Scattering-matrix theory of dispersive interdigital transducers for pulse-compression radar

By an extension of previously developed theory, expressions are obtained for the response of a dispersive transducer to an input signal. Assuming that suitable weighting is applied to eliminate side lobes due to the finite length of the transducer, there remain in the output of a delay line side lobes due to the triple-transit signal, to defective fingers in the transducers, and to multiple-finger interactions. Approxmate analytic expressions are obtained for the magnitudes of these side lobes, and it is explained how the quantities in these expressions can be obtained from measurements of the c.w. insertion loss and triple-transit level.