CN201927689U

CN201927689U - Filter structure suitable for magnetic solenoid focusing higher-mode MBK

Info

Publication number: CN201927689U
Application number: CN2010206017944U
Authority: CN
Inventors: 李冬凤; 翟建国; 郑建一; 张益林
Original assignee: CETC 12 Research Institute
Current assignee: CETC 12 Research Institute
Priority date: 2010-11-11
Filing date: 2010-11-11
Publication date: 2011-08-10
Anticipated expiration: 2020-11-11

Abstract

A filter structure suitable for a magnetic solenoid focusing higher-mode MBK (multi-beam klystron) belongs to the field of microwave vacuum electronic devices, comprises an output port connected with the higher-mode MBK and a mode conversion waveguide part, and is characterized by adopting a four-stage structure, wherein a first-stage filter is an output cavity of the MBK and is separated from a filter behind through a membrane I, and a second-stage filter and a third-stage filter are positioned behind the first-stage filter and at the bending corner; the second-stage filter and the third-stage filter are separated from each other through a membrane II; a membrane III is arranged behind the third-stage filter in a separated manner; a fourth-stage filter entering the vertical direction is arranged at the backmost part; and a pole shoe magnetic screen of the MBK is connected to the middle of the four-stage filter. Practical cold test shows that by adopting the four-stage filter structure, the bandwidth of the applicable higher-mode MBK is enlarged, the design process of the four-stage filter can be extensively applied to the design of filters for other wave bands, and the design substantially conforms to the practical cold test result.

Description

Be applicable to the filter construction of the higher modes multiple-beam klystron that the electromagnetic wire bag focuses on

Technical field

The utility model belongs to the microwave vacuum field of electronic devices, particularly a kind of higher modes multiple-beam klystron broadband output filter structure that is applicable to that the electromagnetic wire bag focuses on.

Background technology

High-power broadband multiple-beam klystron is the core devices of components of modern Radar, and the performance of radar is played conclusive effect.In known technology, learn, klystron is with respect to travelling wave tube, power is big, but bandwidth is narrower, development along with the modern military technology, for high-power multiple-beam klystron wish can be on its existing low-voltage, powerful advantage further broadening bandwidth, designed the multiple-stage filtering apparatus of broadening bandwidth for this reason.

For the broadening bandwidth, traditional design meeting at first considers to adopt the double gap output cavity, but its length increases, but for the klystron of permanent-magnetic focusing structure, increase cavity length and can bring the difficulty of focusing, therefore, consider to adopt the multiple filter structure to reach increasing output bandwidth is a kind of effective means.The multiple-beam klystron increase one-level filter system that works in basic mode is comparatively simple, but for working in higher modes TM ₂₂₀The multiple-beam klystron of mould, its structure are comparatively complicated.

Its output of higher modes work also needs to be converted to basic mode output, therefore also to consider the mode switch problem for export structure, and after the increase bandwidth, the problem of the flatness of its output passband when relating to cold the survey, therefore when design, to make its degree of coupling suitable, can guarantee to export the wide flatness of cold measuring tape by analog computation.

Summary of the invention

The utility model technical issues that need to address are, narrower at existing multiple-beam klystron working band, the flatness of output passband is high not enough, has wide band, as to adopt multiple filter a kind of structure in order to overcome this weak point, will to redesign out.The purpose of this utility model provides the filter construction of the higher modes multiple-beam klystron that is applicable to that the electromagnetic wire bag focuses on.The technical solution of the utility model is following realization, a kind of filter construction that is applicable to the higher modes multiple-beam klystron that the electromagnetic wire bag focuses on, comprise the output port and the mode switch waveguide part that are connected with the higher modes multiple-beam klystron, it is characterized in that, described filter construction is a quaternary structure, its first order filter is the output cavity of multiple-beam klystron, and be separated with diaphragm one between the filter of back, be to be in second of angle of bend afterwards, third level filter, these are two years old, be separated with diaphragm two between three grades of filters, be separated with diaphragm three behind the third level filter, be the fourth stage filter that enters vertical direction at last, level Four filter middle part is connected with the pole shoe magnetic cup of multiple-beam klystron.Described three diaphragms of being separated by, its thickness is the metallic plate of 2mm, corresponding to the strongest position, magnetic field, has coupling aperture.

The beneficial effects of the utility model are, through actual cold survey, the broadening of this level Four filter construction the bandwidth of the higher modes multiple-beam klystron that is suitable for, and this level Four filter design procedure can be widely used in the design of other band filter, and this design conforms to substantially with actual cold survey result.

Description of drawings

The level Four Filter Structures schematic diagram that Fig. 1 finishes for design.

Fig. 2 is the generalized section of said structure.

Fig. 3 is the diaphragm structure schematic diagram.

Embodiment

With reference to Fig. 1, the level Four Filter Structures schematic diagram that expression design is finished, being positioned at undermost among the figure is the resonant cavity of described multiple-beam klystron, also is the filter 1 of the first order, and what be attached thereto is separated with primary diaphragm 2, and being used for tuning is tuning screw pin 3.Second filter 4 is the 3rd filter 6 after secondary diaphragm 5, upwards is pole shoe magnetic cup 7 again, with magnetic cup parallel position place be tertiary membrane sheet 8, be the 4th filter 9 on this diaphragm, outmost is mode conversion waveguide 10.The place of multiple-beam klystron is led in 11 expressions.

Claims

1. filter construction that is applicable to the higher modes multiple-beam klystron that the electromagnetic wire bag focuses on, comprise the output port and the mode switch waveguide part that are connected with the higher modes multiple-beam klystron, it is characterized in that, described filter construction is a quaternary structure, its first order filter is the output cavity of multiple-beam klystron, and be separated with diaphragm one between the filter of back, be to be in second of angle of bend afterwards, third level filter, these are two years old, be separated with diaphragm two between three grades of filters, be separated with diaphragm three behind the third level filter, be the fourth stage filter that enters vertical direction at last, level Four filter middle part is connected with the pole shoe magnetic cup of multiple-beam klystron.

2. the filter construction of the higher modes multiple-beam klystron that focuses on according to the described electromagnetic wire bag of claim 1 is characterized in that, described three diaphragms of being separated by, and its thickness is the metallic plate of 2mm, corresponding to the strongest position, magnetic field, has coupling aperture.