JPH0463498B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a two-cavity rectilinear klystron oscillation tube, and more specifically, to a cavity resonator of the two-cavity rectilinear klystron oscillator tube. It concerns the structure of

BACKGROUND ART In general, a two-cavity linear klystron oscillator tube, as shown in FIG. 2, includes an electron gun 1 that generates an electron flow, first and second cavity resonators 2 and 3,
A collector 4 receives an electron flow, and two cavity resonators are coupled to each other by a return path 5. In the conventional two-cavity linear klystron oscillation tube, a part of the cavity resonator is composed of a deformable diaphragm 6.

In order to adjust the oscillation frequency of the two-cavity linear klystron oscillator tube to the desired frequency, two
The resonant frequency of the two cavity resonators is set in advance to be lower than the desired frequency, and while balancing the resonant frequencies of the two cavity resonators, the diaphragm 6 is gradually recessed using a jig from the outside. was adjusted to the desired frequency.

Problems to be Solved by the Invention In the conventional method described above, in which the diaphragm section is recessed to adjust to a predetermined frequency, if the resonant frequencies of the two cavity resonators greatly deviate during this adjustment, oscillation will naturally stop, and the adjustment will fail. becomes impossible. On the other hand, in order to perform this operation while maintaining the oscillation state of the klystron oscillation tube, it is necessary to adjust the resonance frequencies of the two cavity resonators little by little to a predetermined frequency while maintaining a balance. Then, when the frequency approaches a predetermined frequency, the amount of recess of the diaphragm must be changed slightly more than during rough adjustment so that the frequency never becomes higher than the predetermined frequency. In other words, with the conventional structure, even if the diaphragm portion can be recessed, the recess cannot be restored.
Therefore, if the frequency becomes higher than the specified frequency,
Frequency adjustment required a great deal of experience and was accompanied by long adjustment times and difficulties, since the value as a product would be lost.

Therefore, the present invention aims to provide a two-cavity linear klystron oscillator tube that solves the above-mentioned conventional problems.

Specifically, the present invention provides a two-cavity rectilinear klystron oscillation tube that can return the oscillation frequency to a lower frequency even if the diaphragm of the cavity resonator is recessed to a higher frequency than the desired oscillation frequency. This is what I am trying to do.

Means for Solving the Problems That is, according to the present invention, an envelope, an electron gun, a collector fixed to the envelope so as to receive an electron flow from the electron gun, and a collector that receives an electron flow from the electron gun. In a two-cavity rectilinear klystron oscillator tube having two cavity resonators to be coupled, and a part of the cavity resonator being formed by a mechanically deformable diaphragm, the collector is mechanically deformable. has a deformable portion, the deformable portion being fixed to the envelope, and a collector electrode forming part of the cavity resonator being fixed to the collector. Furthermore, a frequency adjustment component is fixed outside the collector.

In the embodiment of the present invention, the frequency adjustment component is constituted by a screw brazed to the outer surface of the collector at a position that substantially coincides with the electron flow axis in the collector.

Function In the two-cavity linear klystron oscillator tube as described above, even if the diaphragms of the two cavity resonators are recessed too much and the oscillation stops or the frequency becomes higher than the predetermined frequency, the frequency adjustment component By attaching a jig to and pulling it, the deformable part of the collector is deformed, the collector and the collector electrode connected to it are displaced, the cavity of the second cavity resonator becomes larger, and the resonant frequency is lowered. Become. Therefore, the predetermined frequency can be adjusted again.
Therefore, the oscillation frequency can be adjusted more easily using the diaphragm than in the past.

Embodiment Hereinafter, an embodiment of a two-cavity linear klystron oscillator tube according to the present invention will be described with reference to FIG.

FIG. 1 is a longitudinal sectional view showing an embodiment of a two-cavity linear klystron oscillation tube according to the present invention.
In the illustrated two-cavity linear klystron oscillator tube, an electron gun 1 that generates an electron flow, first and second cavity resonators 2 and 3, and a collector 4 that receives an electron flow are arranged in a straight line. and is brazed to the envelope 7. The two cavity resonators are coupled to each other by a return path 5, and a portion of each cavity resonator is constituted by a deformable diaphragm 6.

Furthermore, the collector 4 has a mechanically deformable part around its periphery, namely a thin disc part 8 , which is brazed to the envelope 7 . A collector electrode 9 constituting a part of the second cavity resonator 3 is brazed to the front surface of the collector 4, and further brazed to the envelope 7 around the collector electrode 9. Further, a frequency adjustment component 10 such as a screw is brazed to the outer surface of the collector 8 at a position that substantially coincides with the axis of the electron flow.

The oscillation frequency of the two-cavity linear klystron oscillation tube having such a configuration is adjusted by recessing the diaphragm portion, as in the conventional art. During this adjustment, even if the diaphragm of one of the two cavity resonators is recessed too much and oscillation stops or the frequency becomes higher than a predetermined frequency, a jig is attached to the frequency adjustment component 10 and pulled. As a result, the disk portion 8 is deformed, the collector 4 is displaced upward in the drawing, and accordingly, the collector electrode 9 is pulled upward, deforming so as to enlarge the cavity of the second cavity resonator 3. do. In this way, the oscillation frequency is lowered and can be adjusted to a predetermined frequency while recessing the diaphragm.

Therefore, even if the frequency is adjusted higher than a predetermined value, the value of the product will not be lost.Furthermore, frequency adjustment requires a great deal of experience, takes a long time, and is difficult. can solve the problem.

Effects of the Invention As explained above, the present invention enables the cavity of the second cavity resonator of the two-cavity linear klystron oscillation tube to be widened by the frequency adjustment component, so that the diaphragm is not too concave. Even if the oscillation stops or becomes higher than the target frequency, the oscillation frequency can be lowered by pulling the frequency adjustment component, and the oscillation frequency can be adjusted to the target frequency again. Therefore, adjustment work can be carried out without the need to pay excessive attention to over-concave diaphragms as in the conventional case, and it is possible to improve product yield and work efficiency.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of an embodiment of a two-cavity linear klystron oscillation tube according to the present invention, and FIG.
FIG. 2 is a longitudinal cross-sectional view of a conventional two-cavity linear klystron oscillation tube. (Main reference number), 1... Electron gun, 2... 1st
Cavity resonator, 3... Second cavity resonator, 4... Collector, 5... Return path, 6... Diaphragm, 7...
...Envelope, 8...Collector disk section, 9...
Collector electrode, 10... Frequency adjustment component.

Claims (1)

[Claims] 1 comprising an envelope, an electron gun, a collector fixed to the envelope so as to receive an electron flow from the electron gun, and two cavity resonators coupled to the electron flow; In a two-cavity linear klystron oscillation tube in which a part of the resonator is formed by a diaphragm that is easily deformed mechanically, the collector has a mechanically deformable portion, and the deformable portion is While being fixed to the envelope, a collector electrode forming a part of the cavity resonator is fixed to the collector, and further, a frequency adjustment component is fixed to the outside of the collector. Features a two-cavity straight klystron oscillation tube.