CN204464424U - Cavity body filter and the resonant column for cavity body filter - Google Patents
Cavity body filter and the resonant column for cavity body filter Download PDFInfo
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- CN204464424U CN204464424U CN201420856971.1U CN201420856971U CN204464424U CN 204464424 U CN204464424 U CN 204464424U CN 201420856971 U CN201420856971 U CN 201420856971U CN 204464424 U CN204464424 U CN 204464424U
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Abstract
The utility model provides the cavity body filter of a kind of resonant column and cavity close contact, this cavity body filter comprises cavity and cover plate, cover plate capping cavity forms resonant cavity, the resonant column of tubular is provided with in resonant cavity, resonant column trip bolt is fixed on the diapire of cavity, and the end face that resonant column contacts with the diapire of cavity is provided with the face fit structure of the diapire embedding cavity.
Description
Technical field
The present invention relates to domain of communication equipment, particularly relate to a kind of cavity body filter and the resonant column for cavity body filter.
Background technology
Cavity body filter is widely used in the communications field as a kind of frequency selection device, especially field of radio frequency communication.In a base station, filter for selecting signal of communication, the clutter outside filtering communication signal frequency or interference signal.
As shown in Figure 1, existing cavity body filter generally comprises cavity 110 and cover plate 120, and cover plate 110 capping cavity 120 forms resonant cavity, is provided with the resonant column 130 of tubular in resonant cavity, cavity is provided with installation base 140, and the humorous trip bolt 150 of resonant column is fixed on installation base 140.When the processing of the contact-making surface between resonant column 130 and installation base 140 meets planarity requirements completely, between resonant column and installation base, can compact siro spinning technology be formed, electric current is conducted smoothly.But when there is tolerance in the processing of contact-making surface between resonant column and installation base, minim gap will be there is between resonant column and installation base, i.e. loose contact between resonant column and installation base, electric current is conducted occur having some setbacks, cause filter Insertion Loss index and intermodulation index not to meet the demands.
Summary of the invention
The purpose of this utility model is to provide a kind of resonant column and cavity can the cavity body filter of close contact and the resonant column for cavity body filter.
The cavity body filter that the utility model provides, comprise cavity and cover plate, cover plate capping cavity forms resonant cavity, the resonant column of tubular is provided with in resonant cavity, resonant column trip bolt is fixed on the diapire of cavity, and the end face that resonant column contacts with the diapire of cavity is provided with the face fit structure of the diapire embedding cavity.
Preferably, face fit structure is circular protrusion.
Preferably, the cross section of circular protrusion is triangle, trapezoidal, semicircle or circular.
Preferably, the central authorities of resonant column are provided with through hole, the inwall of through hole is provided with the positive stop lug boss radially inwardly stretched out, described in described positive stop lug boss, through hole is divided into tuned window and installing hole vertically, face fit structure is arranged on the open end of installing hole, and cover plate is provided with the tuning screw stretched in tuned window.
Preferably, the diapire of cavity is provided with integrated installation base with it, and installation base is stepped, comprises reference column and support column, and reference column inserts in the installing hole of resonant column, the open end close contact of support column and installing hole.
Preferably, resonant column central authorities are provided with the tuned window of bottom lock, and face fit structure is arranged on the outer face of tuned window blind end, and cover plate is provided with the tuning screw stretched in tuned window.
Preferably, the diapire of cavity is provided with integrated installation base with it, the outer face close contact of installation base and tuned window blind end.
The resonant column for cavity body filter that the utility model provides is tubular, is fixed on the diapire of cavity with trip bolt, and the end face that resonant column contacts with the diapire of cavity is provided with the face fit structure of the diapire embedding cavity.
Preferably, face fit structure is circular protrusion.
Preferably, the cross section of circular protrusion is triangle, trapezoidal, semicircle or circular.
The cavity body filter that the utility model provides, the end face that resonant column contacts with the diapire of cavity is provided with the face fit structure embedding cavity diapire, just close contact can be kept between such resonant column and cavity diapire, make electric current conduction can be smooth and easy, corresponding filter Insertion Loss index and intermodulation index also can meet user's requirement.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 cavity body filter profile of the prior art;
The first cavity body filter profile that Fig. 2 the utility model provides;
The enlarged drawing of circled shown in Fig. 3 Fig. 2;
The profile of the first resonant column of Fig. 4;
The second cavity body filter profile that Fig. 5 the utility model provides;
The enlarged drawing of circled shown in Fig. 6 Fig. 5;
The profile of Fig. 7 the second resonant column.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Embodiment one
As shown in Fig. 2,3 and 4, the cavity body filter that the present embodiment provides comprises cavity 210 and cover plate 220, cover plate 220 capping cavity 210 forms resonant cavity, the resonant column 230 of tubular is provided with in resonant cavity, resonant column 230 trip bolt is fixed on the diapire of cavity 210, and the end face that resonant column 230 contacts with the diapire of cavity 210 is provided with the face fit structure of the diapire embedding cavity 210.
This face fit structure is circular protrusion 260, and the cross section of circular protrusion 260 is triangle, trapezoidal, semicircle or circular.The number of turns of circular protrusion 260 is arranged according to specific circumstances, and the end face that the resonant column 230 that the present embodiment provides contacts with cavity 210 diapire is provided with 3 loop projections 260.
The central authorities of resonant column 230 are provided with through hole, the inwall of through hole is provided with the positive stop lug boss radially inwardly stretched out, this through hole is divided into tuned window 231 and installing hole 232 by positive stop lug boss 233 vertically, face fit structure is arranged on the open end of installing hole 232, and cover plate 210 is provided with the tuning screw 270 stretched in tuned window 231.
The diapire of cavity 210 is provided with integrated installation base 240 with it, installation base 240 is stepped, comprise reference column 241 and support column 242, reference column 241 inserts in the installing hole 232 of resonant column 230, the open end close contact of support column 242 and installing hole 232.Specifically, positive stop lug boss 223 is provided with via hole, and installation base 240 is provided with screw hole, and resonant column 230 is with being fixed on installation base 240 through the trip bolt 250 of via hole and screw hole successively.By the axial force that trip bolt 250 applies, the face fit structure on resonant column 230 is embedded in installation base 240.
Embodiment two
As shown in Fig. 5,6 and 7, the cavity body filter that the present embodiment provides comprises cavity 310 and cover plate 320, cover plate 320 capping cavity 310 forms resonant cavity, the resonant column 330 of tubular is provided with in resonant cavity, resonant column 330 trip bolt is fixed on the diapire of cavity 310, and the end face that resonant column 330 contacts with the diapire of cavity 310 is provided with the face fit structure of the diapire embedding cavity 310.
This face fit structure is circular protrusion 360, and the cross section of circular protrusion 360 is triangle, trapezoidal, semicircle or circular.The number of turns of circular protrusion 360 is arranged according to specific circumstances, and the end face of the resonant column 330 that the present embodiment provides is provided with 3 loop projections 360.
Resonant column 330 central authorities are provided with the tuned window 331 of bottom lock, face fit structure is arranged on the outer face of tuned window 331 blind end, tuned window 331 openend is provided with the capacitive load dish 332 radially stretched out, and cover plate 310 is provided with the tuning screw 370 stretched in tuned window 331.
The diapire of cavity 310 is provided with integrated installation base 340 with it, the outer face close contact of installation base 340 and tuned window 331 blind end.Specifically, the end face of described tuned window 331 blind end is provided with via hole, and installation base 340 is provided with screw hole, and resonant column 330 is with being fixed on installation base 340 through the trip bolt 350 of via hole and screw hole successively.By the axial force that trip bolt 350 applies, the face fit structure on resonant column 330 is embedded in installation base 340.
Embodiment three
As shown in Figure 4, the resonant column for cavity body filter that the present embodiment provides is tubular, is fixed on the diapire of cavity 210 with trip bolt 250, and the end face that resonant column 230 contacts with the diapire of cavity 210 is provided with the face fit structure of the diapire embedding cavity 210.
This face fit structure is circular protrusion 260, and the cross section of circular protrusion 260 is triangle, trapezoidal, semicircle or circular.
The central authorities of resonant column 230 are provided with through hole, and the inwall of through hole is provided with the positive stop lug boss 233 radially inwardly stretched out, and this through hole is divided into tuned window 231 and installing hole 232 by positive stop lug boss 233 vertically, and face fit structure is arranged on the open end of installing hole 232.
Embodiment four
As shown in Figure 7, the resonant column 330 for cavity body filter that the present embodiment provides is in tubular, be fixed on the diapire of cavity 310 with trip bolt 350, the end face that resonant column 330 contacts with the diapire of cavity 310 is provided with the face fit structure of the diapire embedding cavity 310.
This face fit structure is circular protrusion 360, and the cross section of circular protrusion 360 is triangle, trapezoidal, semicircle or circular.
Resonant column 330 central authorities are provided with the tuned window 331 of bottom lock, and face fit structure is arranged on the outer face of tuned window 331 blind end, and tuned window 331 openend is provided with the capacitive load dish 332 radially stretched out.
Adopt the cavity body filter that the present embodiment provides, the end face that resonant column contacts with the diapire of cavity is provided with the face fit structure embedding cavity diapire, just close contact can be kept between such resonant column and cavity diapire, make electric current conduction can be smooth and easy, corresponding filter Insertion Loss index and intermodulation index also can meet user's requirement.
Apply specific case herein to set forth principle of the present utility model and execution mode, the explanation of above embodiment just understands method of the present utility model and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.
Claims (10)
1. a cavity body filter, it is characterized in that, comprise cavity and cover plate, cavity described in described cover plate capping forms resonant cavity, the resonant column of tubular is provided with in resonant cavity, described resonant column trip bolt is fixed on the diapire of cavity, and the end face that described resonant column contacts with the diapire of cavity is provided with the face fit structure of the diapire embedding cavity.
2. cavity body filter according to claim 1, is characterized in that, described fit structure is circular protrusion.
3. cavity body filter according to claim 2, is characterized in that, the cross section of described circular protrusion is triangle, trapezoidal, semicircle or circular.
4. the cavity body filter according to claims 1 to 3 any one, it is characterized in that, the central authorities of described resonant column are provided with through hole, the inwall of through hole is provided with the positive stop lug boss radially inwardly stretched out, described through hole is divided into tuned window and installing hole by described positive stop lug boss vertically, described fit structure is arranged on the open end of installing hole, and cover plate is provided with the tuning screw stretched in tuned window.
5. cavity body filter according to claim 4, it is characterized in that, the diapire of cavity is provided with integrated installation base with it, installation base is stepped, comprise reference column and support column, described reference column inserts in the installing hole of resonant column, the open end close contact of described support column and installing hole.
6. the cavity body filter according to claims 1 to 3 any one, is characterized in that, resonant column central authorities are provided with the tuned window of bottom lock, and face fit structure arranges the outer face of tuned window blind end, and cover plate is provided with the tuning screw stretched in tuned window.
7. cavity body filter according to claim 6, is characterized in that, the diapire of cavity is provided with integrated installation base with it, the outer face close contact of described installation base and tuned window blind end.
8. for a resonant column for cavity body filter, it is characterized in that, described resonant column is tubular, is fixed on the diapire of cavity with trip bolt, and the end face that described resonant column contacts with the diapire of cavity is provided with the face fit structure of the diapire embedding cavity.
9. resonant column according to claim 8, is characterized in that, described fit structure is circular protrusion.
10. resonant column according to claim 9, is characterized in that, the cross section of described circular protrusion is triangle, trapezoidal, semicircle or circular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420856971.1U CN204464424U (en) | 2014-12-30 | 2014-12-30 | Cavity body filter and the resonant column for cavity body filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420856971.1U CN204464424U (en) | 2014-12-30 | 2014-12-30 | Cavity body filter and the resonant column for cavity body filter |
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| Publication Number | Publication Date |
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| CN204464424U true CN204464424U (en) | 2015-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420856971.1U Active CN204464424U (en) | 2014-12-30 | 2014-12-30 | Cavity body filter and the resonant column for cavity body filter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022518360A (en) * | 2018-12-28 | 2022-03-15 | 華為技術有限公司 | TM mode filter and manufacturing method of TM mode filter |
-
2014
- 2014-12-30 CN CN201420856971.1U patent/CN204464424U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022518360A (en) * | 2018-12-28 | 2022-03-15 | 華為技術有限公司 | TM mode filter and manufacturing method of TM mode filter |
| JP7266685B2 (en) | 2018-12-28 | 2023-04-28 | 華為技術有限公司 | TM mode filter and method for manufacturing TM mode filter |
| US11990661B2 (en) | 2018-12-28 | 2024-05-21 | Huawei Technologies Co., Ltd. | TM mode filter and method for manufacturing TM mode filter |
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