DocumentCode :
1235269
Title :
Analytically and accurately determined quasi-static parameters of coupled microstrip lines
Author :
Wan, Changhua
Author_Institution :
Dept. of Electromagn. & Circuit Theory, Univ. Politecnica de Madrid, Spain
Volume :
44
Issue :
1
fYear :
1996
fDate :
1/1/1996 12:00:00 AM
Firstpage :
75
Lastpage :
80
Abstract :
Using modified conformal mapping technique and magnetic-wall approximation, closed-form expressions for quasi-static parameters of coupled microstrip lines are determined accurately in this paper. They are found to be very accurate when compared with the well-recognized numerical solutions in the literature. Specifically, the present effective permittivities for both modes are accurate to within 0.4%, the even-mode characteristic impedance is accurate to within 1.2%, and the odd-mode impedance is accurate to within 1.8% for w/h⩾0.4 and 3.8% for 0.4>w/h⩾0.1. They are believed to be the most accurate closed-form formulas for coupled microstrip lines and should find applications in microstrip computer-aided design. In addition, two sets of existing equations have been checked against exact values or accurate results. According to the comparisons, they are either unacceptable or partially acceptable. Three data tables instead of figures are given for clarity
Keywords :
circuit CAD; microstrip lines; microwave circuits; permittivity; closed-form expressions; computer-aided design; coupled microstrip lines; effective permittivities; even-mode characteristic impedance; magnetic-wall approximation; modified conformal mapping technique; odd-mode impedance; quasi-static parameters; Application software; Closed-form solution; Conformal mapping; Couplings; Design automation; Equations; Impedance; Magnetic analysis; Microstrip; Permittivity;
fLanguage :
English
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9480
Type :
jour
DOI :
10.1109/22.481387
Filename :
481387
Link To Document :
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