CN201946724U - Medium filter, mounting structure of medium resonant pole and communication equipment - Google Patents
Medium filter, mounting structure of medium resonant pole and communication equipment Download PDFInfo
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- CN201946724U CN201946724U CN 201020646080 CN201020646080U CN201946724U CN 201946724 U CN201946724 U CN 201946724U CN 201020646080 CN201020646080 CN 201020646080 CN 201020646080 U CN201020646080 U CN 201020646080U CN 201946724 U CN201946724 U CN 201946724U
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- cover plate
- resonant rod
- medium resonant
- dielectric filter
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Abstract
The embodiment of the utility model provides a medium filter and a mounting structure of a medium resonant pole thereof. A nonmetal support member which is used for gap control is arranged between the medium resonant pole and a cover plate and then the gap can be controlled in a controllable range when the temperature changes so that the problem of unstable radio frequency index of the medium filter due to great change of the gap between the medium resonant pole and the cover plate during the temperature change is solved, and the stability of the medium filter is greatly improved.
Description
Technical field
The utility model relates to the dielectric filter technical field, is specifically related to dielectric filter, medium resonant rod mounting structure and communication equipment.
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 the base station, filter is used to select signal of communication, clutter or interference signal that the filtering communication signal frequency is outer.
Cavity body filter generally comprises three classes, and the first kind is a coaxial cavity filter, and second class is a dielectric filter, and the 3rd class is a waveguide filter.
Existing dielectric filter has various modes, the dielectric filter of wherein horizontal magnetic (TM) pattern is in order to guarantee its magnetic field model and parameter index, need the upper surface of medium resonant rod and the gap of resonant cavity end face to remain on controlled scope, if it is excessive that the gap changes, will have a strong impact on radio-frequency (RF) index.As shown in Figure 1, being the structural representation of prior art dielectric filter, is that example describes with a single chamber only among the figure:
Dielectric filter of the prior art comprises: cavity 110, cover plate 120 and medium resonant rod 130, the lower surface of medium resonant rod lower end 130 lower surface resonant cavity welds together, medium resonant rod upper surface resonant cavity end face (cover plate bottom surface) leaves gap h1, but because the thermal coefficient of expansion between medium resonant rod 130 and the metallic cavity 110 differs bigger, in case temperature raises, the height of metallic cavity 110 increases bigger, and the increase of medium resonant rod height is less, the gap of medium resonant rod upper surface resonant cavity end face (cover plate bottom surface) increases to the h2 (not shown), has had a strong impact on radio-frequency (RF) index.
Summary of the invention
The technical problem that the utility model solves provides dielectric filter, medium resonant rod mounting structure and communication equipment, can improve the stability indicator of dielectric filter, makes that the mounting structure of dielectric resonator is more reliable.
A kind of dielectric filter that the utility model embodiment provides, comprise: cavity, cover plate and be installed on medium resonant rod in the cavity, the described cavity of described cover plate capping forms resonant cavity, it is characterized in that, be provided with the non-metallic support that is used for control gap between described medium resonant rod and the cover plate.
A kind of medium resonant rod mounting structure that the utility model embodiment provides, comprise: cavity, cover plate and be installed on medium resonant rod in the cavity, the described cavity of described cover plate capping forms resonant cavity, it is characterized in that, be provided with the non-metallic support that is used for control gap between described medium resonant rod and the cover plate.
A kind of communication equipment comprises above-mentioned dielectric filter, and described dielectric filter is located at the transceiver circuit part of described communication equipment, is used for signal frequency is selected.
The dielectric filter that the utility model embodiment provides and the mounting structure of medium resonant rod thereof, between medium resonant rod and cover plate, be provided with the non-metallic support that is used for control gap, make when temperature changes, gap between medium resonant rod and the cover plate is in controlled scope, when having solved owing to variations in temperature, gap between medium resonant rod and the cover plate changes the excessive problem that causes dielectric filter radio-frequency (RF) index shakiness, improves the stability of dielectric filter greatly.
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 structural representation of prior art dielectric filter;
Fig. 2 is the structural representation of the utility model embodiment one dielectric 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.
The present utility model people finds in to the practice of prior art and research process, in order to guarantee the parameter of TM mould dielectric filter, when between medium resonant rod and the resonant cavity surface and imprecision contact, but maintenance certain clearance, as long as this gap is less than certain value, can guarantee that equally dielectric filter works under the TM pattern,, then can further guarantee dielectric filter radio-frequency (RF) index parameter in very among a small circle if gap length changes simultaneously.
Therefore, the present utility model people provides increases nonmetal distance piece between medium resonant rod and cover plate, realize the controlled of gap by nonmetal distance piece, and then guaranteed dielectric filter radio-frequency (RF) index parameter.
Embodiment one, a kind of dielectric filter, structural representation (is that example describes with a single chamber only among the figure as shown in Figure 2, concrete accompanying drawing structure does not constitute restriction of the present utility model), comprise: cavity 210, cover plate 220 and be installed on medium resonant rod 230 in the cavity 210, the described cavity 210 of described cover plate 220 cappings forms resonant cavity, is provided with the non-metallic support 240 that is used for control gap between described medium resonant rod 230 and the cover plate 220.When cover plate being carried out the material selection, described cover plate can select to have certain flexible metal material, can certainly be on the basis of the existing aluminium sheet cover plate that adopts usually, suitably the thickness that reduces cover plate is realized its spring function, selection those skilled in the art of concrete cover plate materials can select according to general knowledge, do not constitute restriction of the present utility model.After medium resonant rod assembles, described cover plate by described strutting piece jack-up deformation is taken place with the medium resonant rod correspondence position, form the projection of arc.
When specific implementation, during the dielectric filter assembling, the height H 1 at non-metallic support top is slightly larger than the height H 2 of resonant cavity end face, and described cover plate and medium resonant rod correspondence position by described strutting piece jack-up deformation are taken place, and form the projection of arc.Certainly use non-metallic support can also take other frame modes to realize that concrete implementation does not constitute restriction of the present utility model cover plate jack-up.
For example: can concave station be set in the cover plate position relative with strutting piece, concave station is used for strutting piece is positioned, under this structure under the pattern, then need the height H 1 at non-metallic support top to be slightly larger than the height of concave station bottom surface on the cover plate, cover plate jack-up is formed projection to realize non-metallic support.
When temperature rises, housing depth raises (in this example, because the medium resonant rod expansion rate is subjected to variations in temperature less, therefore main consideration cavity is subjected to Temperature Influence), the deformation of cover plate diminishes, the radian of described arc-shaped protrusions diminishes, and described arc-shaped protrusions tip position descends and forms being the covering that housing depth raises, and makes gap H between described resonant rod and the described cover plate in controlled range.When specifically carrying out Design of Filter, also can design when temperature rises to the maximum temperature of permission, housing depth rises and to make that elastic pressure between the non-metallic support cavity is 0 critical value, also can when rising to the maximum temperature of permission, temperature still keep certain elastic pressure between the non-metallic support cavity.
When temperature descends, housing depth descends (in this example, because the medium resonant rod expansion rate is subjected to variations in temperature less, therefore main consideration cavity is subjected to Temperature Influence), it is big that cover plate deformation becomes, and housing depth reduces, by the elasticity of cover plate, and the non-metallic support interval action, make gap H (greater than the thickness of non-metallic support) between described resonant rod and the described cover plate in controlled range.When carrying out cavity design, also can change the cross section size of metallic supports simultaneously, under the control different temperatures, the radian of arc-shaped protrusions.
When specific design, described non-metallic support can be designed to toroidal, described non-metallic support has the middle part through hole that the tuning screw that is used for dielectric filter passes.
For better implementation structure location, the diameter of section of described non-metallic support can also be designed to be slightly larger than the medium resonant rod diameter of section, the contact jaw of described non-metallic support and medium resonant rod is provided with medium resonant rod is carried out the spacing groove of circumference.
Be appreciated that, among the utility model embodiment, the material of described non-metallic support can be materials such as polytetrafluoroethylene (PTFE), according to the needs of product design, for consistency and elasticity can also be selected other non-metallic materials such as bakelite (phenolic plastics), high-strength rubber etc.
The dielectric filter that the utility model embodiment one provides is provided with the non-metallic support that is used for control gap between medium resonant rod and cover plate, make when temperature changes by strutting piece, gap between medium resonant rod and the cover plate is in controlled scope, when having solved owing to variations in temperature, gap between medium resonant rod and the cover plate changes the excessive problem that causes dielectric filter radio-frequency (RF) index shakiness, improves the stability of dielectric filter greatly.
Embodiment two, a kind of medium resonant rod mounting structure, comprise: cavity, cover plate and be installed on medium resonant rod in the cavity, the described cavity of described cover plate capping forms resonant cavity, is provided with the non-metallic support that is used for control gap between described medium resonant rod and the cover plate.When specific implementation, can have elasticity by described cover plate, after the dielectric filter assembling, under the normal temperature, the height at non-metallic support top is slightly larger than the height of resonant cavity end face, and described cover plate and medium resonant rod correspondence position by described strutting piece jack-up deformation are taken place, and forms the projection of arc.
The diameter of section of described non-metallic support is slightly larger than the medium resonant rod diameter of section, and the contact jaw of described non-metallic support and medium resonant rod is provided with medium resonant rod is carried out the spacing groove of circumference.
Embodiment three, a kind of communication equipment comprise above-mentioned dielectric filter, and described dielectric filter is located at the transceiver circuit part of described communication equipment, are used for signal frequency is selected.
Concrete, described communication equipment can also be application class communication equipments such as base station, tower amplifier for communication equipments such as duplexer, single multiplexer, splitter or mixers.
More than dielectric filter, medium resonant rod mounting structure and communication equipment that the utility model embodiment is provided be described in detail, wherein:
The dielectric filter that the utility model embodiment provides and the mounting structure of medium resonant rod thereof, between medium resonant rod and cover plate, be provided with the non-metallic support that is used for control gap, make when temperature changes, gap between medium resonant rod and the cover plate that is to say in controlled scope, no matter normal temperature, high temperature, low temperature is all because the position-limiting action of strutting piece remains in the scope that can control the gap between medium resonant rod and the cover plate.When having solved owing to variations in temperature, the gap between medium resonant rod and the cover plate changes the excessive problem that causes dielectric filter radio-frequency (RF) index shakiness, improves the stability of dielectric filter greatly.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 (11)
1. dielectric filter, comprise: cavity, cover plate and be installed on medium resonant rod in the cavity, the described cavity of described cover plate capping forms resonant cavity, it is characterized in that, is provided with the non-metallic support that is used for control gap between described medium resonant rod and the cover plate.
2. dielectric filter as claimed in claim 1 is characterized in that described cover plate has elasticity, and described cover plate and medium resonant rod correspondence position by described strutting piece jack-up deformation are taken place, and forms the projection of arc.
3. dielectric filter as claimed in claim 2, it is characterized in that, when temperature rises, described housing depth raises, the deformation of cover plate diminishes, the radian of described arc-shaped protrusions diminishes, and described arc-shaped protrusions tip position descends and forms the covering that housing depth is raise, and makes gap between described resonant rod and the described cover plate in controlled range.
4. as any described dielectric filter of claim 1 to 3, it is characterized in that described non-metallic support is a toroidal, described non-metallic support has the middle part through hole that the tuning screw that is used for dielectric filter passes.
5. as any described dielectric filter of claim 1 to 3, it is characterized in that, the diameter of section of described non-metallic support is slightly larger than the medium resonant rod diameter of section, and the contact jaw of described non-metallic support and medium resonant rod is provided with medium resonant rod is carried out the spacing groove of circumference.
6. as any described dielectric filter of claim 1 to 3, it is characterized in that the material of described non-metallic support is a polytetrafluoroethylene PTFE.
7. medium resonant rod mounting structure, comprise: cavity, cover plate and be installed on medium resonant rod in the cavity, the described cavity of described cover plate capping forms resonant cavity, it is characterized in that, is provided with the non-metallic support that is used for control gap between described medium resonant rod and the cover plate.
8. medium resonant rod mounting structure as claimed in claim 7, it is characterized in that, described cover plate has elasticity, after the dielectric filter assembling, under the normal temperature, the height at non-metallic support top is slightly larger than the height of resonant cavity end face, and described cover plate and medium resonant rod correspondence position by described strutting piece jack-up deformation are taken place, and forms the projection of arc.
9. as claim 7 or 8 described medium resonant rod mounting structures, it is characterized in that, the diameter of section of described non-metallic support is slightly larger than the medium resonant rod diameter of section, and the contact jaw of described non-metallic support and medium resonant rod is provided with medium resonant rod is carried out the spacing groove of circumference.
10. a communication equipment comprises any described dielectric filter of claim 1 to 6, and described dielectric filter is located at the transceiver circuit part of described communication equipment, is used for signal frequency is selected.
11. communication equipment as claimed in claim 10 is characterized in that, communication equipment is duplexer, single multiplexer, splitter or mixer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020646080 CN201946724U (en) | 2010-12-06 | 2010-12-06 | Medium filter, mounting structure of medium resonant pole and communication equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020646080 CN201946724U (en) | 2010-12-06 | 2010-12-06 | Medium filter, mounting structure of medium resonant pole and communication equipment |
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| Publication Number | Publication Date |
|---|---|
| CN201946724U true CN201946724U (en) | 2011-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201020646080 Expired - Lifetime CN201946724U (en) | 2010-12-06 | 2010-12-06 | Medium filter, mounting structure of medium resonant pole and communication equipment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103531869A (en) * | 2012-07-03 | 2014-01-22 | 罗森伯格（上海）通信技术有限公司 | TM mold dielectric filter |
| CN104347919A (en) * | 2013-08-08 | 2015-02-11 | 北京飞卡科技有限公司 | Temperature compensation device and temperature compensation method for microwave filter |
| CN110088978A (en) * | 2016-12-27 | 2019-08-02 | 华为技术有限公司 | Resonator and communication device |
-
2010
- 2010-12-06 CN CN 201020646080 patent/CN201946724U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103531869A (en) * | 2012-07-03 | 2014-01-22 | 罗森伯格（上海）通信技术有限公司 | TM mold dielectric filter |
| CN103531869B (en) * | 2012-07-03 | 2017-11-24 | 罗森伯格（上海）通信技术有限公司 | A kind of TM moulds dielectric filter |
| CN104347919A (en) * | 2013-08-08 | 2015-02-11 | 北京飞卡科技有限公司 | Temperature compensation device and temperature compensation method for microwave filter |
| CN110088978A (en) * | 2016-12-27 | 2019-08-02 | 华为技术有限公司 | Resonator and communication device |
| US10840577B2 (en) | 2016-12-27 | 2020-11-17 | Huawei Technologies Co., Ltd. | Resonator and communications apparatus |
| CN110088978B (en) * | 2016-12-27 | 2021-01-29 | 华为技术有限公司 | Resonator and communication device |
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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 Guangdong city of Shenzhen province Baoan District alqun Shiyan road with rich industrial area 1-2 building Patentee before: Shenzhen Tat Fook Technology Co., Ltd. |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20110824 Effective date of abandoning: 20130904 |
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| RGAV | Abandon patent right to avoid regrant |