Generalized small signal impedance for microwave BARITT diodes

A general treatment is outlined and equations are developed for the small signal impedance of microwave teach-through BARITT diodes. The results are expressed in terms of "injection phase delay," φ
i
and "drift transit," θ
d
angles. It is shown that substantial improvements in the negative resistance and hence efficiency of such oscillators can be expected as φ
i
is allowed to increase, but not to exceed π/2.