Correction to "Theory of an Efficient Electronic Phase Shifter Employing a Multilayer Dielectric-Waveguide Structure" (Letters)

A factor of n/sub g/ should appear in the numerator of the right side of (11). This error affects the design of the structure in Fig. 3, as follows: To obtain values of Delta phi/Delta iota of the order 50-80/spl deg//cm, it is necessary that d/sub g//lambda/sub 0/ be raised to 0.4375, and an additional layer of refractive index 3.4 and thickness 0.4375 lambda/sub 0/ be placed between the active layer and the superstrata. Other indices and thicknesses remain unchanged.