Characteristics of a generalized fin-line for millimeter wave integrated circuits

Generalized fin-lines are analyzed which consist of slots located on more than one interface between dielectric layers inserted in parallel with the E-plane of a waveguide. The analysis is based on a simplified formulation technique based on the spectral domain immittance matrix followed by a Galerkin's method. It allows as many slots as one desires at each interface, and the locations and the widths of these slots are arbitrary. The numerical process to carry out the present analysis is rather efficient. Some numerical data, including propagation constants of the propagating modes as well as characteristic impedances are presented for several structures considered useful for millimeter-wave circuit applications.This work was in part supported by US Army Research Grant DAAG 29-78-G-0145. The major part of this work was presented at 1980 Int. URSI EMT Symposium, Munich.