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On determining the characteristic impedance of low‐loss transmission lines
Author(s) -
Post John E.
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.21117
Subject(s) - transmission line , classification of discontinuities , characteristic impedance , electrical impedance , microwave , microstrip , electric power transmission , transmission (telecommunications) , line (geometry) , electronic engineering , quarter wave impedance transformer , engineering , electrical engineering , input impedance , physics , acoustics , computational physics , telecommunications , mathematical analysis , mathematics , damping factor , geometry
Characteristic‐impedance ( Z 0 ) determination of low‐loss transmission lines is very sensitive to electrical discontinuities at the end of the transmission‐line test structure. A method is shown that improves the accuracy of characteristic‐impedance determination by removing the effect of inductive discontinuities due to transmission‐line width variations. In the case of microstrip line, the measurement results agree to within 5% of the theoretical predictions from Wheeler's equation. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 47: 176–180, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21117