Microwave tube

Abstract

An output power adjusting mechanisms for adjusting output power is provided on a wave guide of a high frequency output section coupled to an output cavity. The output power adjusting mechanisms is located at a position apart away from the output cavity by a distance of ⅛ wavelength or [(⅛ wavelength)×odd number]. The output power adjusting mechanism includes a reflection adjusting part which is provided in the tube wall of the wave guide so as to be displaceable in the inward and outward directions of the output tube. The output power is adjusted by displacing the reflection adjusting part.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention, and together with the general description given above and the detailed description of the embodiments given below, serve to explain the principles of the invention.

FIG. 1 is a cross sectional view showing an output cavity and high frequency output sections of a klystron, which is a first embodiment of the invention;

FIG. 2 is a plan view showing the output cavity and the high frequency output sections of the klystron;

FIG. 3 is an enlarged cross sectional view showing an output power adjusting mechanisms of the klystron;

FIG. 4 is a cross sectional view showing the klystron;

FIG. 5 is a cross sectional view showing an output cavity and high frequency output sections of a klystron, which is a second embodiment of the invention;

FIG. 6 is a plan view showing the output cavity and the high frequency output sections of the klystron; and

FIG. 7 is a perspective view showing a power mixer/divider used for a conventional klystron.

Claims

1. A microwave tube having a high frequency output section coupled to an output cavity, wherein the high frequency output section includes:an output tube connected to the output cavity; andan output power adjusting mechanism which has a reflection adjusting part provided in the tube wall of the output tube so as to be displaceable in the inward and outward directions of the output tube, and which adjusts the output power by displacing the reflection adjusting part.

2. The microwave tube according to claim 1, wherein a plurality of high frequency output sections are provided, each of which is coupled to the output cavity.

3. The microwave tube according to claim 1, wherein the output power adjusting mechanism is apart away from the output cavity by a distance of ⅛ wavelength or [(⅛ wavelength)×odd number].

4. The microwave tube according to claim 1, wherein the output tube takes a rectangular shape defined by long and short sides, and the output power adjusting mechanism is either provided on the long side of the rectangular shape of the output tube for capacitive adjustment, or provided on the short side for inductive adjustment.