TRANSMISSION OR DELAY LINE TRANSFORMERS

摘要

A transmission or delay line transformer comprising a plurality of transmission or delay lines (101-110) so arranged that the inputs to the lines are connected together in parallel to provide a transformer input (130) and the outputs of the lines are connected together in series so as to provide a transformer output (131). In order to provide isolation between the input (130) and the output (131) of the transformer the lines are arranged so as to provide inductive isolation (L) between the inputs and outputs of the lines. The inductive isolation (L) provided between the input and output of any particular line depends upon the stage of the transformer which that particular line forms, the higher the stage the higher the amount of inductive isolation provided. The transmission or delay lines may take the form of conventional transmission lines, transmission lines modified so as to increase the time of propagation of signals along the line or lumped element balanced delay lines.