Abstract: The invention can be used for telecommunications, measuring and other devices in order to produce stable superhigh frequency signals. An IMPATT diode (4) operating in the cascade break-down mode and having a sharp nonlinearity transforms an input signal in such a way that ultraharmonics which multiple in respect to the frequency of an input signal ?0 occur in a frequency spectrum. An output stage of a multiplier is used in order to separate an output n?0 frequency and to suppress adjacent frequencies. In order to tune the output stage to the n?0 frequency, a tuning plug (8) and short-circuiting pistons (13) are used. The tuning plug (8) is arranged above an upper electrod of the IMPATT diode (4) (inside the axis of the diode). The tuning plugs (13) make it possible to tune resonance capacitance to the n?0 frequency and remove energy towards the output part of a T-bend in which a wave guide pass-band filter (15) is disposed.

Abstract: The invention can be used for telecommunications, measuring and other devices in order to produce stable superhigh frequency signals. An IMPATT diode (4) operating in the cascade break-down mode and having a sharp nonlinearity transforms an input signal in such a way that ultraharmonics which multiple in respect to the frequency of an input signal ?0 occur in a frequency spectrum. An output stage of a multiplier is used in order to separate an output n?0 frequency and to suppress adjacent frequencies. In order to tune the output stage to the n?0 frequency, a tuning plug (8) and short-circuiting pistons (13) are used. The tuning plug (8) is arranged above an upper electrod of the IMPATT diode (4) (inside the axis of the diode). The tuning plugs (13) make it possible to tune resonance capacitance to the n?0 frequency and remove energy towards the output part of a T-bend in which a wave guide pass-band filter (15) is disposed.