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On the design model of broadside‐coupled SSS line for microwave integrated circuits
Author(s) -
Kumar Raj
Publication year - 2005
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.20969
Subject(s) - broadside , stripline , microstrip , dielectric , microwave , substrate (aquarium) , materials science , line (geometry) , electronic engineering , electrical engineering , optoelectronics , optics , engineering , mathematics , physics , geometry , telecommunications , oceanography , geology
Abstract A practical design model for the analysis of broadside‐coupled suspended‐substrate stripline is presented. The modified design expression of the shielded microstrip line is valid for a wide range of structural parameters and dielectric constants, that is, 1.0 ≤ ε r ≤ 140.0 for dielectric constant, 0.1 ≤ w/h ≤ 10.0 for strip width with an accuracy of <0.5%. This design expression is further extended for broadside‐coupled suspended‐substrate stripline. The proposed broadside‐coupled suspended‐substrate stripline (BCSSS) expressions are valid over a practical range of structural parameters and dielectric constants. The validity range of this expression for structural parameters is 1.0 ≤ ε r ≤ 16.0 for dielectric constant, 0.1 ≤ w/b ≤ 2.0 for strip width, and s/b ≤ 0.5 for substrate thickness. The average accuracy of the present expressions is <0.6% and <0.2% for the even‐ and odd‐mode effective dielectric constants, respectively, with maximum deviation less than 1.16% with respect to reference value. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 46: 292–297, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20969