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Coupling parameters for capacitatively coupled orthogonal microstrip branch lines
Author(s) -
Huang F.,
Loh C. H.,
Poh C. H.
Publication year - 1998
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/(sici)1099-047x(199809)8:5<367::aid-mmce3>3.0.co;2-9
Subject(s) - microstrip , capacitance , microwave , inductance , resonator , coupling (piping) , method of moments (probability theory) , physics , equivalent circuit , topology (electrical circuits) , electronic engineering , electrical engineering , mathematics , engineering , optoelectronics , voltage , optics , quantum mechanics , mechanical engineering , statistics , electrode , estimator
Capacitance and inductance equivalent circuit parameters for various microstrip discontinuities were reported more than 20 years ago, but those for capacitatively coupled orthogonal microstrip branch lines were not included. These structures are used for ring resonators and in a class of band‐stop filter. The method of moments has been used to find these parameters. A simple basis function for the subareas along the edges of the conductors allows for the charge singularity, giving fair accuracy for a reasonable number of subareas. The series coupling capacitance is 20–40% larger than end‐coupled lines with an equal gap, even for small gaps. © 1998 John Wiley & Sons, Inc. Int J RF and Microwave CAE 8: 367–374, 1998.