CN202363562U - Cavity filter, communication device and low pass filter - Google Patents
Cavity filter, communication device and low pass filter Download PDFInfo
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- CN202363562U CN202363562U CN 201120324814 CN201120324814U CN202363562U CN 202363562 U CN202363562 U CN 202363562U CN 201120324814 CN201120324814 CN 201120324814 CN 201120324814 U CN201120324814 U CN 201120324814U CN 202363562 U CN202363562 U CN 202363562U
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- low pass
- dielectric cover
- body structure
- filter
- convexity
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Abstract
The utility model discloses a cavity filter. An insulated medium sleeve is disposed between a low pass structure and a cavity hole. The insulated medium sleeve and the cavity hole are arranged in an interference fit manner. A projection is arranged on the outer surface of the insulated medium sleeve. According to the cavity filter, a communication device and a low pass filter, the projection arranged on the outer surface of the insulated medium sleeve allows the mating contact surface between the insulated medium sleeve and the cavity hole to be minimized, enables mating interference to be increased and enables the possibility of clearance fit to be minimized so that the low pass structure is relatively stable in position, and enables the friction between the insulated medium sleeve and the cavity hole to be reduced, thereby protecting the low pass structure from being damaged. The utility model also provides the communication device and the low pass filter.
Description
Technical field
The utility model relates to the communications field, is specifically related to cavity body filter, uses communication equipment and a kind of low pass filter of this 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 the base station, cavity body filter is used to select signal of communication, clutter or interference signal that the filtering communication signal frequency is outer.
In order to satisfy the filtering requirements of cavity body filter, also be provided with low pass filter in the part cavity body filter, low pass filter allows that low frequency signal passes through, and passes through but weaken the signal that frequency is higher than cut-off frequency.As depicted in figs. 1 and 2; Usually employed low pass filter comprises by a core conductor and the low pass body structure 101 formed to a plurality of capacitance disk of outer process along core conductor in the cavity body filter; Said capacitance disk is divided into a plurality of high impedance portions and a plurality of low-resistance parts to said core conductor; The similar sugarcoated haws shape of the shape of said low pass body structure 101; The low pass body structure is assemblied in the chamber hole 103 of cavity body filter; In order to prevent the low pass filter short circuit, dielectric cover 102 can be set to realize isolation between the two between low pass body structure and the chamber hole, low pass body structure 101 was installed in dielectric cover 102 and then constituted low pass filter in the chamber hole 103 this moment.Existing low pass body structure and chamber hole mounting structure are as shown in Figure 1.
Cooperation elasticity (magnitude of interference or the gap) degree of low pass body structure when assembling can suppress the far-end of cavity body filter, Insertion Loss, and the influence of intermodulation index is bigger.The low pass body structure is to realize through the wall thickness dimension of controlling the dielectric cover between itself and the chamber hole in the cooperation elasticity (magnitude of interference or clearence degree) in when assembling in the prior art.
In research and practice process to prior art, the inventor of the utility model is found to be the magnitude of interference requirement that reaches between low pass body structure and the chamber hole, and the wall thickness dimension that dielectric is overlapped requires just than higher.
1. if the tube wall of dielectric cover is thinner, then be combined with the gap between low pass body structure and the chamber hole, the bad control of filter index, it is poor that far-end suppresses, and Insertion Loss is big, and the intermodulation index is only.
2. if the tube wall of dielectric cover is thicker, then cooperate tension between low pass body structure and the chamber hole, both contact-making surfaces are big so, and sliding friction power is big during assembling, the assembling difficulty; Cause probably that also the low pass body structure fractures, initiation is opened circuit; Cooperate tension, also cause the dielectric cover to break probably, cause short circuit.
This shows that the quality of production of dielectric cover is had relatively high expectations, and causes cost also higher.
The utility model content
The utility model provides a kind of cavity body filter and has comprised the communication equipment of this kind cavity body filter, can
Problem with existing assembling difficulty between low pass body structure in the solution cavity body filter and the chamber hole.
The utility model provides a kind of cavity body filter; Comprise chamber hole and be arranged in the low pass body structure of chamber hole; Be provided with the dielectric cover between said low pass body structure and the chamber hole, said dielectric cover and said chamber hole interference fit, said dielectric cover outer surface is provided with convexity.
Said low pass body structure is by an above high impedance portion and the sugarcoated haws shape structure that above low-resistance parts is formed in parallel.
Said convexity can be the vertically continuous convexity of an end to the other end from dielectric cover outer surface.Said convexity also can be protruding continuously for ring-type.
Said convexity can also be a plurality of intermittent bosses.
Said dielectric cover can be heat-shrinkable T bush, and said heat-shrinkable T bush is contraction section-expansion segment structure with the integral body that its low pass body structure that is coated forms, and the expansion segment on the said heat-shrinkable T bush outer surface is provided with convexity.
Above-mentioned heat-shrinkable T bush is the polytetrafluoroethylene material.
Said dielectric cover also can be the stereoplasm tube body, and the integral body that said dielectric cover and said low pass body structure form is cylindrical structure.
The utility model also provides a kind of communication equipment, and said communication equipment comprises above-described cavity body filter.Said cavity body filter is duplexer, mixer, tower amplifier.
The utility model also provides a kind of low pass filter, comprises low pass body structure and the dielectric cover that coats said low pass body structure, and the outer surface of described dielectric cover is provided with convexity.
Cavity body filter that the utility model provided and communication equipment low pass filter; Reduce the cooperation contact-making surface between dielectric cover and the chamber hole through on dielectric cover outer surface, convexity being set; Both can strengthen matching allowance, reduce the possibility of matched in clearance, stable with the relative position that reaches the low pass body structure; Comprise that far-end inhibition, Insertion Loss, intermodulation index are reliable and stable thereby reach the cavity body filter achievement data, First Pass Yield is high; Because the assembling contact-making surface between dielectric cover and the chamber hole reduces, can reduce the frictional force between dielectric cover and the chamber hole again, thereby protection lowpass structures body is not damaged; The reduction of dielectric sleeve wall thickness control precision causes its cost to reduce in addition, assembly quality, and qualification rate and efficiency of assembling all are improved.
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; Obviously, the accompanying drawing in describing below only is some embodiment of the 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 part perspective view of cavity body filter in the prior art;
Fig. 2 is the cut-away section sketch map of cavity body filter in the prior art;
Fig. 3 is the part perspective view of the utility model embodiment one cavity body filter;
Fig. 4 is the profile of Fig. 3 in the utility model;
Fig. 5 is the phantom of the utility model embodiment two cavity body filters;
Fig. 6 is the phantom of the utility model embodiment three cavity body filters.
Embodiment
To combine the accompanying drawing among the utility model embodiment below, the technical scheme among the utility model embodiment is carried out clear, intactly description, 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; Profile like Fig. 3 and Fig. 3 is shown in Figure 4; Comprise chamber hole 203 and be arranged in the low pass body structure 201 of chamber hole 203; Be provided with dielectric cover 202 between said low pass body structure 201 and the chamber hole 203, said dielectric cover 202 and said chamber hole 203 interference fit, said dielectric overlaps 202 outer surfaces and is provided with protruding 204.
Be provided with protruding 204 on the outer surface of said dielectric cover 202; Said protruding 204 directly contact with said chamber hole 203; So just reduce the contact-making surface that cooperates between dielectric cover 202 and the chamber hole 203, both can strengthen matching allowance, reduced the possibility of matched in clearance; Relative position to reach low pass body structure 201 is stable, thereby it is reliable and stable to reach the cavity body filter achievement data; Because the assembling contact-making surface between dielectric cover 202 and the chamber hole 203 reduces, can reduce the frictional force between dielectric cover 202 and the chamber hole 203 again, thereby protection low pass body structure 201 is not damaged.
Said low pass body structure is the sugarcoated haws shape structure by an above high impedance portion and an above low-resistance parts parallel connection.Concrete; Said low pass body structure comprises by a core conductor with along a plurality of capacitance disk of core conductor to outer process and being formed in parallel; Said capacitance disk is divided into a plurality of high impedance portions and a plurality of low-resistance parts to said core conductor, the similar sugarcoated haws shape of the shape of said low pass body structure.
As shown in Figure 3, present embodiment protrusions 204 structures are for overlapping the vertically protruding continuously of an end to the other end from dielectric, and said convexity can be provided with many, does not constitute the restriction to the utility model.The convexity of this kind structure is prone to processing and is easy to be installed in the chamber hole.Described protruding 204 can reduce the contact-making surface between chamber hole and the dielectric cover.
The dielectric cover that coats said low pass body structure can be a heat-shrinkable T bush, is a kind of soft body, and said thermal shrinkable sleeve can be the polytetrafluoroethylene material, and the material of said heat-shrinkable T bush does not constitute the influence to the utility model.
Said dielectric cover also can be the hard body; When promptly assembling with the low pass body structure; Its shape does not receive the influence of low pass body structure; In such cases, said dielectric cover is a cylindrical structure with the formed integral body of low pass body structure, and the whole outer surface of said dielectric cover all contacts with chamber hole.
The material of said dielectric cover does not all constitute the restriction to the utility model.
The utility model embodiment also provides a kind of communication equipment, and said communication equipment comprises above-described any one cavity body filter.Said cavity body filter can be frequency-selecting equipment such as duplexer, mixer, tower amplifier.
The utility model embodiment also provides a kind of low pass filter, comprises low pass body structure and the dielectric cover that coats said low pass body structure, and the outer surface of described dielectric cover is provided with convexity.
Said low pass filter allows that low frequency signal passes through, and passes through but weaken the signal that frequency is higher than cut-off frequency.The function of its logical low frequency resistance high frequency realizes through the low pass body structure; Said low pass body structure comprises by a core conductor with along core conductor and forming to a plurality of capacitance disk of outer process; Said capacitance disk is divided into a plurality of high impedance portions and a plurality of low-resistance parts to said core conductor, the similar sugarcoated haws shape of the shape of said low pass body structure.The low pass body structure is installed in other communication equipments for example on the cavity body filter through the dielectric cover; Form low pass filter; Through on the outer surface of dielectric cover, convexity being set, said convexity can be vertically protruding continuously for many an of end to the other end from dielectric cover outer surface.
Embodiment two, a kind of cavity body filter; As shown in Figure 5; Comprise chamber hole 303 and be arranged in the low pass body structure 301 of chamber hole 303; Be provided with dielectric cover 302 between said low pass body structure 301 and the chamber hole 303, said dielectric cover 302 and said chamber hole 303 interference fit, said dielectric overlaps 302 outer surfaces and is provided with protruding 304.
Be provided with protruding 304 on the outer surface of said dielectric cover 302; Said protruding 304 directly contact with said chamber hole 303; So just reduce the contact-making surface that cooperates between dielectric cover 302 and the chamber hole 303, both can strengthen matching allowance, reduced the possibility of matched in clearance; Relative position to reach low pass body structure 301 is stable, thereby it is reliable and stable to reach the cavity body filter achievement data; Because the assembling contact-making surface between dielectric cover 302 and the chamber hole 303 reduces, can reduce the frictional force between dielectric cover 302 and the chamber hole 303 again, thereby protection low pass body structure 301 is not damaged.
Said low pass body structure is the sugarcoated haws shape structure by an above high impedance portion and an above low-resistance parts parallel connection.Concrete; Said low pass body structure comprises by a core conductor with along a plurality of capacitance disk of core conductor to outer process and being formed in parallel; Said capacitance disk is divided into a plurality of high impedance portions and a plurality of low-resistance parts to said core conductor, the similar sugarcoated haws shape of the shape of said low pass body structure.
As shown in Figure 5, the structure of the convexity of present embodiment is a ring-type convexity 304 continuously, and convexity can have many.Described protruding 304 can reduce the contact-making surface between chamber hole and the dielectric cover.
The dielectric cover that coats said low pass body structure can be a heat-shrinkable T bush; Be a kind of soft body; After being heated, heat-shrinkable T bush packs tightly the low pass body structure, and this moment, heat-shrinkable T bush and the formed integral body of low pass body structure were contraction section-expansion segment structure; Said expansion segment is the capacitance disk position of low pass body structure, and promptly be this section with chamber hole actual contact face this moment.Said thermal shrinkable sleeve can be the polytetrafluoroethylene material, and the material of said heat-shrinkable T bush does not constitute the influence to the utility model.
When the dielectric cover is soft body; The continuous convexity of said ring-type has at least a convexity to be arranged on the expansion segment of said heat-shrinkable T bush; The actual contact face that is said heat-shrinkable T bush and chamber hole should be provided with convexity at least, to reduce the contact area between heat-shrinkable T bush and the chamber hole.
Said dielectric cover also can be the hard body; When promptly assembling with the low pass body structure; Its shape does not receive the influence of low pass body structure; In such cases, said dielectric cover is a cylindrical structure with the formed integral body of low pass body structure, and the whole outer surface of said dielectric cover all contacts with chamber hole.
When dielectric cover during for the hard body, the outer surface of said dielectric cover is the actual contact face, and protruding position is unrestricted, can dielectric overlap outer surface the optional position convexity is set.
The material of said dielectric cover does not all constitute the restriction to the utility model.
The utility model embodiment also provides a kind of communication equipment, and said communication equipment comprises above-described any one cavity body filter.Said cavity filter can be frequency-selecting equipment such as duplexer, mixer, tower amplifier.
The utility model embodiment also provides a kind of low pass filter, comprises low pass body structure and the dielectric cover that coats said low pass body structure, and the outer surface of described dielectric cover is provided with convexity.
Said low pass filter allows that low frequency signal passes through, and passes through but weaken the signal that frequency is higher than cut-off frequency.The function of its logical low frequency resistance high frequency realizes through the low pass body structure; Said low pass body structure comprises by a core conductor with along core conductor and forming to a plurality of capacitance disk of outer process; Said capacitance disk is divided into a plurality of high impedance portions and a plurality of low-resistance parts to said core conductor, the similar sugarcoated haws shape of the shape of said low pass body structure.The low pass body structure is installed in other communication equipments for example on the cavity body filter through the dielectric cover, forms low pass filter, and through on the outer surface of dielectric cover, convexity being set, said convexity can be protruding continuously for many ring-types.
Embodiment three, a kind of cavity body filter; Shown in 6; Comprise chamber hole 403 and be arranged in the low pass body structure 401 of chamber hole 403; Be provided with dielectric cover 402 between said low pass body structure 401 and the chamber hole 403, said dielectric cover 402 and said chamber hole 403 interference fit, said dielectric overlaps 402 outer surfaces and is provided with protruding 404.
Be provided with protruding 404 on the outer surface of said dielectric cover 402; Said protruding 404 directly contact with said chamber hole 403; So just reduce the contact-making surface that cooperates between dielectric cover 402 and the chamber hole 403, both can strengthen matching allowance, reduced the possibility of matched in clearance; Relative position to reach low pass body structure 401 is stable, thereby it is reliable and stable to reach the cavity body filter achievement data; Because the assembling contact-making surface between dielectric cover 402 and the chamber hole 403 reduces, can reduce the frictional force between dielectric cover 402 and the chamber hole 403 again, thereby protection low pass body structure 401 is not damaged.
Said low pass body structure is the sugarcoated haws shape structure by an above high impedance portion and an above low-resistance parts parallel connection.Concrete; Said low pass body structure comprises by a core conductor with along a plurality of capacitance disk of core conductor to outer process and being formed in parallel; Said capacitance disk is divided into a plurality of high impedance portions and a plurality of low-resistance parts to said core conductor, the similar sugarcoated haws shape of the shape of said low pass body structure.
As shown in Figure 6, present embodiment protrusions 404 structures can be that discontinuous is protruding, and described convexity can be provided with a plurality of.Described protruding 404 can reduce the contact-making surface between chamber hole and the dielectric cover.
The dielectric cover that coats said low pass body structure can be a heat-shrinkable T bush; Be a kind of soft body; After being heated, heat-shrinkable T bush packs tightly the low pass body structure, and this moment, heat-shrinkable T bush and the formed integral body of low pass body structure were contraction section-expansion segment structure; Said expansion segment is the capacitance disk position of low pass body structure, and promptly be this section with chamber hole actual contact face this moment.Said thermal shrinkable sleeve can be the polytetrafluoroethylene material, and the material of said heat-shrinkable T bush does not constitute the influence to the utility model.
When the dielectric cover is soft body; Said discontinuous is raised on the rare expansion segment that is arranged on said heat-shrinkable T bush with raising; The actual contact face that is said heat-shrinkable T bush and chamber hole should be provided with convexity at least, to reduce the contact area between heat-shrinkable T bush and the chamber hole.
Said dielectric cover also can be the hard body; When promptly assembling with the low pass body structure; Its shape does not receive the influence of low pass body structure; In such cases, said dielectric cover is a cylindrical structure with the formed integral body of low pass body structure, and the whole outer surface of said dielectric cover all contacts with chamber hole.
When dielectric cover during for the hard body, the outer surface of said dielectric cover is the actual contact face, and protruding position is unrestricted, can dielectric overlap outer surface the optional position convexity is set.
The utility model embodiment also provides a kind of communication equipment, and said communication equipment comprises above-described any one cavity body filter.Said cavity body filter can be frequency-selecting equipment such as duplexer, mixer, tower amplifier.
The utility model embodiment also provides a kind of low pass filter, comprises low pass body structure and the dielectric cover that coats said low pass body structure, and the outer surface of described dielectric cover is provided with convexity.
Said low pass filter allows that low frequency signal passes through, and passes through but weaken the signal that frequency is higher than cut-off frequency.The function of its logical low frequency resistance high frequency realizes through the low pass body structure; Said low pass body structure comprises by a core conductor with along core conductor and forming to a plurality of capacitance disk of outer process; Said capacitance disk is divided into a plurality of high impedance portions and a plurality of low-resistance parts to said core conductor, the similar sugarcoated haws shape of the shape of said low pass body structure.The low pass body structure is installed in other communication equipments for example on the cavity body filter through the dielectric cover, forms low pass filter, and through on the outer surface of dielectric cover, convexity being set, said convexity can also be a plurality of intermittent bosses.
Above embodiment has carried out detailed introduction to cavity body filter, communication equipment and the low pass filter that the utility model provided, wherein:
Through being set on the outer surface that overlaps at dielectric, convexity reduces the cooperation contact-making surface between dielectric cover and the chamber hole; Both can strengthen matching allowance; Reduce the possibility of matched in clearance; Stable with the relative position that reaches the low pass body structure, comprise that far-end inhibition, Insertion Loss, intermodulation index are reliable and stable thereby reach the cavity body filter achievement data, First Pass Yield is high; Because the assembling contact-making surface between dielectric cover and the chamber hole reduces, can reduce the frictional force between dielectric cover and the chamber hole again, thereby protection low pass body structure is not damaged; The reduction of dielectric sleeve wall thickness control precision causes its cost to reduce in addition, assembly quality, and qualification rate and efficiency of assembling all are improved.
Used concrete example among this paper the principle and the execution mode of the utility model are set forth, the explanation of above embodiment just is used to help to understand the method and the core concept thereof of the utility model; Simultaneously, for one of ordinary skill in the art, according to the thought of the utility model, the part that on embodiment and range of application, all can change, in sum, this description should not be construed as the restriction to the utility model.
Claims (11)
1. cavity body filter; Comprise chamber hole and be arranged in the low pass body structure of chamber hole, it is characterized in that, be provided with the dielectric cover between said low pass body structure and the chamber hole; Said dielectric cover and said chamber hole interference fit, said dielectric cover outer surface is provided with convexity.
2. cavity body filter according to claim 1 is characterized in that, said low pass body structure is by an above high impedance portion and the sugarcoated haws shape structure that above low-resistance parts is formed in parallel.
3. cavity body filter according to claim 1 is characterized in that, said convexity is the vertically continuous convexity of overlapping an end to the other end on the outer surface from dielectric.
4. cavity body filter according to claim 1 is characterized in that, said convexity is that ring-type is protruding continuously.
5. cavity body filter according to claim 1 is characterized in that, said convexity is a plurality of intermittent bosses.
6. according to claim 4 or 5 any described cavity body filters; It is characterized in that; Said dielectric cover is heat-shrinkable T bush; Said heat-shrinkable T bush is contraction section-expansion segment structure with the integral body that its low pass body structure that is coated forms, and the expansion segment on the said heat-shrinkable T bush outer surface is provided with convexity.
7. cavity body filter according to claim 6 is characterized in that, said heat-shrinkable T bush is the polytetrafluoroethylene material.
8. according to any described cavity body filter of claim 1-5, it is characterized in that said dielectric cover is the hard body, the integral body that said dielectric cover and said low pass body structure form is cylindrical structure.
9. a communication equipment is characterized in that, said communication equipment comprises any described cavity body filter of claim 1-8.
10. communication equipment according to claim 9, said cavity body filter are duplexer, mixer, tower amplifier.
11. a low pass filter is characterized in that, comprises low pass body structure and the dielectric cover that coats said low pass body structure, the outer surface of described dielectric cover is provided with convexity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120324814 CN202363562U (en) | 2011-08-31 | 2011-08-31 | Cavity filter, communication device and low pass filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120324814 CN202363562U (en) | 2011-08-31 | 2011-08-31 | Cavity filter, communication device and low pass filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202363562U true CN202363562U (en) | 2012-08-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120324814 Expired - Fee Related CN202363562U (en) | 2011-08-31 | 2011-08-31 | Cavity filter, communication device and low pass filter |
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| Country | Link |
|---|---|
| CN (1) | CN202363562U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102361108A (en) * | 2011-08-31 | 2012-02-22 | 深圳市大富科技股份有限公司 | Cavity filter, communication equipment and low pass filter |
| CN105990628A (en) * | 2015-02-09 | 2016-10-05 | 深圳振华富电子有限公司 | Tubular filter |
| CN106953147A (en) * | 2017-05-03 | 2017-07-14 | 深圳市国人射频通信有限公司 | A kind of new lowpass structures for cavity body filter |
-
2011
- 2011-08-31 CN CN 201120324814 patent/CN202363562U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102361108A (en) * | 2011-08-31 | 2012-02-22 | 深圳市大富科技股份有限公司 | Cavity filter, communication equipment and low pass filter |
| CN105990628A (en) * | 2015-02-09 | 2016-10-05 | 深圳振华富电子有限公司 | Tubular filter |
| CN105990628B (en) * | 2015-02-09 | 2019-03-08 | 深圳振华富电子有限公司 | A kind of tubulose filter |
| CN106953147A (en) * | 2017-05-03 | 2017-07-14 | 深圳市国人射频通信有限公司 | A kind of new lowpass structures for cavity body filter |
| CN106953147B (en) * | 2017-05-03 | 2019-11-05 | 深圳市国人射频通信有限公司 | A kind of novel lowpass structures for cavity body filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120801 Termination date: 20160831 |
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| CF01 | Termination of patent right due to non-payment of annual fee |