Patent ID: 9035707
Filing Date: 2015-05-19
Classification: H01J,H03B,H03L

Abstract:
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.