CN205406685U - Transverse magnetic (TM) mold dielectric filter - Google Patents
Transverse magnetic (TM) mold dielectric filter Download PDFInfo
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- CN205406685U CN205406685U CN201620035642.XU CN201620035642U CN205406685U CN 205406685 U CN205406685 U CN 205406685U CN 201620035642 U CN201620035642 U CN 201620035642U CN 205406685 U CN205406685 U CN 205406685U
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- resonance post
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Abstract
The utility model discloses a transverse magnetic (TM) mold dielectric filter. This transverse magnetic (TM) mold dielectric filter includes: the cavity, the shielding apron seals the cavity is in order to form the resonant cavity, medium resonance post is located in the resonant cavity, its high summary is greater than the height of cavity, the mounting plate is located shielding apron top, and the gasket that can deform, locate shielding apron with between the mounting plate, shielding apron including can not deform the district with set up in the district outlying district of easily deforming of can not deforming, the both ends of medium resonance post face press from both sides tightly in can not deform the district with between the cavity, the gasket that can deform press from both sides tightly in easy deformation district with between the mounting plate. Through above -mentioned embodiment, can guarantee to shield apron and medium resonance post up end in close contact with, avoid appearing the line contact, and when the temperature variation, the gasket that can deform can continue to compress tightly the shielding and lap the good contact of guaranteeing shielding apron bottom and medium resonance post.
Description
Technical field
This utility model relates to resonator and wave filter technology field, particularly relates to a kind of TM mould dielectric filter.
Background technology
Dielectric filter is to utilize that the low-loss of ceramic medium material, high-k, frequency-temperature coefficient and thermal coefficient of expansion are little, can bear the features such as high power designs and produces.Under normal circumstances, TM mode filter needs two ends and the cavity close contact of medium, but, due to manufacturing tolerance, cause that common mounting means does not reach the two ends of medium and the requirement of cavity close contact, and, when variations in temperature is bigger, ceramic dielectric resonant column can cause its upper surface and metallic cavity loose contact due to the effect of expanding with heat and contract with cold, thus causing Q-value reduction, bad stability, the problem such as cannot producing in batches.
Fig. 1 shows the schematic diagram of TM mould dielectric filter 100 in prior art.The primary structure of this dielectric filter 100 includes, filter cavity 110, upper cover plate 122, lower cover 124, distance piece 123, dielectric resonance post 130, metal installation base 132, regulates the screw rod 160 of resonant frequency.Dielectric resonance post 130 is made for TM medium ceramic material, is overplated with one layer of high conductivity metal such as silver or copper etc. in upper and lower both ends of the surface by special process, and lower surface is welded in metal installation base 132, with good contact bottom filter cavity 110.Upper cover plate 122 is assembled together by screw with lower cover 124 and cavity 110, lower cover 124 is relatively thin, lower cover 124 can apply because of distance piece 123 after total part assembles assembling pressure and compression, thus with dielectric resonance post 130 upper surface good contact.Wave filter is when in practical process, each parts are deformed with environment temperature change, and distance piece 123 pressure applied makes lower cover and medium keep good contact.
In the research process to prior art, utility model people of the present utility model finds, above-mentioned prior art has following two aspect problems: on the one hand, owing to lower cover 124 is relatively thin, can be deformed after being subject to distance piece pressure, contacted from face with the contact area of dielectric resonance post 130 and become linear contact lay, cause loose contact, have a strong impact on the performance indications of wave filter.
Therefore, it is badly in need of providing one to solve medium two ends and cavity close contact, and under temperature variations, ensures the dielectric resonator that the contact of dielectric resonance post upper surface is good.
Utility model content
This utility model provides a kind of TM mould dielectric filter for solving above-mentioned technical problem, shielding cover board and the close contact of dielectric resonance post upper surface can be ensured, avoid the occurrence of linear contact lay, and when variations in temperature, can may proceed to compress shielding cover board and ensure bottom shielding cover board the good contact with dielectric resonance post by deformed gasket.
For solving above-mentioned technical problem, this utility model provides a kind of TM mould dielectric filter, including: cavity；Shielding cover board, closes described cavity to form resonator cavity；Dielectric resonance post, is located in described resonator cavity, and its height is slightly larger than the height of described cavity；Binding, is located at above described shielding cover board；And can deformed gasket, be located between described shielding cover board and described binding；Wherein, described shielding cover board include can not deformation district and be arranged at described can not peripheral easy deformation district of deformation district, the both ends of the surface of described dielectric resonance post are clamped in and described between deformation district and described cavity, described can not be clamped between described easy deformation district and described binding by deformed gasket.
Further, described can not being towards described binding and be projected and formed in the boss on described shielding cover board in deformation district, described easy deformation district is formed at the groove on described shielding cover board towards described binding and depression.
Further, described boss is cylindrical shape, described groove is ringwise, described can deformed gasket ringwise, the radius of described boss is more than or equal to the external diameter of described dielectric resonance post, the outer radius of described groove and the difference of inside radius more than or equal to described can the difference of outer radius and inside radius of deformed gasket, described can be arranged in described groove by deformed gasket.
Further, described can deformed gasket be cyclic spring sheet, and described cyclic spring sheet outer rim contacts with described binding, and the center portion thereof position concave downward contacts with described shielding cover board.
Further, described can the thickness of deformed gasket more than the degree of depth of described groove.
Further, the thickness of described binding is less than or equal to the thickness of described boss.
Further, described binding center offers through hole, the radius of described through hole more than the radius of described boss and less than described can the radius of deformed gasket, offering tuning bolt hole on described boss, a tuning screw sequentially passes through the through hole of described binding and the tuning bolt hole of described boss and then inserts in described dielectric resonance post.
Further, the height of described dielectric resonance post is more than the height 0.1mm of described cavity, and the thickness of described boss is be more than or equal to 2mm.
Further, described cavity bottom is provided with the positioning boss in cylindrical shape, and the radius of described positioning boss is less than or equal to the external diameter of described medium resonant rod, and described dielectric resonance post end face utilizes described positioning boss to position when abutting to described cavity bottom.
Further, described shielding cover board adopts any material in gold, silver, copper, aluminum to prepare, and the surface of described shielding cover board is additionally provided with coat, and described coat adopts any material in gold, silver, copper to prepare, and described can adopt metal or nonmetal prepare by deformed gasket.
The TM mould dielectric filter of this utility model embodiment, by the height of dielectric resonance post is set to be a bit larger tham the height of cavity, and arrange on shielding cover board can not deformation district and can not arrange easy deformation district in periphery, deformation district at this, can be clamped between easy deformation district and binding by deformed gasket, being clamped in by dielectric resonance post can not between deformation district and cavity, can deform upon so that shielding cover board and dielectric resonance post good contact by deformed gasket, and, owing to the height of dielectric resonance post is slightly above the height of cavity, when shielding cover board compresses, it can not contact with dielectric resonance post bottom deformation district, owing to deformation can not be not susceptible to thus ensureing shielding cover board and the close contact of dielectric resonance post in deformation district, by can shielding cover board be compressed deformed gasket, the good contact between shielding cover board and dielectric resonance post can be further ensured that.And when variations in temperature, by can the deformation of deformed gasket, it is possible to ensure the good contact between shielding cover board and dielectric resonance post.
Accompanying drawing explanation
Fig. 1 is the cross-sectional view of prior art TM mould dielectric filter.
Fig. 2 is the cross-sectional view of this utility model embodiment TM mould dielectric filter.
Fig. 3 is the decomposition texture schematic diagram of the dielectric filter of TM mould shown in Fig. 2.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out clear, complete description, it is clear that described embodiment is only a part of embodiment of the present utility model, rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of this utility model protection.
Referring to figs. 2 and 3, this utility model provides a kind of TM mould dielectric filter 200, and this TM mould dielectric filter 200 includes: cavity 210；Seal cavity 210 to form the shielding cover board 230 of resonator cavity；It is positioned at the dielectric resonance post 220 within cavity 210；It is positioned at the binding 240 above shielding cover board 230；Between shielding cover board 230 and binding 240 can deformed gasket 250.For example, multiple nuts 212 can be passed through be sequentially inserted into binding 240, shielding cover board 230 and cavity 210 and then three be tightly fastened.
Wherein, shielding cover board 230 include can not deformation district and be arranged at can not peripheral easy deformation district of deformation district, the both ends of the surface of dielectric resonance post 220 are clamped in respectively and between deformation district and cavity, can not be clamped between easy deformation district and binding 240 by deformed gasket 250.The height of this dielectric resonance post 220 is slightly above the height of cavity 210, as being set above 0.1mm.
The problem that when problem being in close contact compared to the both ends of the surface that prior art cannot solve dielectric resonance post 220 and cavity 210 simultaneously and variations in temperature, dielectric resonance post 220 is in close contact with cavity 210.In this utility model embodiment, on the one hand, utilize binding 240 compression can deformed gasket 250, shielding cover board 230 is deformed upon in easy deformation district 232, shielding cover board 230 and the close contact of dielectric resonance post 220 upper surface, on the other hand, shielding cover board 230 is have with dielectric resonance post 220 contact site can not deformation district 231, can ensure that shielding cover board 230 contacts with the good face of dielectric resonance post 220 upper surface, it is to avoid form linear contact lay；Further, even if under temperature variations, by can the change of deformed gasket 250, it is ensured that shielding cover board 230 contacts with the good face of dielectric resonance post 220.
In a detailed description of the invention, can not deformation district be that shielding cover board is positioned at the thickness relatively die of boss 231 place and is not susceptible to deformation towards binding 240 and the boss 231 that is projected and formed on shielding cover board 230；Easy deformation district is the groove 232 being formed on shielding cover board 230 towards binding 240 and depression, and it is less relatively thin therefore be easier to deform upon that shielding cover board 230 is positioned at groove 232 place thickness.For easy to make, boss 231 and groove 232 are integrated with shielding cover board 230.Wherein, dielectric resonance post 220 upper surface abuts the bottom (namely away from the one side of binding 240) to boss 231.Certainly, if not minding the bottom surface out-of-flatness of shielding cover board 230 when boss 231 is arranged bottom cavity 210 to be likely to the impact that the electric property on this TM mould dielectric filter 200 produces, this boss 231 also can be projected and formed on shielding cover board 230 towards cavity 210.
Preferably, the radius of boss 231 slightly larger than the outer radius of dielectric resonance post 220 so that dielectric resonance post 220 can realize face with shielding cover board 230 fully contacts.The height of boss 231 more than 2mm, thus formed thicker can not deformation region, it is ensured that the complete comprehensive engagement in upper surface of shielding cover board 230 and dielectric resonance post 220, thus avoiding linear contact lay.Further, boss 231 is set to thicker being also beneficial to and offers tuning bolt hole (sign) to assemble tuning screw 260, the radio frequency parameter of this TM mould dielectric filter 200 is finely tuned by being arranged to of this tuning screw 260, to meet multiple different user demand.
Preferably, shielding cover board 230 offers groove 232 place, is being subject to binding 240 and can after deformed gasket 250 pressure, and shielding cover board 230 produces elastic deformation in this position, and then makes the boss 231 of shielding cover board 230 contact with dielectric resonance post 220 holding surface all the time.Be in the consideration of clamping, can the thickness of deformed gasket 250 more than the degree of depth of groove 232.
Preferably, this boss 231 generally may be selected to be cylindrical shape boss, this groove 232 generally may be selected to be annular groove, adapt with it, can the generally optional annular of deformed gasket 250 can deformed gasket, the outer radius of this annular groove and the difference of inside radius more than can the difference of outer radius and inside radius of deformed gasket 250 radius, and then facilitate the installation can deformed gasket 250.
In a preferred embodiment, can deformed gasket 250 be cyclic spring sheet, cyclic spring sheet outer rim contacts with binding 240, cyclic spring sheet centre concave downward contacts with shielding cover board 230, there is elastic deformation in groove 232 region making shielding cover board 230, is in close contact with dielectric resonance post 220 bottom boss 231.Certainly, those skilled in the art are readily apparent that, above-mentioned can deformed gasket 250 can be any object that can be filled upper groove 232 region by compression, and its material can make metal or plastics etc. nonmetal.
In a preferred embodiment, binding 240 has through hole 241 in centre, the radius of through hole 241 should be greater than the radius of boss 231 and less than can the external diameter of deformed gasket 250, owing to dielectric resonance post 220 is slightly above cavity 210 degree of depth, binding 240 to be only downwardly applied to power, shielding cover board 230 can be made to compress dielectric resonance post 220, and the thickness of this binding 240 is equal to or less than the boss 231 place thickness of shielding cover board 230.By offering through hole 241 on binding 240, and offering tuning bolt hole on boss 231, aforesaid tuning screw 260 sequentially passes through the through hole 241 of binding 240 and the tuning bolt hole of boss 231 and then inserts dielectric resonance post 220 inside.Tuning screw 260 can pass through a locking nut 261 away from dielectric resonance post 220 end face being arranged at boss 231 and be locked, it is, of course, also possible to arrange between this locking nut 261 and boss 231 packing ring 262 with disperse locking nut 261 be locked tuning screw 260 time stress.
In a preferred embodiment, metalized is done in dielectric resonance post 220 lower surface, in order to ensure efficiently stable contacting of assembling with what guarantee medium, having positioning boss 214 in the bottom of cavity 210 for limiting the position of dielectric resonance post 220, the radius of positioning boss 214 is less than or equal to the internal diameter of dielectric resonance post 220.When dielectric resonance post 220 is mounted to cavity 210, only dielectric resonance post 220 1 end shield need to be set to this positioning boss 214 and can be accurately positioned, install simple and convenient, and dielectric resonance post 220 position in follow-up use procedure is not susceptible to change, it is possible to the related electric making this TM mould dielectric filter 200 is stable and reliable for performance.
In above-described embodiment, shielding cover board 230 adopts any material in gold, silver, copper, aluminum to prepare, and the surface of shielding cover board 230 is additionally provided with coat (not shown), and coat adopts any material in gold, silver, copper to prepare.
nullThe TM mould dielectric filter 200 of this utility model embodiment，By the height of dielectric resonance post 220 is set to be a bit larger tham the height of cavity 210，And arrange on shielding cover board 230 can not deformation district and can not arrange easy deformation district in periphery, deformation district at this，Can be clamped between easy deformation district and binding 240 by deformed gasket 250，Being clamped in by dielectric resonance post 220 can not between deformation district and cavity 210，Can deform upon so that shielding cover board 230 and dielectric resonance post 220 good contact by deformed gasket 250，And，Owing to the height of dielectric resonance post 220 is slightly above the height of cavity 210，When shielding cover board 230 compresses, it can not contact with dielectric resonance post 220 bottom deformation district，Owing to deformation can not be not susceptible to thus ensureing that shielding cover board 230 and dielectric resonance post 220 are in close contact in deformation district，By can shielding cover board 230 be compressed deformed gasket 250，The good contact between shielding cover board 230 and dielectric resonance post 220 can be further ensured that.And when variations in temperature, by can the deformation of deformed gasket 250, it is possible to ensure the good contact between shielding cover board 230 and dielectric resonance post 220.Meanwhile, said structure is adopted, it is easy to realize the requirements such as the high q-factor of this TM mould dielectric filter 200 and high intermodulation.
These are only embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every equivalent structure utilizing this utility model description and accompanying drawing content to make or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical fields, all in like manner include in scope of patent protection of the present utility model.
Claims (10)
1. a TM mould dielectric filter, it is characterised in that including:
Cavity；
Shielding cover board, closes described cavity to form resonator cavity；
Dielectric resonance post, is located in described resonator cavity, and its height is slightly larger than the height of described cavity；
Binding, is located at above described shielding cover board；
And can deformed gasket, be located between described shielding cover board and described binding；
Wherein, described shielding cover board include can not deformation district and be arranged at described can not peripheral easy deformation district of deformation district, the both ends of the surface of described dielectric resonance post are clamped in and described between deformation district and described cavity, described can not be clamped between described easy deformation district and described binding by deformed gasket.
2. TM mould dielectric filter according to claim 1, it is characterised in that:
Described can not being towards described binding and be projected and formed in the boss on described shielding cover board in deformation district, described easy deformation district is formed at the groove on described shielding cover board towards described binding and depression.
3. TM mould dielectric filter according to claim 2, it is characterised in that:
Described boss is cylindrical shape, described groove is ringwise, described can deformed gasket ringwise, the radius of described boss is more than or equal to the external diameter of described dielectric resonance post, the outer radius of described groove and the difference of inside radius more than or equal to described can the difference of outer radius and inside radius of deformed gasket, described can be arranged in described groove by deformed gasket.
4. TM mould dielectric filter according to claim 3, it is characterised in that:
Described can deformed gasket be cyclic spring sheet, and described cyclic spring sheet outer rim contacts with described binding, and the center portion thereof position concave downward contacts with described shielding cover board.
5. TM mould dielectric filter according to claim 3, it is characterised in that:
Described can the thickness of deformed gasket more than the degree of depth of described groove.
6. TM mould dielectric filter according to claim 2, it is characterised in that:
The thickness of described binding is less than or equal to the thickness of described boss.
7. TM mould dielectric filter according to claim 2, it is characterised in that:
Described binding center offers through hole, the radius of described through hole more than the radius of described boss and less than described can the radius of deformed gasket, offering tuning bolt hole on described boss, a tuning screw sequentially passes through the through hole of described binding and the tuning bolt hole of described boss and then inserts in described dielectric resonance post.
8. TM mould dielectric filter according to claim 2, it is characterised in that:
The height of described dielectric resonance post is more than the height 0.1mm of described cavity, and the thickness of described boss is be more than or equal to 2mm.
9. TM mould dielectric filter according to claim 1, it is characterised in that:
Described cavity bottom is provided with the positioning boss in cylindrical shape, and the radius of described positioning boss is less than or equal to the external diameter of described medium resonant rod, and described dielectric resonance post end face utilizes described positioning boss to position when abutting to described cavity bottom.
10. TM mould dielectric filter according to claim 1, it is characterised in that:
Described shielding cover board adopts any material in gold, silver, copper, aluminum to prepare, and the surface of described shielding cover board is additionally provided with coat, and described coat adopts any material in gold, silver, copper to prepare, and described can adopt metal or nonmetal prepare by deformed gasket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620035642.XU CN205406685U (en) | 2016-01-13 | 2016-01-13 | Transverse magnetic (TM) mold dielectric filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620035642.XU CN205406685U (en) | 2016-01-13 | 2016-01-13 | Transverse magnetic (TM) mold dielectric filter |
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| Publication Number | Publication Date |
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| CN205406685U true CN205406685U (en) | 2016-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620035642.XU Active CN205406685U (en) | 2016-01-13 | 2016-01-13 | Transverse magnetic (TM) mold dielectric filter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105529512A (en) * | 2016-01-13 | 2016-04-27 | 广东通宇通讯股份有限公司 | TM-mode dielectric filter |
| CN107978833A (en) * | 2017-12-11 | 2018-05-01 | 四川九鼎智远知识产权运营有限公司 | A kind of TM moulds resonant oscillator |
| CN109994807A (en) * | 2019-04-29 | 2019-07-09 | 深圳市国人射频通信有限公司 | A kind of double short filters of medium |
-
2016
- 2016-01-13 CN CN201620035642.XU patent/CN205406685U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105529512A (en) * | 2016-01-13 | 2016-04-27 | 广东通宇通讯股份有限公司 | TM-mode dielectric filter |
| CN107978833A (en) * | 2017-12-11 | 2018-05-01 | 四川九鼎智远知识产权运营有限公司 | A kind of TM moulds resonant oscillator |
| CN109994807A (en) * | 2019-04-29 | 2019-07-09 | 深圳市国人射频通信有限公司 | A kind of double short filters of medium |
| CN109994807B (en) * | 2019-04-29 | 2023-09-26 | 深圳国人科技股份有限公司 | Dielectric double short filter |
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