CN202050043U - Cavity filter and communication equipment - Google Patents
Cavity filter and communication equipment Download PDFInfo
- Publication number
- CN202050043U CN202050043U CN2011200488981U CN201120048898U CN202050043U CN 202050043 U CN202050043 U CN 202050043U CN 2011200488981 U CN2011200488981 U CN 2011200488981U CN 201120048898 U CN201120048898 U CN 201120048898U CN 202050043 U CN202050043 U CN 202050043U
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- erecting bed
- resonant rod
- cavity body
- body filter
- face
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Abstract
The utility model provides a cavity filter and communication equipment. The cavity filter comprises a resonant rod and a cavity, an installation platform with the top surface outer diameter smaller than the bottom surface outer diameter is arranged on the bottom surface of the cavity, and the resonant rod is fixed at the top surface of the installation platform by a screw, therefore, the resonant rod and the installation platform thereof can be tightly compressed by a screw cap of the screw so as not to generate similar or non contact situation between the resonant rod and the installation platform, thus solving the problems of plugging damage and intermodulation of the cavity filter due to poor contact between the resonant rod and the installation platform.
Description
Technical field
The utility model relates to the communications field, is specifically related to a kind of cavity body filter and communication equipment.
Background technology
Filter is widely used in the communications field as a kind of frequency selection device, especially field of radio frequency communication.In the base station, filter is used to select signal of communication, clutter or interference signal that the filtering communication signal frequency is outer.
At present, in mobile communication system, generally use cavity body filter to come that antenna emission and the signal that receives are carried out frequency and select.Cavity body filter generally includes cavity and resonant rod, and cavity is provided with a plurality of cavitys, contains a resonant rod in each cavity.Be fixed on resonant rod on the cavity, as shown in Figure 1, cavity bottom 102 is provided with erecting bed 103, with screw 104 resonant rod 101 is fixed on the erecting bed 103.
But, in research and practice process to prior art, inventor of the present utility model finds, because the nut diameter of screw is less than the diameter of resonant rod erecting bed, after screw lock, produce between resonant rod and the erecting bed and seemingly contact non-contacting situation, influence the differential loss and the intermodulation of cavity body filter.
The utility model content
The utility model embodiment provides a kind of cavity body filter and communication equipment, can make more reliable that resonant rod contacts with erecting bed, improves the index of cavity body filter.
A kind of cavity body filter that the utility model embodiment provides, comprise resonant rod and cavity, described inside cavity bottom surface is provided with the fixedly erecting bed of resonant rod, the bottom surface of described erecting bed links to each other with the inside cavity bottom surface, described resonant rod is fixed on the end face of described erecting bed, and the end face external diameter of described erecting bed is less than or equal to described erecting bed bottom surface external diameter.
Preferably, there is the through hole that passes for screw described resonant rod bottom surface, and the end face of described erecting bed is provided with screwed hole, with screw described resonant rod is fixed on the described erecting bed.
Preferably, described screw is the screw that has nut, and described erecting bed end face external diameter is not more than the external diameter of described nut, and described nut is followed closely the bottom surface of resonant rod on described erecting bed end face.
Preferably, described erecting bed end face external diameter is less than described resonant rod bottom surface external diameter.
Preferably, the longitudinal cross-section of described erecting bed is " protruding " shape.
Preferably, the longitudinal cross-section of described erecting bed is trapezoidal.
Preferably, described erecting bed is cylinder.
Preferably, described erecting bed end face is provided with groove, with the contact area of minimizing resonant rod bottom surface and erecting bed end face, thus increase pressure between the two.
A kind of communication equipment comprises above-mentioned described cavity body filter, and described cavity body filter is located at the signal receipts/Power Generation Road part of described communication equipment, is used for signal is selected.
Described radio frequency communication devices is cavity body filter, duplexer or mixer.
Cavity body filter that the utility model embodiment is provided and the communication equipment that has comprised the cavity body filter that embodiment provides, by the erecting bed that an end face external diameter is less than or equal to the bottom surface external diameter is set at the cavity inner bottom surface, with screw resonant rod is fixed on the erecting bed end face, the nut external diameter of screw is not more than erecting bed end face external diameter, like this, screw nut just can compress the erecting bed of resonant rod and resonant rod, can not allow resonant rod produce and seemingly contact non-contacting situation, thereby solve the problem of existing structure influence Insertion Loss and intermodulation with erecting bed.
Description of drawings
In order to be illustrated more clearly in the technical scheme among 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.
Fig. 1 is the internal structure schematic diagram of the cavity body filter of prior art;
Fig. 2 is the internal structure schematic diagram of a kind of embodiment of the utility model cavity body filter.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
Embodiment one, a kind of cavity body filter, the part-structure schematic diagram as shown in Figure 2, comprise resonant rod 201 and cavity, described inside cavity bottom surface 202 is provided with the fixedly erecting bed 203 of resonant rod, the bottom surface 301 of described erecting bed links to each other with inside cavity bottom surface 202, described resonant rod 201 is fixed on the end face 302 of described erecting bed, and end face 302 external diameters of described erecting bed are less than or equal to described erecting bed bottom surface 301 external diameters.
There is the through hole that passes for screw described resonant rod bottom surface, and the end face of described erecting bed is provided with screwed hole, with screw described resonant rod is fixed on the described erecting bed.Described resonant rod can be the resonant rod of bottom surface band sunken inside structure, also can be flat stretching resonant rod.
Described screw 204 is the screws that have nut 205, described nut 205 is followed closely the bottom surface of resonant rod on described erecting bed end face 302, described erecting bed end face 302 external diameters can be equal to or less than the external diameter of described nut 205, like this, nut just can all compress resonant rod with the part that erecting bed end face 302 contacts, and just can not have the phenomenon of loose contact between resonant rod and the erecting bed end face 302.
Described erecting bed end face 302 external diameters are less than described resonant rod bottom surface external diameter, and the benefit of doing like this is to reduce the contact-making surface of resonant rod and erecting bed, to increase both pressure, to satisfy the intensity of pressure requirement between resonatron and the erecting bed.
In order to satisfy the required different indexs of different cavity body filters, described erecting bed can have multiple structure.The utility model embodiment provides the structure of several erecting beds.
Described erecting bed can be that the upper end is provided with the boss 206 that the longitudinal cross-section is " protruding " shape, and the end face of described boss 206 is described erecting bed end faces, and the end face external diameter of described boss 206 is less than or equal to the external diameter of described nut 205.Described boss can be a cylinder, and described cylindrical external diameter is less than or equal to the external diameter of nut; Described boss also can be that the cross section is trapezoidal cylinder, and the end face of described cylinder is the end face of erecting bed.The erecting bed that this kind has a boss is easy to processing, and can make between resonant rod and the erecting bed contact good.
Described erecting bed can also be that the longitudinal cross-section is trapezoidal cylinder, and the place face at the bottom of described trapezoidal two at the bottom of less is the end face of described erecting bed.
Described erecting bed can also be a cylinder, and the erecting bed bottom surface external diameter of this kind erecting bed and end face external diameter and nut external diameter three equate that perhaps erecting bed bottom surface external diameter and end face external diameter are less than the nut external diameter.
Described erecting bed end face can also be provided with groove, with the contact area of minimizing resonant rod bottom surface and erecting bed end face, thus the further pressure that increases between the two.
Described erecting bed and described cavity can be that integrated formed structure or described erecting bed are riveted on the described inside cavity bottom surface by the riveted joint mode.
Embodiment two, a kind of communication equipment comprise any one cavity body filter among the embodiment one, and described cavity body filter is located at the transceiver circuit part of described communication equipment, is used for signal is selected.Described radio frequency communication devices can be cavity body filter, duplexer or mixer.
More than cavity body filter that the utility model embodiment is provided and the communication equipment that comprises the cavity body filter described in the embodiment be described in detail, wherein:
Cavity body filter and communication equipment that the utility model embodiment is provided, by the erecting bed that an end face external diameter is less than or equal to the bottom surface external diameter is set at the cavity inner bottom surface, with screw resonant rod is fixed on the erecting bed end face, the nut external diameter of screw is not more than erecting bed end face external diameter, like this, screw nut just can compress the erecting bed of resonant rod and resonant rod, can not allow resonant rod produce and seemingly contact non-contacting situation, thereby solve the problem of existing structure influence Insertion Loss and intermodulation with erecting bed.
Used specific case herein principle of the present utility model and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present utility model, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.
Claims (10)
1. cavity body filter, comprise resonant rod and cavity, it is characterized in that, described inside cavity bottom surface is provided with the fixedly erecting bed of resonant rod, the bottom surface of described erecting bed links to each other with the inside cavity bottom surface, described resonant rod is fixed on the end face of described erecting bed, and the end face external diameter of described erecting bed is less than or equal to described erecting bed bottom surface external diameter.
2. cavity body filter according to claim 1 is characterized in that, there is the through hole that passes for screw described resonant rod bottom surface, and the end face of described erecting bed is provided with screwed hole, with screw described resonant rod is fixed on the described erecting bed.
3. cavity body filter according to claim 2 is characterized in that, described screw is the screw that has nut, and described erecting bed end face external diameter is not more than the external diameter of described nut, and described nut is followed closely the bottom surface of resonant rod on described erecting bed end face.
4. cavity body filter according to claim 3 is characterized in that, described erecting bed end face external diameter is less than described resonant rod bottom surface external diameter.
5. cavity body filter according to claim 4 is characterized in that, the longitudinal cross-section of described erecting bed is " protruding " shape.
6. cavity body filter according to claim 4 is characterized in that the longitudinal cross-section of described erecting bed is trapezoidal.
7. cavity body filter according to claim 4 is characterized in that described erecting bed is a cylinder.
8. according to any described cavity body filter of claim 1-7, it is characterized in that described erecting bed end face is provided with groove, with the contact area of minimizing resonant rod bottom surface and erecting bed end face, thus increase pressure between the two.
9. a communication equipment is characterized in that, comprises any described cavity body filter of claim 1-8, and described cavity body filter is located at the signal receipts/Power Generation Road part of described communication equipment, is used for signal is selected.
10. communication equipment according to claim 9 is characterized in that: described radio frequency communication devices is cavity body filter, duplexer or mixer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200488981U CN202050043U (en) | 2011-02-25 | 2011-02-25 | Cavity filter and communication equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200488981U CN202050043U (en) | 2011-02-25 | 2011-02-25 | Cavity filter and communication equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202050043U true CN202050043U (en) | 2011-11-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200488981U Expired - Lifetime CN202050043U (en) | 2011-02-25 | 2011-02-25 | Cavity filter and communication equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202050043U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102709629A (en) * | 2012-02-08 | 2012-10-03 | 武汉凡谷电子技术股份有限公司 | Mid frequency range high-power cavity filter |
| CN102832429A (en) * | 2012-09-13 | 2012-12-19 | 深圳市大富科技股份有限公司 | Coaxial cavity filter |
| CN107615579A (en) * | 2015-05-20 | 2018-01-19 | 华为技术有限公司 | Wave filter and electromagnetic equipment |
| CN110474143A (en) * | 2019-09-16 | 2019-11-19 | 苏州诺泰信通讯有限公司 | A kind of resonant column mounting structure suitable for low intermodulation products |
| CN111384537A (en) * | 2018-12-29 | 2020-07-07 | 深圳市大富科技股份有限公司 | Cavity filter and radio frequency communication equipment |
-
2011
- 2011-02-25 CN CN2011200488981U patent/CN202050043U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102709629A (en) * | 2012-02-08 | 2012-10-03 | 武汉凡谷电子技术股份有限公司 | Mid frequency range high-power cavity filter |
| CN102832429A (en) * | 2012-09-13 | 2012-12-19 | 深圳市大富科技股份有限公司 | Coaxial cavity filter |
| CN102832429B (en) * | 2012-09-13 | 2015-01-14 | 深圳市大富科技股份有限公司 | Coaxial cavity filter |
| CN107615579A (en) * | 2015-05-20 | 2018-01-19 | 华为技术有限公司 | Wave filter and electromagnetic equipment |
| CN107615579B (en) * | 2015-05-20 | 2020-02-21 | 华为技术有限公司 | Filter and electromagnetic device |
| CN111384537A (en) * | 2018-12-29 | 2020-07-07 | 深圳市大富科技股份有限公司 | Cavity filter and radio frequency communication equipment |
| CN110474143A (en) * | 2019-09-16 | 2019-11-19 | 苏州诺泰信通讯有限公司 | A kind of resonant column mounting structure suitable for low intermodulation products |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 518104, Guangdong, Shenzhen province Baoan District manhole Street oyster road manhole Industrial Company Third Industrial Zone A1, A2, A3 101 and 2 layers, A4 Patentee after: Shenzhen Tat Fook Technology Co., Ltd. Address before: 518108 Bao'an District, Shenzhen City, Guangdong Province, Shiyan Town, love group with the rich industrial area A \ B Dong Patentee before: Shenzhen Tat Fook Technology Co., Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20111123 |
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| CX01 | Expiry of patent term |