Nonuniformities in laminated transmission lines

The effect on transmission properties of certain nonuniformities in laminated transmission lines has been calculated by a perturbation method. Particular cases hare been calculated, including the effect of varying radius of curvature in a cylindrical Clogston line, the effect of systematic variation in effective dielectric constant and the effect of random variation in layer thickness where the nonuniformities are known only through statistical properties. In one Clogston line where measurements of nonuniformity have been made the method predicts a transmission impairment in substantial agreement with observations.