JP2560372Y2 - Coupled cavity traveling wave tube - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coupled-cavity traveling-wave tube, and more particularly to a coupled-cavity traveling-wave tube having a matching component for impedance matching in an electrical converter between a waveguide and a coupled cavity. About a wave tube.

[0002]

2. Description of the Related Art At present, high performance and high output are required for the performance of electron tubes. To meet this need, a traveling wave tube having a coupled cavity type slow wave circuit is required. In the electric conversion section (hereinafter referred to as a coupler section) of the coupled cavity type slow wave circuit, the microwave propagates while changing the propagation mode to the coupling cavity at the input section, and changes the mode at the output section. Is propagated and extracted. In the coupler section, in order to achieve impedance matching between the waveguide and the coupling cavity, FIG.
As shown in (b), a plate-shaped matching component 1 is used.
The impedance matching is determined by the shape and the mounting position of the matching component 1. Therefore, the same matching component 1 is mounted at substantially the same position in the coupled cavity traveling wave tube of the same design. However, it is necessary to finely adjust the mounting position for each traveling wave tube due to variations in component dimensions and assembly dimensions. After the mounting position is determined, the matching component 1 is fixed to the coupler part, generally by brazing.

[0003]

However, the above-mentioned conventional matching parts are fixed by brazing, so that the matching parts float, causing a displacement, and the impedance matching is deviated from the state before brazing. Was.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a coupled cavity traveling wave tube which can maintain the impedance matching in an adjusted state without lifting and displacement of a matching component.

[0005]

SUMMARY OF THE INVENTION The present invention provides at least a coupled cavity type slow wave circuit, a waveguide section, and an electrical conversion section between the coupled cavity of the slow wave circuit and the waveguide section. A coupling cavity having a plurality of holes at eccentric positions, and a pin-shaped member for fixing the matching component to the electrical converter. Features.

[0006]

Next, an embodiment of the present invention will be described with reference to the drawings.

FIGS. 1A, 1B and 1C are diagrams showing the construction of a coupler according to an embodiment of the present invention, wherein FIG. 1A is a side view and FIG.
Is a sectional view taken along line AA ', (c) is a side sectional view, and FIGS.
(B) is a block diagram of the matching component of FIG. 1, (a) is a plan view, and (b) is a side view.

As shown in FIGS. 1A, 1B and 1C, a pin-shaped member 5 is provided on a waveguide 6 of a coupler unit 4. In the coupler section 4, the waveguide 6 and the coupling cavity 7 are electrically coupled by an electromagnetic field coupling hole 8.

As shown in FIGS. 2A and 2B, the matching component 2 has a plurality of holes 3 at eccentric positions.

The position of the pin-shaped member 5 is determined by experimentally finding the position where the matching component 2 is mounted.

By selecting one of the plurality of holes 3 of the matching component 2 and inserting the pin-shaped member 5, the fixing position of the matching component 2 can be adjusted to achieve impedance matching. In addition, the matching component 2 with the pin-shaped member 5 as the center.
By rotating, fine adjustment of the mounting position can be performed to achieve impedance matching.

After that, the alignment component 2 is fixed by brazing, but no lifting and displacement occur due to brazing. Therefore, it is possible to maintain the impedance matching in the adjusted state before brazing.

[0013]

[Effect of the Invention] As described above, in the present invention, the electrical characteristics of the coupler portion are adjusted by the matching component, and the floating state and displacement of the component during brazing of the matching component are suppressed by the pin-shaped member, and the impedance in the adjusted state is adjusted. This has the effect of maintaining alignment.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a coupler unit according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of a matching component of FIG. 1;

FIG. 3 is a configuration diagram of an example of a matching component of a conventional coupled-cavity traveling-wave tube.

[Explanation of symbols]

 1, 2 matching parts 3 hole 4 coupler part 5 pin-like member 6 waveguide 7 coupling cavity 8 electromagnetic coupling hole

Claims (1)

(57) [Scope of request for utility model registration] 1. A coupling cavity having at least a coupling cavity type slow wave circuit, a waveguide section, and a matching component disposed in an electrical conversion section between the coupling cavity of the slow wave circuit and the waveguide section. A coupled cavity traveling wave comprising: a matching component having a plurality of holes at eccentric positions; and a pin-shaped member for fixing the matching component to the electrical converter. tube.