SENSITIVITY OF SINGLY AND DOUBLY TERMINATED PROTOTYPE CIRCUITS

It is well known that a doubly terminated lossless ladder network has zero sensitivity to each element at every frequency of maximum power t ransfer. The author shows that a singly terminated ladder network, wit h the same frequency response as a doubly terminated ladder network, h as the same points of zero sensitivity to simultaneous changes in the values of the elements of the same type by an equal relative amount. T his result has been extended to cover FDNR-based filters.