CN104953206B - A kind of coaxial cavity filter and its medium filling method - Google Patents
A kind of coaxial cavity filter and its medium filling method Download PDFInfo
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- CN104953206B CN104953206B CN201510351192.5A CN201510351192A CN104953206B CN 104953206 B CN104953206 B CN 104953206B CN 201510351192 A CN201510351192 A CN 201510351192A CN 104953206 B CN104953206 B CN 104953206B
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- coaxial cavity
- dielectric
- resonating conductor
- circuit cylinder
- hollow circuit
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Abstract
The invention discloses a kind of coaxial cavity filter and its medium filling method, including coaxial cavity, resonating conductor, cover plate, tuning screw and dielectric cap, the coaxial cavity is internally provided with resonating conductor；The cover plate is covered at the top of the coaxial cavity；The resonating conductor lower end is connected with coaxial cavity bottom；The dielectric cap is installed between resonating conductor upper end and cover plate, and the tuning screw is screwed into hollow circuit cylinder from the upper end of the hollow circuit cylinder of the dielectric cap, the hollow circuit cylinder is located at the inside of the resonating conductor so that the tuning screw is separated with resonating conductor by the hollow circuit cylinder.The present invention realizes the lifting of low pressure power capacity in the case where not increasing wave filter volume；While solving wave filter low pressure discharge, the power capacity of vacuum micro discharge is also improved.With miniaturization, insertion loss is low, low cost and other advantages, is widely used in the system such as satellite navigation and remote measurement remote sensing.
Description
Technical field
The present invention relates to filter medium filling technique field, especially a kind of coaxial cavity filter and its Filled Dielectrics
Method.
Background technology
The working condition of the Microwave emission wave filter of aerospace model TT＆C system application is typically required and can born from normal pressure
To the process of vacuum environment change, in order to prevent the generation of low pressure and vacuum discharge, using various methods and techniques, so do
Result be exactly the volume of emission filter and quality will increase than ground Frequent Filters it is many.
The electrical insulation capability of air is good under normal conditions, and when air pressure drops to hundreds of pas, air is easily breakdown, from
And gas discharge occurs.
The content of the invention
The technical problem to be solved in the present invention is the low pressure discharge for how solving the problems, such as coaxial cavity filter, is carried with this
High generic coaxial cavity body filter low pressure state power capacity.
In order to solve this technical problem, the invention provides a kind of medium for not increasing coaxial cavity filter volume to fill out
Fill technology.
The present invention is achieved through the following technical solutions：
A kind of coaxial cavity filter, including coaxial cavity, resonating conductor, cover plate, tuning screw and dielectric cap, wherein,
The coaxial cavity is internally provided with the resonating conductor；
The cover plate is covered at the top of the coaxial cavity；
The resonating conductor lower end is connected with the coaxial cavity bottom；
The dielectric cap is installed between resonating conductor upper end and the cover plate, and the tuning screw is from the medium
The upper end of the hollow circuit cylinder of cap is screwed into the hollow circuit cylinder, and the hollow circuit cylinder is located at the inside of the resonating conductor so that institute
Tuning screw is stated to be separated by the hollow circuit cylinder with resonating conductor.
Further, in addition to dielectric posts, the dielectric posts are the space in the hollow circuit cylinder to be filled up.
Preferably, the coaxial cavity is square chamber or cylindrical cavity.
Invention additionally provides a kind of medium filling method of coaxial cavity filter, the medium filling method are specific
Comprise the following steps：
S1：The cavity filter for not carrying out Filled Dielectrics is debugged, its electrical property is met wave filter technology index
It is required that；
S2：Filter cover board is opened, the dielectric cap is installed to the resonating conductor upper end of each coaxial cavity of wave filter,
Refill upper cover plate so that, the dielectric cap is enclosed on resonating conductor upper end, and the hollow circuit cylinder is located at the interior of the resonating conductor
Portion so that the tuning screw is separated with resonating conductor by the hollow circuit cylinder；
S3：Resonance regulation is carried out by adjusting tuning screw, until resonant frequency reaches requirement, into step S4；
S4：Filter cover board is opened, the hollow cylindrical portion of the dielectric cap in each coaxial cavity is filled with dielectric posts,
Medium column length corresponds to the tuning screw head according to cavity filter and determined to resonating conductor distance from bottom；
S5：Resonance regulation is carried out by adjusting tuning screw, until resonant frequency reaches requirement.
Further, the dielectric substance is polytetrafluoroethylene (PTFE), expandable polystyrene and rigid ceramic heat-barrier material
Any one in MPT35.
Further, the dielectric substance is expandable polystyrene, when being filled using dielectric substance, directly
Foaming is connect, fills up whole filter internal spaces.
Further, the dielectric substance is expandable polystyrene, and first carrying out foaming using frock forms institute
The part of shape is needed, when being filled using dielectric substance, is filled using the part.
Compared with prior art, beneficial effects of the present invention are as follows：
1. in the case where not increasing wave filter volume, the lifting of low pressure power capacity is realized；
2. while solving wave filter low pressure discharge, the power capacity of vacuum micro discharge is also improved；
3. having good versatility and good portability, setting for the similar unit product of aerospace model can apply to
Meter exploitation, reduces the construction cycle of unit, and meets the reliability demand constantly lifted.
Brief description of the drawings
Shown in Fig. 1 is square coaxial cavity simulation architecture figure in the prior art；
Shown in Fig. 2 is PTFE medium of embodiment of the present invention cap and dielectric posts；
Shown in Fig. 3 is the coaxial cavity after filled media material of the embodiment of the present invention.
【Primary symbols explanation】
1 resonating conductor
2 cover plates
3 tuning screws
4 dielectric caps
5 dielectric posts
6 hollow circuit cylinders
Embodiment
Below with reference to the accompanying drawing of the present invention, clear, complete description is carried out to the technical scheme in the embodiment of the present invention
And discussion, it is clear that as described herein is only a part of example of the present invention, is not whole examples, based on the present invention
In embodiment, the every other implementation that those of ordinary skill in the art are obtained on the premise of creative work is not made
Example, belongs to protection scope of the present invention.
As Figure 1-3, a kind of coaxial cavity filter, including coaxial cavity, resonating conductor 1, cover plate 2, tuning screw 3
With dielectric cap 4, wherein, the coaxial cavity is internally provided with the resonating conductor 1；The cover plate 2 covers the coaxial cavity
Top；The lower end of resonating conductor 1 is connected with the coaxial cavity bottom；The dielectric cap 4 is installed on the resonating conductor 1
Between end and the cover plate 2 (dead slot around dielectric cap hollow circuit cylinder is enclosed on resonating conductor upper end), and the tuning screw 3 is certainly
The upper end of the hollow circuit cylinder 6 of the dielectric cap 4 is screwed into the hollow circuit cylinder 6, and the hollow circuit cylinder 6 is located at the resonating conductor 1
Inside so that the tuning screw 3 is separated with resonating conductor 1 by the hollow circuit cylinder 6.Also include dielectric posts 5, the medium
Post 5 is the space in the hollow circuit cylinder 6 to be filled up.
Optionally, the coaxial cavity is square chamber or cylindrical cavity.
The present invention discloses a kind of medium filling method of coaxial cavity filter in addition, and the medium filling method is specific
Comprise the following steps：
S1：The cavity filter for not carrying out Filled Dielectrics is debugged, its electrical property is met wave filter technology index
It is required that；
S2：Filter cover board 2 is opened, the dielectric cap 4 is installed on the resonating conductor 1 of each coaxial cavity of wave filter
End, refills upper cover plate 2 so that, the dielectric cap 4 is enclosed on the upper end of resonating conductor 1, and the hollow circuit cylinder 6, which is located at the resonance, leads
The inside of body 1 so that the tuning screw 3 is separated with resonating conductor 1 by the hollow circuit cylinder 6；
S3：Resonance regulation is carried out by adjusting tuning screw 3, until resonant frequency reaches requirement, into step S4；
S4：Filter cover board 2 is opened, to the part of hollow circuit cylinder 6 dielectric posts 5 of the dielectric cap 4 in each coaxial cavity
Filling, the length of dielectric posts 5 correspond to the head of tuning screw 3 according to cavity filter and determined to the distance from bottom of resonating conductor 1；
S5：Resonance regulation is carried out by adjusting tuning screw 3, until resonant frequency reaches requirement.
Wherein, dielectric filler material require loss it is the smaller the better, therefore the dielectric substance can be polytetrafluoroethylene (PTFE),
Any one in expandable polystyrene and rigid ceramic heat-barrier material MPT35.
Further, when the dielectric substance is expandable polystyrene, it is filled using dielectric substance
When, direct foaming, fill up whole filter internal spaces.First foaming can also be carried out using frock form required shape
The part of shape, when being filled using dielectric substance, it is filled using the part.
Further, the coaxial cavity being illustrated in figure 3 after carrying out Filled Dielectrics, it can be seen that cavity bottom still has greatly
Partial space is not filled.Install medium cap 4 can reduce the resonant frequency of original cavity, can be entered by tuning screw 3
Row tuning compensation.
Special case, this hair near the open end of resonating conductor 1 of wave filter coaxial cavity are occurred based on low pressure discharge
The bright method for proposing Filled Dielectrics, even if being filled with dielectric substance to space in coaxial cavity, normal air is changed
Into high voltage bearing dielectric substance, so as to improve the power capacity of wave filter under hypobaric, vacuum environment can be also improved
Under micro discharge power capacity.
The present invention has good versatility and good portability.Present invention could apply to the similar list of aerospace model
Machine product is designed and developed, and reduces the construction cycle of unit, and meets the reliability demand constantly lifted.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, the change or replacement that can readily occur in,
It should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with scope of the claims
It is defined.
Claims (6)
1. a kind of coaxial cavity filter, it is characterised in that including coaxial cavity, resonating conductor, cover plate, tuning screw, medium
Cap and dielectric posts, wherein,
The coaxial cavity is internally provided with the resonating conductor；
The cover plate is covered at the top of the coaxial cavity；
The resonating conductor lower end is connected with the coaxial cavity bottom；
The dielectric cap is installed between the resonating conductor upper end and the cover plate, the dielectric cap be designed with hollow circuit cylinder and
Dead slot is installed, the dielectric cap is set in together by the installation dead slot with the resonating conductor, and the tuning screw is from institute
The upper end for stating the hollow circuit cylinder of dielectric cap is screwed into the hollow circuit cylinder, and the hollow circuit cylinder of the dielectric cap is set in the resonance and led
The inside of body so that the tuning screw is separated with the resonating conductor by the hollow circuit cylinder of the dielectric cap；The dielectric posts
The space in the hollow circuit cylinder to be filled up.
2. a kind of coaxial cavity filter as claimed in claim 1, it is characterised in that the coaxial cavity is square chamber or circle
Chamber.
A kind of 3. medium filling method of coaxial cavity filter, it is characterised in that the medium filling method specifically include as
Lower step：
S1：The cavity filter for not carrying out Filled Dielectrics is debugged, its electrical property is met wave filter technology index request；
S2：Filter cover board is opened, dielectric cap is installed to the resonating conductor upper end of each coaxial cavity of wave filter, is loaded on lid
Plate so that, dielectric cap is enclosed on resonating conductor upper end, and hollow circuit cylinder is located inside resonating conductor so that tuning screw is led with resonance
Body is separated by hollow circuit cylinder；
S3：Resonance regulation is carried out by adjusting tuning screw, until resonant frequency reaches requirement, into step
S4；
S4：Filter cover board is opened, the hollow cylindrical portion of dielectric cap in each coaxial cavity is filled with dielectric posts, medium column length
Degree corresponds to tuning screw head according to cavity filter and determined to resonating conductor distance from bottom；
S5：Resonance regulation is carried out by adjusting tuning screw, until resonant frequency reaches requirement.
A kind of 4. medium filling method of coaxial cavity filter as claimed in claim 3, it is characterised in that the medium
The dielectric substance that cap, the dielectric posts use is polytetrafluoroethylene (PTFE), expandable polystyrene and rigid ceramic heat-barrier material
Any one in MPT35.
A kind of 5. medium filling method of coaxial cavity filter as claimed in claim 4, it is characterised in that the dielectric
Material is expandable polystyrene, when being filled using dielectric substance, direct foaming, is filled up in whole wave filters
Portion space.
A kind of 6. medium filling method of coaxial cavity filter as claimed in claim 4, it is characterised in that the dielectric
Material is expandable polystyrene, and the part of required shape is first formed using frock progress foaming, is utilizing dielectric material
When material is filled, it is filled using the part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510351192.5A CN104953206B (en) | 2015-06-23 | 2015-06-23 | A kind of coaxial cavity filter and its medium filling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510351192.5A CN104953206B (en) | 2015-06-23 | 2015-06-23 | A kind of coaxial cavity filter and its medium filling method |
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| Publication Number | Publication Date |
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| CN104953206A CN104953206A (en) | 2015-09-30 |
| CN104953206B true CN104953206B (en) | 2018-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510351192.5A Active CN104953206B (en) | 2015-06-23 | 2015-06-23 | A kind of coaxial cavity filter and its medium filling method |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106785262B (en) * | 2017-01-18 | 2021-03-12 | 苏州富电通讯有限公司 | Medium interdigital filter |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4491806A (en) * | 1982-10-06 | 1985-01-01 | Motorola, Inc. | Resonant cavity with integrated microphonic suppression means |
| JP2008306526A (en) * | 2007-06-08 | 2008-12-18 | Nippon Steel Corp | Superconductive filter |
| CN201533009U (en) * | 2009-09-18 | 2010-07-21 | 河北博威集成电路有限公司 | Device for loading electric capacity of coaxial resonant cavity |
| CN202308240U (en) * | 2011-10-27 | 2012-07-04 | 北京航天长征飞行器研究所 | Small cavity filter suitable for low-pressure environment |
| CN103022627A (en) * | 2012-12-14 | 2013-04-03 | 中兴通讯股份有限公司 | Transverse magnetic (TM) dielectric resonator, implement method thereof and TM dielectric filter |
| CN104170162A (en) * | 2013-11-18 | 2014-11-26 | 华为技术有限公司 | Resonator, filter, duplexer and multiplexer |
-
2015
- 2015-06-23 CN CN201510351192.5A patent/CN104953206B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4491806A (en) * | 1982-10-06 | 1985-01-01 | Motorola, Inc. | Resonant cavity with integrated microphonic suppression means |
| JP2008306526A (en) * | 2007-06-08 | 2008-12-18 | Nippon Steel Corp | Superconductive filter |
| CN201533009U (en) * | 2009-09-18 | 2010-07-21 | 河北博威集成电路有限公司 | Device for loading electric capacity of coaxial resonant cavity |
| CN202308240U (en) * | 2011-10-27 | 2012-07-04 | 北京航天长征飞行器研究所 | Small cavity filter suitable for low-pressure environment |
| CN103022627A (en) * | 2012-12-14 | 2013-04-03 | 中兴通讯股份有限公司 | Transverse magnetic (TM) dielectric resonator, implement method thereof and TM dielectric filter |
| CN104170162A (en) * | 2013-11-18 | 2014-11-26 | 华为技术有限公司 | Resonator, filter, duplexer and multiplexer |
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| Publication number | Publication date |
|---|---|
| CN104953206A (en) | 2015-09-30 |
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