Frequency-tunable oscillator comprising an oscillating diode and a variable-capacity diode, and a mechanical tuning method for such an oscillator

摘要

1. Frequency-tunable oscillator, constituted by an oscillating diode and a variable-capacity diode assembled to form one unitary component (10) mounted in a recess (11), the electrical mass of the oscillator being taken from the base (3) of the oscillating diode (1), the polarisation voltage of the oscillating diode being supplied through a first lateral piston (12) which is isolated (13) and rests on a first metallic disc (7) interposed between the two diodes and electrically connected with said diodes, the polarisation voltage of the variable-capacity diode (2) being supplied through a second piston (14) which is isolated (15) and rests on a second metallic disc (5) constituting the base of the variable-capacity diode (2), said oscillator being characterized in that it is continuously tunable by a mechanical means constituted by a metallic sleeve (17) movable about the second piston (14) with which it is held in soft mechanical contact, the displacement of said sleeve (17) along the piston (14), while causing the diameter of this electric connection to vary, results in trying the inductance in series with the diodes (1 and 2) and allows the mean oscillation frequency to be adjusted.