| 摘要 |
A lumped element microwave oscillator is mounted on the back plate secured to a wave guide for generating electromagnetic waves which propagate through the wave guide. The oscillator includes a two-terminal solid-state device, such as a Gunn diode, which exhibits negative resistance in the microwave range, connected in circuit with a dc source and lumped elements, including a variable capacitive element. The variable capacitive element is accessible without removing the back plate from the wave guide so that the capacitance can be easily adjusted for controlling the frequency of the oscillator. The power of the electromagnetic waves which propagate through the wave guide is preferably controlled by adjusting the coupling between the oscillator and the load in two ways. The physical orientation of various lumped elements mounted on the back plate can be adjusted with respect to the plane of the E field in the wave guide for controlling the coupling between the oscillator and the load in steps. Also, the lateral positional relationship of the back plate with respect to the wave guide can be adjusted for infinitely controlling the coupling between the oscillator and the load.
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