Low-loss single balanced modulators utilising minority-carrier storage

It is shown that the minority-carrier-storage phenomenon may be utilised to achieve a variation in the mark/space ratio of the switching function in rectifier modulators. In a number of such modulators this variation results in a decrease of conversion loss, and these circuits are examined in detail. Differences in performance with square-wave and sine-wave carriers are considered, and the performance of a practical double-tuned modulator using OA200 diodes is reported.