Large-signal varactor harmonic generator equivalent circuits

This paper presents a development of equivalent circuits for large-signal varactor harmonic generators, doublers through sextuplers inclusive, employing abrupt-junction varactor diodes. Using the results of the development a 2^m(m = 1,2,3,....) multiplier equivalent circuit is obtained. The equivalent circuits that are developed take into account the circuit and varactor losses. The development is presented in a manner that will enable the reader to very easily expand this paper and obtain equivalent circuits for higher order multipliers. The equivalent circuits can be used as an effective design tool as well as an aid for obtaining an insight into the mechanism of harmonic generation.