CN112787056A - Adjustable cavity filter - Google Patents

Abstract

Translated fromChinese

本发明公开了一种可调节式腔体滤波器，包括盖板（1）、调谐螺杆（2）、腔体（3）、还包括：可调式谐振柱（5），所述可调式谐振柱（5）的底部设有凸台，所述腔体的底部开设有供凸台伸出的通孔，所述凸台至少伸出腔体外的部分具有外螺纹，所述外螺纹上螺纹配合有螺母（6）。本发明的有益效果是将可调谐振柱装入腔体由螺母固定即可，通过调节可调式揩振柱来调节频率，实现研发样品初期可通知可调谐振来快速调试出所需频率，减少研发样品二次或多次试做样品和客户样品交期时间以及降低研发成本。

The invention discloses an adjustable cavity filter, comprising a cover plate (1), a tuning screw (2), a cavity (3), and further comprising: an adjustable resonance column (5), the adjustable resonance column (5) The bottom of the cavity is provided with a boss, the bottom of the cavity is provided with a through hole for the boss to extend, and at least the part of the boss that extends out of the cavity has an external thread, and the external thread is threaded with a Nut (6). The beneficial effect of the present invention is that the adjustable resonance column can be installed into the cavity and fixed by a nut, and the frequency can be adjusted by adjusting the adjustable vibration column, so that the adjustable resonance can be notified to quickly debug the required frequency in the early stage of research and development of samples, and the reduction of R&D samples, trial production of samples and customer sample delivery time for two or more times, and reduce R&D costs.

Description

Adjustable cavity filter

Technical Field

The invention relates to the field of mobile communication, in particular to an adjustable cavity filter.

Background

With the rapid development of wireless communication technology, the spectrum resources are increasingly tense, and the requirements on the frequency band of the filter are more and more. Therefore, the cavity depth and the size of the cavity filter adopt more and more sizes in the design process, and the debugging mode of the resonant column is simpler in the cavity filter. The existing filter only debugs frequency through a stud on a cover plate, as shown in fig. 1-2, and needs secondary processing when a sample is made at one time without a debugging frequency index and the frequency does not meet the requirement, so that the processing cost and the research and development period are prolonged, and the loss of company projects and customers is caused. The chinese utility model patent publication No. CN112072233A discloses a high-pass radio frequency filter, which comprises a resonant cavity, a cover plate and a resonant column disposed in the resonant cavity, wherein the length of the resonant column is adjustable, the resonant column is connected with a tuning screw, the tuning screw penetrates out from the cover plate and realizes the resonant column to adjust the working length in the resonant cavity, the resonant column comprises a fixed part fixedly connected with the inner surface of the cover plate and a movable part sleeved with the fixed part, and the movable part is fixedly connected with the tuning screw; although the length of the resonant column of the filter is adjustable, the filter has a complex structure, comprises a fixed part and a movable part, and can be operated only by opening the cavity when the adjustment is needed.

Disclosure of Invention

The invention aims to solve the technical problem that the length of a resonant column cannot be conveniently adjusted by using the conventional cavity filter, and therefore, the adjustable cavity filter is provided.

The technical scheme of the invention is as follows: the utility model provides an adjustable cavity filter, includes apron, tuning screw rod, cavity, still includes: the adjustable resonant column is characterized in that a boss is arranged at the bottom of the adjustable resonant column, a through hole for the boss to extend out is formed in the bottom of the cavity, an external thread is arranged at the part of the boss extending out of the cavity at least, and a nut is matched with the external thread in a threaded manner.

In the scheme, the length of the boss exceeds the thickness of the bottom of the cavity.

In the scheme, the adjustable resonant column is cylindrical.

In the scheme, the tuning screw is fixed on the cover plate through the cover plate nut.

In the scheme, external threads are distributed on the boss along the axial direction of the boss.

The adjustable resonant column is arranged in the cavity and fixed by the nut, the frequency is adjusted by adjusting the adjustable resonant column, the adjustable resonance can be informed to quickly adjust the required frequency at the initial stage of sample research and development, the time of sample development for two or more times of sample trial and sample preparation and the time of sample delivery of customers are reduced, and the research and development cost is reduced.

Drawings

FIG. 1 is a schematic view of a prior art resonant column prior to assembly;

FIG. 2 is a schematic diagram of a prior art resonating column after assembly;

FIG. 3 is a schematic view of the present invention prior to assembly;

FIG. 4 is a schematic view of the invention after assembly;

in the figure, the adjustable resonant column comprises acover plate 1, acover plate 2, atuning screw rod 3, acavity 4, acover plate nut 5, an adjustableresonant column 6 and a nut.

Detailed Description

The technical scheme in the embodiment of the invention is clearly and completely described below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments based on the embodiments in the present invention, without any inventive work, will be apparent to those skilled in the art from the following description.

As shown in fig. 3-4, the present invention comprises:apron 1,tuning screw 2,cavity 3 still include:resonance post 5 with adjustable,resonance post 5's bottom with adjustable is equipped with the boss, the through-hole that supplies the boss to stretch out is seted up to the bottom of cavity, the boss stretches out the part outside the cavity at least and has the external screw thread, screw-thread fit hasnut 6 on the external screw thread.

The purpose of the invention is: 1. the number of times of modification and the sample delivery period can be reduced in the initial development stage; 2. reducing the research and development cost for the company.

As an embodiment of the present invention, thetuning screw 2 is fixed on the cover plate by acover nut 4, and theadjustable resonance post 5 is cylindrical. The length of the boss exceeds the thickness of the bottom of the cavity.

As an embodiment of the invention, the part of the boss extending out of the cavity body is provided with an external thread, the external thread is in threaded fit with a nut, and the matching degree of the adjustable resonance column and the tuning screw is adjusted by adjusting the length of the part of the boss outside the cavity body.

As an embodiment of the invention, the boss has an external thread distributed along its axial direction. The degree of adjustment of the adjustable resonant column is thus higher.

Claims (5)

Translated fromChinese

1.一种可调节式腔体滤波器，包括盖板（1）、调谐螺杆（2）、腔体（3）、其特征是：还包括：可调式谐振柱（5），所述可调式谐振柱（5）的底部设有凸台，所述腔体的底部开设有供凸台伸出的通孔，所述凸台至少伸出腔体外的部分具有外螺纹，所述外螺纹上螺纹配合有螺母（6）。1. An adjustable cavity filter, comprising a cover plate (1), a tuning screw (2), and a cavity (3), characterized in that it further comprises: an adjustable resonance column (5), the adjustable The bottom of the resonance column (5) is provided with a boss, the bottom of the cavity is provided with a through hole for the boss to extend, and the boss at least extends out of the cavity with an external thread, and the external thread is threaded Fitted with a nut (6).2.如权利要求1所述的一种可调节式腔体滤波器，其特征是：所述凸台的长度超过腔体底部的厚度。2 . The adjustable cavity filter according to claim 1 , wherein the length of the boss exceeds the thickness of the bottom of the cavity. 3 .3.如权利要求1所述的一种可调节式腔体滤波器，其特征是：所述可调式谐振柱（5）呈圆柱形。3 . The adjustable cavity filter according to claim 1 , wherein the adjustable resonance column ( 5 ) is cylindrical. 4 .4.如权利要求1所述的一种可调节式腔体滤波器，其特征是：所述调谐螺杆（2）通过盖板螺母（4）固定在盖板上。4 . The adjustable cavity filter according to claim 1 , wherein the tuning screw ( 2 ) is fixed on the cover plate through a cover plate nut ( 4 ). 5 .5.如权利要求1所述的一种可调节式腔体滤波器，其特征是：所述凸台沿其轴向分布有外螺纹。5 . The adjustable cavity filter according to claim 1 , wherein the boss has external threads distributed along its axial direction. 6 .

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