FINITE-ELEMENT ANALYSIS OF INDUCTIVE STRIPS IN UNILATERAL FINLINES

A three-dimensional finite element method is used in conjunction with the boundary-marching algorithm to characterize inductive strips in un ilateral finlines. For an idealized finline of zero fin thickness, wit hout mounting groove effect, the results agree with those obtained by the hybrid-mode spectral-domain approach to within a few percent with only 98 elements. Field distributions for the dominant propagation mod e in unilateral finlines are generated with the boundary-marching algo rithm. The effect of metalization thickness, the influence of the moun ting groove, and the effect of substrate bending on the discontinuity parameters are studied in detail.