摘要：

Theoretical and experimental investigations on a solid-state millimeter wave source are addressed, which combines a negative-resistance device (IMPATT diode or GUNN element) with a varactor diode in a common imbedding. Frequency generation and multiplication are thus performed in one circuit. The oscillator can be regarded as a two-frequency device, because the imbedding is designed to support only two frequencies: the fundamental and the desired harmonic wave. In comparison with an ordinary oscillator followed by a frequency multiplier, the new circuit shows no isolator between these two components.

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