Method for varying oscillation frequency of high frequency oscillator

摘要

The switching element is provided in a state of being electromagnetically coupled to the cavity resonator of the high frequency oscillator; the bias voltage applying terminal is connected to one electrode of the switching element; another electrode of the switching element is electrically connected to the cavity resonator (the anode shell in FIG. 1); the metal plate having a size enough for reflecting an electric wave to be transmitted before and after the switching element in a high-frequency manner is provided at any one end of the switching element; and by applying a bias voltage to the switching element and varying that, a reactance of the switching element is changed and a resonance frequency of the cavity resonator is varied. By this method, an oscillation frequency can be varied greatly relative to a small change in a bias voltage.

主权项

1. A method for varying an oscillation frequency of a high frequency oscillator having a cavity resonator, comprising:
providing a switching element in a state of being electromagnetically coupled to the cavity resonator of the high frequency oscillator; connecting a bias voltage applying terminal to one electrode of the switching element; connecting electrically an another electrode of the switching element to the cavity resonator; providing, at any one end of the switching element, a metal plate having a size enough for reflecting a high frequency wave to be transmitted through the switching element, so that the high frequency wave transmitted through the switching element in a state of being electromagnetically coupled to the cavity resonator is reflected by the metal plate; making a bias current flow through the metal plate and the switching element by applying a bias voltage to the switching element; and varying the bias voltage, and thereby changing a reactance of the switching element and a resonance frequency of the cavity resonator.