CN113725573B

CN113725573B - Miniaturized ridge waveguide low pass filter

Info

Publication number: CN113725573B
Application number: CN202111027068.5A
Authority: CN
Inventors: 宋昕宇; 江顺喜; 周方平; 殷实; 梁国春
Original assignee: Pivotone Communication Technologies Inc
Current assignee: Pivotone Communication Technologies Inc
Priority date: 2021-09-02
Filing date: 2021-09-02
Publication date: 2022-03-18
Anticipated expiration: 2041-09-02
Also published as: CN113725573A

Abstract

The invention relates to a miniaturized ridge waveguide low-pass filter, comprising a horizontal section ridge waveguide tube and a vertical section ridge waveguide tube which are vertical to each other, and further comprising: the resonant cavity, the vertical ridge, the ridge boss, the first resonant column, the second resonant column, the third resonant column and the horizontal ridge; the resonant cavity is respectively communicated with the horizontal section ridge waveguide tube and the vertical section ridge waveguide tube; the vertical ridge is arranged at the center of the outer side surface of the vertical-section ridge waveguide tube; the ridge boss is arranged at the bottom of the vertical ridge to form a step; the first resonant column is arranged in the vertical ridge waveguide, is positioned on one side of the resonant cavity, and is opposite to and parallel to the vertical ridge; the second resonant column is arranged in the resonant cavity; the third resonant column is arranged in the resonant cavity and is positioned on one side of the horizontal section ridge waveguide tube; the horizontal ridge is disposed within the horizontal segment ridge waveguide. The filter integrates the resonance column part and the right-angle turning part, is convenient for 90-degree turning transmission of signals, and has small volume, light weight and low cost.

Description

Miniaturized ridge waveguide low pass filter

Technical Field

The invention relates to a filter, in particular to a miniaturized ridge waveguide low-pass filter.

Background

The common waveguide band-pass filter has poor far-end signal suppression and cannot meet the requirements of a communication system, so that the low-pass filter becomes an indispensable part in a microwave communication system. The common sugarcoated haw low-pass filter has the advantages of large volume, high processing requirement, high cost and poor inhibition effect on far-end signals.

Disclosure of Invention

In order to solve the above problems, the present invention provides a miniaturized ridge waveguide low pass filter in which a resonance column part and a quarter turn part are integrated into a whole, which not only facilitates 90-degree turn transmission of signals, but also can greatly reduce the volume and weight, thereby reducing the cost and having a good effect of suppressing far-end signals, and the specific technical scheme is as follows:

a miniaturized ridge waveguide low pass filter includes a horizontal segment ridge waveguide tube and a vertical segment ridge waveguide tube which are perpendicular to each other, and further includes: the resonant cavity is positioned between the horizontal section ridge waveguide tube and the vertical section ridge waveguide tube and is respectively communicated with the horizontal section ridge waveguide tube and the vertical section ridge waveguide tube; a vertical ridge disposed on an outer side of the vertical segment ridge waveguide at a center of the outer side; a ridge boss disposed at a bottom of the vertical ridge, the ridge boss forming a step with the vertical ridge; the first resonant column is arranged in the vertical ridge waveguide and positioned on one side of the resonant cavity, and the first resonant column is also arranged opposite to the vertical ridge and is parallel to the vertical ridge; a second resonant column disposed within the resonant cavity; the third resonant column is arranged in the resonant cavity and is positioned on one side of the horizontal section ridge waveguide tube, and the first resonant column, the second resonant column and the third resonant column are parallel to each other; and the horizontal ridge is arranged in the horizontal ridge waveguide tube and is positioned on one side of the third resonant column.

Preferably, the outer side surface of the first resonant column is flush with the inner side surface of the vertical section ridge waveguide.

Preferably, the height of the second resonant column is higher than that of the first resonant column and that of the third resonant column, and the top of the second resonant column is lower than that of the resonant cavity.

Compared with the prior art, the invention has the following beneficial effects:

the miniaturized ridge waveguide low-pass filter integrates the resonance column part and the right-angle turning part, so that 90-degree turning transmission of signals is facilitated, the size can be greatly reduced, the weight is reduced, and the cost is reduced; the method also has wide relative bandwidth, low standing wave and small insertion loss, and has excellent effect of inhibiting far-end signals.

Drawings

FIG. 1 is a schematic structural diagram of a miniaturized ridge waveguide low-pass filter;

FIG. 2 is a front view of a miniaturized ridge waveguide low pass filter;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a rear view of a miniaturized ridge waveguide low pass filter;

FIG. 5 is a passband waveform for the low pass simulation;

fig. 6 is a low-pass suppression waveform.

Detailed Description

The invention will now be further described with reference to the accompanying drawings.

As shown in fig. 1 to 6, a miniaturized ridge waveguide low pass filter includes: the resonator comprises a horizontal section ridge waveguide 1, a vertical section ridge waveguide 2, a resonant cavity 7, a vertical ridge 9, a ridge boss 3, a first resonant column 4, a second resonant column 5, a third resonant column 6 and a horizontal ridge 8.

The horizontal section ridge waveguide tube 1 is vertical to the vertical section ridge waveguide tube 2; the resonant cavity 7 is positioned between the horizontal section ridge waveguide tube 1 and the vertical section ridge waveguide tube 2 and is respectively communicated with the horizontal section ridge waveguide tube 1 and the vertical section ridge waveguide tube 2, and the vertical ridge 9 is arranged on the outer side surface of the vertical section ridge waveguide tube 2 and is positioned at the center of the outer side surface; the ridge boss 3 is arranged at the bottom of the vertical ridge 9, and the ridge boss 3 and the vertical ridge 9 form a step structure; the first resonant column 4 is arranged in the vertical section ridge waveguide tube 2 and is positioned at one side of the resonant cavity 7, the first resonant column 4 is also arranged opposite to the vertical ridge part 9 and is parallel to the vertical ridge part 9, and the outer side surface of the first resonant column 4 is flush with the inner side surface of the vertical section ridge waveguide tube 2; the second resonant column 5 is arranged in the resonant cavity 7; the third resonant column 6 is arranged in the resonant cavity 7 and is positioned at one side of the horizontal section ridge waveguide tube 1, and the first resonant column 4, the second resonant column 5 and the third resonant column 6 are parallel to each other; the height of the second resonant column 5 is higher than that of the first resonant column 4 and the third resonant column 6, and the top of the second resonant column 5 is lower than that of the resonant cavity 7; the horizontal ridge 8 is disposed in the horizontal segment ridge waveguide 1 and is located on one side of the third resonant column 6.

The horizontal section ridge waveguide tube 1 consists of a cavity and a cover plate, and the vertical section ridge waveguide tube 2 can be directly processed; a ridge boss 3 is processed on the vertical ridge 9, the ridge boss 3 is positioned at the bottom, the ridge boss 3 forms a step, the step plays a good matching role at the turning position so as to facilitate 90-degree transmission of signals, the step can also well control the coupling with the first resonance column 4, the closer the step is to the first resonance column 4, the stronger the coupling is, and the weaker the step is, so that the bandwidth of the low-pass filter is well controlled; the first resonant column 4 is processed on the wide wall of the vertical ridge waveguide, as shown in fig. 4 and 5, the first resonant column 4 not only can greatly increase the volume of the low-pass filter, but also can be well coupled with the ridge boss 3, so that the bandwidth and echo can be well controlled; first resonance post 4, second resonance post 5 and third resonance post 6 are strong and weak through mutual distance control coupling, and wherein the higher difficult processing of second resonance post 5 has processed resonant cavity 7 in its outside, and the height of second resonance post 5 can be dwindled to this structure to the processing degree of difficulty of second resonance post 5 has been reduced.

The miniaturized ridge waveguide low-pass filter has the characteristics of convenience in signal 90-degree transmission, stable performance, easiness in processing, small size, good consistency and the like.

Fig. 5 and 6 are simulation graphs of the ridge waveguide low-pass filter, and it can be seen from the simulation graphs that the ridge waveguide low-pass filter of the structure has very good performance.

The miniaturized ridge waveguide low-pass filter integrates the resonance column part and the right-angle turning part, so that 90-degree turning transmission of signals is facilitated, the size can be greatly reduced, the weight is reduced, the cost is reduced, the wide relative bandwidth is achieved, the standing wave is low, the insertion loss is small, and meanwhile, the suppression effect on far-end signals is good.

The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive step, which shall fall within the scope of the appended claims.

Claims

1. A miniaturized ridge waveguide low pass filter includes a horizontal segment ridge waveguide tube (1) and a vertical segment ridge waveguide tube (2) which are perpendicular to each other, and is characterized by further comprising:

the resonant cavity (7) is positioned between the horizontal section ridge waveguide tube (1) and the vertical section ridge waveguide tube (2), and the resonant cavity (7) is respectively communicated with the horizontal section ridge waveguide tube (1) and the vertical section ridge waveguide tube (2);

a vertical ridge (9), the vertical ridge (9) being disposed on an outer side of the vertical segment ridge waveguide (2) at a center of the outer side;

a ridge boss (3), the ridge boss (3) being disposed at the bottom of the vertical ridge (9), the ridge boss (3) forming a step with the vertical ridge (9);

the first resonant column (4) is arranged in the vertical ridge waveguide tube (2) and positioned on one side of the resonant cavity (7), and the first resonant column (4) is also arranged opposite to the vertical ridge (9) and is parallel to the vertical ridge;

a second resonant column (5), the second resonant column (5) being disposed within the resonant cavity (7);

the third resonant column (6) is arranged in the resonant cavity (7) and is positioned on one side of the horizontal section ridge waveguide tube (1), and the first resonant column (4), the second resonant column (5) and the third resonant column (6) are parallel to each other; and

a horizontal ridge (8), wherein the horizontal ridge (8) is arranged in the horizontal section ridge waveguide tube (1) and is positioned at one side of the third resonant column (6).

2. A miniaturized ridge waveguide low pass filter according to claim 1, characterized in that the outer side of said first resonator column (4) is flush with the inner side of said vertical section ridge waveguide (2).

3. A miniaturized ridge waveguide low pass filter according to claim 1, characterized in that the height of said second resonator column (5) is higher than the height of said first (4) and third (6) resonator columns, and the top of said second resonator column (5) is lower than the top of said resonator cavity (7).