| 摘要 |
A radio frequency oscillator having an improved varactor mounting structure and tuning slug mounting arrangement is disclosed. The varactor mounting structure includes a coaxial transmission line, one end of the center conductor thereof being capacitively coupled to the cavity of the oscillator and the other end being coupled to the varactor. The length of the center conductor is lambda /2 where lambda is the nominal operating wavelength of the oscillator and hence, while disposed outside the cavity, such varactor appears, electrically, within the cavity. A feed wire for coupling a direct current control signal to the varactor is connected between the housing of the oscillator and the center conductor at a point lambda /4 from the capacitively coupled end of the center conductor. Therefore, while such wire enables direct current to pass between the housing and the varactor, such wire is electrically isolated from the radio frequency energy in the cavity. The tuning slug mounting arrangement secures the entire periphery of tuning slugs securely within the housing.
|
