Oscillator design using S parameters and a predetermined source or load

An approach to microwave oscillator design is given which will solve in closed form the impedances necessary for a device to achieve some optimum condition. For example, maximum power output, minimum noise shelf, or maximum device gain for the amplifying device in the oscillator may be specified. The closed-form solution to the oscillation condition is given under the conditions of a specified impedance presented to either the source or the load port of the amplifying device. This approach is applicable whenever S parameters are available including millimeter wavelengths, and even at optical frequencies with the appropriate S matrix. The example discussed used series terminations