Frequency doublers using charge-storage/step-recovery diodes

Computed results are given for the efficiency and power output of a p-n junction-diode frequency doubler operating in the charge-storage/step-recovery mode. These results are compared to those obtained with the same diode used as a nominally or overdriven varactor, and the limitations and advantages of the storage/recovery mode are discussed. It is shown that for moderate efficiencies, e.g. ¿3dB, the storage/recovery mode gives the best power output. For high efficiencies (better than ¿1dB), this mode can give excellent results if the forward-bias (contact) resistance is less than the reverse-bias series resistance. The results are verified with a high-frequency stripline doubler.