Integrated Circulator Design for Parametric Amplifier Application

A paper accepted for presentation at the 1964 International Solid State Circuits Conference describes a two-stage, L-band parametric amplifier with a gain of 19 /spl plusmn/ 0.25 db over a 20% band, and a 1.5 db noise figure in the 15% band of interest. The achievement of maximum performance in a parametric amplifier of this type depends critically upon the characteristics of the associated circulators. It is felt that a discussion of the techniques used in the design of the circulator package for this amplifier might prove helpful to other designers in the field.