CN203119067U - Cavity filter - Google Patents

Cavity filter Download PDF

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Publication number
CN203119067U
CN203119067U CN 201320040731 CN201320040731U CN203119067U CN 203119067 U CN203119067 U CN 203119067U CN 201320040731 CN201320040731 CN 201320040731 CN 201320040731 U CN201320040731 U CN 201320040731U CN 203119067 U CN203119067 U CN 203119067U
Authority
CN
China
Prior art keywords
cavity
filter
resonant rod
rod
boss
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN 201320040731
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Chinese (zh)
Inventor
朱银虎
袁进华
朱其玉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to CN 201320040731 priority Critical patent/CN203119067U/en
Application granted granted Critical
Publication of CN203119067U publication Critical patent/CN203119067U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a cavity filter, which relates to the communication technical field. The cavity filter is provided to achieve the aim of having the power capacity increased and the frequency adjusting range enlarged on the premise that the cavity depth of the filter is decreased. The cavity filter comprises a cavity body with an opening on the upper end, a cover plate, a tuning screw and a resonance rod. The resonance rod is fixed on the bottom plate of the cavity body and accommodated inside the cavity body. The cover plate is fixedly arranged on the opening part of the cavity body. A screw hole is arranged on the cover plate. The tuning screw cooperates with the screw hole and has one end pass through the cover plate and further inserted into the cavity body. The central part of the resonance rod is provided with a through hole. The tuning screw is inserted into the through hole. The outer walls of the resonance rod are fixedly connected with the bottom plate of the cavity body. The filter can have the power capacity increased and the frequency adjusting range enlarged on the premise that the cavity depth of the filter is reduced.

Description

Cavity body filter
Technical field
The utility model relates to the communication technology, relates in particular to a kind of cavity body filter.
Background technology
Filter is a kind of electromagnetic wave signal to be had the device of processing effect, and it mainly acts on and is: allow useful signal zero-decrement passing through as far as possible, the reflection big as far as possible to unwanted signal.At present, generally adopt cavity body filter to carry out the frequency selection to transmitting or receiving signal in the base station system.Cavity body filter generally includes cavity, resonant rod, tuning screw rod and cover plate.Cavity is provided with a plurality of cavitys, and resonant rod is combined with cavity, and is contained in the cavity, and cover plate is installed in the opening part of cavity, and cover plate is provided with a plurality of screws, and the position of screw is corresponding with resonant rod.Tuning screw rod cooperates with screw, and the one end stretches in the resonant rod after passing cover plate.Under certain power, adjust the frequency of filter by regulating length that tuning screw rod stretches into resonant rod.Along with the fast development of microwave wireless communication, the popularizing of wireless telecommunications, operator is more and more stronger to miniaturization, the lightweight demand of cavity body filter.
In the prior art, in order to reduce the volume of cavity body filter, usually the chamber of the cavity of filter is done deeply for a short time, but do for a short time deeply along with the chamber of filter, the power capacity of filter and the adjustable range of frequency also can diminish thereupon.Therefore, do deeply under the little situation in filter cavity, how to improve the power capacity of filter and the adjustable range of frequency and just become the primary technical barrier that solves in cavity body filter field.
The utility model content
The utility model provides a kind of cavity body filter, does under the little situation purpose of the power capacity of raising filter and the adjustable range of frequency deeply to reach in filter cavity.
For achieving the above object, the utility model adopts following technical scheme:
On the one hand, a kind of cavity body filter is provided, the cavity, cover plate, tuning screw rod and the resonant rod that comprise upper end open, described resonant rod is fixed on the base plate of described cavity and is contained in the described cavity, described cover plate is fixedly mounted on the opening part of described cavity, and described cover plate is provided with screw, described tuning screw rod cooperates with described screw and an end passes described cover plate and stretches in the described cavity, wherein, be provided with through hole in the middle of the described resonant rod, described tuning screw rod stretches in the described through hole, and the outer wall of described resonant rod is fixedlyed connected with the base plate of described cavity.
In first kind of possible implementation, the dark direction in chamber, base plate upper edge of described cavity is provided with the boss that cross section is annulus, and the outer wall of described resonant rod and the inwall of described boss are connected.
In conjunction with first kind of possible implementation, in second kind of possible implementation, the inwall of described boss is provided with internal thread, and the lower end outer wall of described resonant rod is provided with the external screw thread with described screw-internal thread fit.
In the third possible implementation, described through hole is along the hexagon that is shaped as on the top of the dark direction in chamber.
In the 4th kind of possible implementation, described resonant rod is provided with the installing hole of at least two symmetries along the upper surface of the dark direction in chamber.
In conjunction with first kind of possible implementation, in the 5th kind of possible implementation, the outer wall of described resonant rod is connected with the inwall interference fit of described boss.
In the 6th kind of possible implementation, described resonant rod has extended radially outward step near the position that is connected with described boss, and described step is overlapped on the top planes of described boss.
In the 7th kind of possible implementation, described resonant rod radially outwards is provided with flange.
According to embodiment of the present utility model, because the centre of resonant rod is provided with through hole, tuning screw rod stretches in the through hole and the outer wall of resonant rod is fixedlyed connected with the base plate of cavity, therefore tuning screw rod can extend into position near the base plate of cavity on the dark direction in chamber, through hole in the resonant rod can be fully utilized to realize the increase of tuning screw rod adjusting surplus like this, thereby reaches the purpose of the adjustable range that improves filter frequencies.So the cavity body filter in the utility model is done the purpose that still can realize the adjustable range of raising filter power capacity and frequency under the little situation by the adjusting surplus that improves tuning screw rod deeply in the chamber.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the utility model embodiment, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The cutaway view of the structure of the cavity body filter that Fig. 1 provides for the utility model embodiment;
Fig. 2 is partial schematic diagram shown in Figure 1;
Fig. 3 is the cutaway view of resonant rod shown in Figure 1;
The perspective view of the cavity body filter that Fig. 4 provides for the utility model embodiment;
Another perspective view of the cavity body filter that Fig. 5 provides for the utility model embodiment;
The cutaway view of another structure of the cavity body filter that Fig. 6 provides for the utility model embodiment;
Fig. 7 is the cutaway view of resonant rod shown in Figure 6;
Fig. 8 is partial schematic diagram shown in Figure 6.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, the every other embodiment that those of ordinary skills obtain under the prerequisite of not making creative work belongs to the scope that the utility model is protected.
As Fig. 1 and shown in Figure 6, the specific embodiment of the cavity body filter that provides for the utility model, this cavity body filter is single cavity filter, the cavity 11 that comprises upper end open, cover plate 12, tuning screw rod 13 and resonant rod 14, resonant rod 14 is fixed on the base plate 16 of cavity 11 and is contained in the cavity 11, cover plate 12 can be fixedly mounted on the opening part of cavity 11 by the mode of screw connection or welding, and cover plate 12 is provided with screw, tuning screw rod 13 cooperates with screw and an end passes cover plate 12 and stretches in the cavity 11, wherein, be provided with through hole 15 in the middle of the resonant rod 14, tuning screw rod 13 stretches in the through hole 15, and the outer wall of resonant rod 14 is fixedlyed connected with the base plate 16 of cavity 11.
The cavity body filter that the utility model embodiment provides, because the centre of resonant rod 14 is provided with through hole 15, tuning screw rod 13 stretches in the through hole 15 and the outer wall of resonant rod 14 is fixedlyed connected with the base plate 16 of cavity 11, therefore tuning screw rod 13 can extend into position near the base plate 16 of cavity 11 on the dark direction in chamber, through hole 15 in the resonant rod 14 can be fully utilized to realize the increase of tuning screw rod 13 adjusting surpluses like this, thereby reaches the purpose of the adjustable range that improves filter frequencies.So the cavity body filter in the utility model is done the purpose that still can realize the adjustable range of raising filter power capacity and frequency under the little situation by the adjusting surplus that improves tuning screw rod deeply in the chamber.
As Fig. 1, Fig. 2, Fig. 6 and shown in Figure 8, as the further improvement of above-described embodiment, the dark direction in chamber, base plate 16 upper edge of cavity 11 is provided with the boss 17 that cross section is annulus, and the inwall of the outer wall of resonant rod 14 and boss 17 is connected.This connected mode is simple and easy to realize relatively, can reduce the thickness of well floor simultaneously to a certain extent, realizes the lightweight of cavity body filter.Wherein boss 17 can with cavity 11 integrally casting moulding, also can the base plate 16 of cavity 11 be fixed together with boss 17 by later stage welding or other connected mode.
Resonant rod 14 and the mode of being connected of boss 17 can adopt and be threaded (referring to Fig. 1) or interference fit is connected (referring to Fig. 6) in above-described embodiment.When employing is threaded, as shown in Figures 2 and 3, can be on the inwall of boss 17 machining internal thread 22, the external screw thread 31 that cooperates with internal thread 22 in the processing of the lower end of resonant rod 14 outer wall.The part with external screw thread 31 of resonant rod 14 need be screwed in the endoporus 21 of boss 17 during installation, make it to be connected with the internal thread 22 of boss 17.The installation of resonant rod 14 for convenience, as shown in Figure 4, we can be designed to hexagon with the shape on the top of the through hole 15 in the resonant rod 14, we can be that hexagonal erecting tools 41 is installed resonant rod 14 by cross section like this, end with erecting tools 41 during concrete the installation inserts in the hexagonal hole of resonant rod 14, and the other end that rotates erecting tools 41 then screws in resonant rod 14 in the endoporus with internal thread 22 21 of boss 17.Also can be as shown in Figure 5, the installing hole 512 of at least two symmetries is set in the upper surface of resonant rod 14, so just can resonant rod 14 be installed by erecting tools 51, two shanks 511 with erecting tools 51 lower ends during installation insert in the installing hole 512, and the installation of resonant rod 14 is realized on the top that manually rotates erecting tools 51.
When employing interference fit as shown in Figure 6 connects, the external diameter of resonant rod 14 bottoms can be designed more slightly larger than the external diameter of boss 17, when mounted, be pressed in the endoporus 21 of boss 17 by crimping or the mode that the presses lower end with resonant rod 14, realize that resonant rod 14 is connected with the interference fit of boss 17.
As Fig. 3 and shown in Figure 7, when resonant rod 14 is installed, spacing with the installation of boss 17 in order to realize resonant rod 14, can extend radially outward near the position that is connected with boss 17 at resonant rod 14 step 32 is set, step 332 is overlapped on the top planes of boss 17.Like this when resonant rod 14 screws in or be pressed in the endoporus 21 of boss 17, proof is in place when step 32 is overlapped on the top planes of boss 17, avoids installing shallowly causing inadequately firmly or the dark accuracy that influences frequency being installed.Wherein step 32 is preferred and resonant rod 14 is one-body molded.
Since filter cavity do deeply little after, frequency can improve thereupon, for frequency being dropped to needed frequency range, as Fig. 3 and shown in Figure 7, at resonant rod 14 flange 18 outwards is set radially.Flange 18 is preferred and resonant rod 14 is one-body molded.
As Fig. 1 and shown in Figure 6, be connected with nut 19 on the tuning screw rod 13, when regulating tuning screw rod 13, at first nut 19 is unscrewed like this, when being adjusted to the position that needs, screw nut 19 adjusting screw(rod) 13 and cover plate 12 are fixed together.
The above; it only is embodiment of the present utility model; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of described claim.

Claims (8)

1. cavity body filter, the cavity, cover plate, tuning screw rod and the resonant rod that comprise upper end open, described resonant rod is fixed on the base plate of described cavity and is contained in the described cavity, described cover plate is fixedly mounted on the opening part of described cavity, and described cover plate is provided with screw, described tuning screw rod cooperates with described screw and an end passes described cover plate and stretches in the described cavity, it is characterized in that, be provided with through hole in the middle of the described resonant rod, described tuning screw rod stretches in the described through hole, and the outer wall of described resonant rod is fixedlyed connected with the base plate of described cavity.
2. cavity body filter according to claim 1 is characterized in that, the dark direction in chamber, base plate upper edge of described cavity is provided with the boss that cross section is annulus, and the outer wall of described resonant rod and the inwall of described boss are connected.
3. cavity body filter according to claim 2 is characterized in that, the inwall of described boss is provided with internal thread, and the lower end outer wall of described resonant rod is provided with the external screw thread with described screw-internal thread fit.
4. cavity body filter according to claim 3 is characterized in that, described through hole is along the hexagon that is shaped as on the top of the dark direction in chamber.
5. cavity body filter according to claim 3 is characterized in that, described resonant rod is provided with the installing hole of at least two symmetries along the upper surface of the dark direction in chamber.
6. cavity body filter according to claim 2 is characterized in that, described resonant rod is connected with described boss interference fit.
7. according to each described cavity body filter among the claim 3-6, it is characterized in that described resonant rod has extended radially outward step near the position that is connected with described boss, described step is overlapped on the top planes of described boss.
8. cavity body filter according to claim 1 is characterized in that, described resonant rod radially outwards is provided with flange.
CN 201320040731 2013-01-25 2013-01-25 Cavity filter Expired - Fee Related CN203119067U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201320040731 CN203119067U (en) 2013-01-25 2013-01-25 Cavity filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201320040731 CN203119067U (en) 2013-01-25 2013-01-25 Cavity filter

Publications (1)

Publication Number Publication Date
CN203119067U true CN203119067U (en) 2013-08-07

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103094649A (en) * 2013-01-25 2013-05-08 华为技术有限公司 Cavity filter
CN103531879A (en) * 2013-10-24 2014-01-22 江苏贝孚德通讯科技股份有限公司 Resonator
CN103760174A (en) * 2014-02-08 2014-04-30 四川环龙技术织物有限公司 Automatic calibrating microwave moisture measuring equipment for papermaking felt
CN104681906A (en) * 2015-02-26 2015-06-03 东莞鸿爱斯通信科技有限公司 Cavity filter
CN104795615A (en) * 2014-01-22 2015-07-22 鸿富锦精密工业(深圳)有限公司 Cavity filter
CN105071006A (en) * 2015-08-31 2015-11-18 北京遥测技术研究所 Novel orthogonal mode coupler
CN112072233A (en) * 2020-08-24 2020-12-11 安徽蓝讯电子科技有限公司 High-pass radio frequency filter

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103094649A (en) * 2013-01-25 2013-05-08 华为技术有限公司 Cavity filter
CN103094649B (en) * 2013-01-25 2016-12-28 华为技术有限公司 Cavity body filter
WO2014114265A1 (en) * 2013-01-25 2014-07-31 华为技术有限公司 Cavity filter
CN103531879A (en) * 2013-10-24 2014-01-22 江苏贝孚德通讯科技股份有限公司 Resonator
CN104795615A (en) * 2014-01-22 2015-07-22 鸿富锦精密工业(深圳)有限公司 Cavity filter
CN104795615B (en) * 2014-01-22 2019-03-05 鸿富锦精密工业(深圳)有限公司 Cavity filter
CN103760174A (en) * 2014-02-08 2014-04-30 四川环龙技术织物有限公司 Automatic calibrating microwave moisture measuring equipment for papermaking felt
CN104681906A (en) * 2015-02-26 2015-06-03 东莞鸿爱斯通信科技有限公司 Cavity filter
CN105071006A (en) * 2015-08-31 2015-11-18 北京遥测技术研究所 Novel orthogonal mode coupler
CN105071006B (en) * 2015-08-31 2017-09-29 北京遥测技术研究所 A kind of new orthomode coupler
CN112072233A (en) * 2020-08-24 2020-12-11 安徽蓝讯电子科技有限公司 High-pass radio frequency filter

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GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130807

Termination date: 20170125

CF01 Termination of patent right due to non-payment of annual fee