A CAD-oriented analytical model for the losses of general asymmetric coplanar lines in hybrid and monolithic MICs

Author

Ghione, Giovanni

Author_Institution

Dipartimento di Elettronica, Politecnico di Torino, Italy

Volume

41

Issue

9

fYear

1993

fDate

9/1/1993 12:00:00 AM

Firstpage

1499

Lastpage

1510

Abstract

New analytical approximations are derived for the conductor losses of asymmetric coplanar waveguides (ACPW) and coplanar striplines (ACPS) on a finite-thickness dielectric substrate. The expressions hold for lines whose metallizations have thickness much smaller than the slot and strip widths, but suitably larger than the skin penetration depth at the operating frequency. The derivation is based on an extension of the conformal mapping approach formerly proposed by Owyang and Wu (1958) for symmetric lines in air. Comparisons with published data from quasistatic or full-wave numerical analyses are presented to validate the expressions derived for both the symmetric and the asymmetric case. The analytical characterization presented in the paper is well suited for inclusion into CAD codes for MMIC design

Keywords

MMIC; circuit CAD; hybrid integrated circuits; losses; microstrip components; microwave integrated circuits; strip line components; waveguide theory; CAD codes; CAD-oriented analytical model; MMIC design; analytical approximations; asymmetric CPW; asymmetric coplanar lines; conductor losses; conformal mapping; coplanar striplines; finite-thickness dielectric substrate; hybrid MIC; metallization; monolithic MICs; skin penetration depth; Analytical models; Conductors; Coplanar waveguides; Dielectric losses; Dielectric substrates; Frequency; Metallization; Skin; Stripline; Strips;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.245668

Filename

245668