INTERDIGITAL MICROSTRIP CIRCUIT PARAMETERS USING EMPIRICAL FORMULAS AND SIMPLIFIED MODEL

Empirical formulas are given for single- and multiple-coupled microstrips, directly giving propagation mode admittances and phase velocIties to be used in simplified expressions for the admittance parameters for the 2N-port network in the form of N-coupled strips, thus forming the basis for both analysis and synthesis of interdigital microstrip circuits. Calculated and measured results are presented for two Interdigital bandpass filters synthesized as Chebyshev filters. Copyright © 1979 by The Institute of Electrical and Electronics Engineers, Inc.