielded microstrip lines is presented here for the first time. The expression is valid for a wide range of frequencies, geometrical parameters, and substrate dielectric constants. Unlike previous expressions for open microstrip lines, the inflection frequency of the dispersion curve has been chosen to be a quadratic function of the frequency at which the quasi‐TEM mode of the microstrip couples strongly with the lowest order transverse electric mode of the equivalent parallel plate waveguide of the microstrip. Because this expression is accurate with respect to numerical techniques, it will be useful in time and frequency domain analyses of various shielded microstrip discontinuities, components, resonators, and VLSI packagings. Dispersion in open microstrip can be treated as a special case of this expression. © 1995 John Wiley & Sons, Inc.

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