CN105337008A - Low frequency coaxial cavity filter and manufacturing method thereof - Google Patents
Low frequency coaxial cavity filter and manufacturing method thereof Download PDFInfo
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- CN105337008A CN105337008A CN201510912814.7A CN201510912814A CN105337008A CN 105337008 A CN105337008 A CN 105337008A CN 201510912814 A CN201510912814 A CN 201510912814A CN 105337008 A CN105337008 A CN 105337008A
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Abstract
The invention relates to the filtering field and discloses a low frequency coaxial cavity filter which comprises a single cavity body, a loading capacitor, a screw, a resonance bar and a stop block; the loading capacitor, the screw, the resonance bar and the stop block are located in the single cavity body; the loading capacitor and the resonance bar are connected by the screw; the screw is located at the top end part of the resonance bar; the stop block is located below the loading capacitor. The low frequency coaxial cavity filter has the advantages that the design accuracy is improved, the design time is accelerated, and the development cost is reduced.
Description
Technical field
The present invention relates to filtering field, particularly relate to one
low-frequency Coaxial cavity body filter and preparation method thereof.
Background technology
Filter is one of the important devices in microwave telecommunication system running, and the coaxial cavity filter especially between this frequency range of 200MHz to 500MHz, it is more applied among private network communication project.For low frequency (200Mhz-500Mhz) coaxial cavity filter, although existing designing technique meets the requirement of client substantially, but existing design way does not substantially all consider the size requirements of the control of cost and the volume of filter, or after client limits the overall dimension size of cost and filter, existing technology can cause design and production difficulty to strengthen accordingly.For low frequency (200Mhz-500Mhz) coaxial cavity filter, although existing designing technique meets the requirement of client substantially, but existing design way does not substantially all consider the size requirements of the control of cost and the volume of filter, or after client limits the overall dimension size of cost and filter, existing technology can cause design and production difficulty to strengthen accordingly.Length, width and height as single chamber are 40mm*40mm*45mm, simulation result list chamber resonance frequency greatly about 490Mhz, if customer demand frequency is lower than 400MHz, in order to meet the demand of client, then need the volume strengthening single chamber, also mean that the size of whole filter complete machine can strengthen simultaneously.
Summary of the invention
In order to solve the problems of the prior art, the invention provides one
low-frequency Coaxial cavity body filter, solve the problem that in prior art, volume small frequency is low.
The invention provides a kind of Low-frequency Coaxial cavity body filter manufacture method, comprise the steps: that (A) assembles block in single resonant cavity; (B) height of block is regulated; (C) adjustment of resonance frequency is completed.
As a further improvement on the present invention: in described step (A), the length and width of block and the internal diameter length and width of single resonant cavity are consistent, and this block moves in single resonant cavity.
As a further improvement on the present invention: in described step (B), in simulation software, regulate the distance between block loading capacitance, regulate the diameter of block centre bore simultaneously.
As a further improvement on the present invention: in described step (C), determine resonance frequency and according to different resonance frequencys, corresponding adjustment carried out to block.
As a further improvement on the present invention: the distance that the distance of described block and loading capacitance is greater than 1mm and block central through hole edge and resonant rod external diameter is greater than 1mm.
Invention also provides a kind of Low-frequency Coaxial cavity body filter, comprise single cavity, loading capacitance, screw rod, resonant rod and block; Described loading capacitance, screw rod, resonant rod and block are positioned at described single cavity; Described loading capacitance is connected by resonant rod with block; Described screw rod is positioned at the top ends of described resonant rod; Described block is positioned at the below of described loading capacitance.
As a further improvement on the present invention: described block is provided with centre bore; Described resonant rod is through described block.
As a further improvement on the present invention: described block slides in described single cavity with resonant rod, the length and width of block and the length and width of single cavity internal diameter are consistent.
As a further improvement on the present invention: the distance that the distance of described block and loading capacitance is greater than 1mm and block central through hole edge and resonant rod external diameter is greater than 1mm.
As a further improvement on the present invention: the centre bore of block can carry out size adjustment, and the distance between block and loading capacitance can regulate.
The invention has the beneficial effects as follows: improve the accuracy of design, accelerate design time and reduce R&D costs.
[
accompanying drawing illustrates]
Fig. 1 is Low-frequency Coaxial cavity body filter working method cutaway view of the present invention.
[embodiment]
Illustrate below in conjunction with accompanying drawing and embodiment the present invention is further described.
A kind of Low-frequency Coaxial cavity body filter, comprises single cavity, loading capacitance, screw rod, resonant rod and block; Described loading capacitance, screw rod, resonant rod and block are positioned at described single cavity; Described loading capacitance is connected by resonant rod with block; Described screw rod is positioned at the top ends of described resonant rod; Described block is positioned at the below of described loading capacitance.
Described block is provided with centre bore; Described resonant rod is through described block.
Described block slides in described single cavity with resonant rod.
Invention also provides a kind of Low-frequency Coaxial cavity body filter manufacture method, comprise the steps: that (A) assembles block in single resonant cavity; (B) height of block is regulated; (C) adjustment of resonance frequency is completed.
In described step (A), the length and width of block and the internal diameter length and width of single resonant cavity are consistent, and this block moves in single resonant cavity.
In described step (B), in simulation software, regulate the distance between block loading capacitance, regulate the diameter of block centre bore simultaneously.
In described step (C), determine resonance frequency and according to different resonance frequencys, corresponding adjustment carried out to block.
The distance that the distance of described block and loading capacitance is greater than 1mm and block central through hole edge and resonant rod external diameter is greater than 1mm.
The present invention mainly provides a kind of new design, under the condition of equal single chamber and resonant rod, can design the filter that frequency is lower.
Its design purport is the resonance frequency size of ground level and metal backup centre bore being changed to single chamber by regulating metal backup, makes its resonance frequency can become lower.The resonance frequency height in single chamber is mainly controlled by the size of resonant rod and single chamber size.Single cavity resonator structure is as above shown in Fig. 1, and along with the reducing of distance of metal backup and loading capacitance, in resonant cavity, resonance frequency can step-down gradually.Such as: in figure, metal backup distance loading capacitance is 1.5mm and block centre bore distance resonant rod when being 1.5mm, and single chamber resonance frequency is at this moment probably about 380MHz, compared with simulation frequency 490MHz when not adding block, approximately to partially low 100MHz.
In one embodiment, as Fig. 1, a kind of
low-frequency Coaxial cavity body filter, comprise single cavity 5, loading capacitance 1, screw rod 2, resonant rod 3 and block 4; Described loading capacitance 1, screw rod 2, resonant rod 3 and block are positioned at described single cavity; Described loading capacitance 1 is connected by resonant rod 3 with block 4; Described screw rod 2 is positioned at the top ends of described resonant rod 3; Described block 4 is positioned at the below of described loading capacitance 1, and cover plate 6 is for covering described single cavity 5, and described block 4 is provided with centre bore 41; Described resonant rod 3 is through described block 4, and described block 4 slides in described single cavity 5 with resonant rod.
In one embodiment, its design purport assembles a metal backup in single resonant cavity, and the length and width of metal backup and the length and width of single resonant cavity are consistent.By regulating the height H 1(over the ground of metal backup or the distance H2 between metal backup and loading capacitance in simulation software) and the size of diameter H3 of metal backup centre bore determine the resonance frequency of resonant cavity, and make resonant frequency can become lower.Can H1(or H2 be determined by software emulation) and the distance size of H3, and be finally applied in practical communication engineering, when design, it should be noted that and will control the distance H2 of metal backup and loading capacitance and the size of block central through hole diameter H3 well, the distance that the distance H2 that as far as possible can meet metal backup and loading capacitance is greater than 1mm and block central through hole edge and resonant rod external diameter is greater than 1mm (namely H3-H4>1mm), if too little too little meeting adds processing and the production difficulty of large cavity.
In one embodiment, when not adding metal backup, now the volume of single resonant cavity is 40mm*40mm*45mm, and simulation frequency is 490Mhz; After adding metal backup by the present invention; the distance H2 of metal backup and loading capacitance is 1.2mm; the diameter H3 of block centre bore is 12.5mm; resonant rod overall diameter H4 is 10.5mm; metal backup size is 32mm*32mm*3mm; now the volume of single resonant cavity is 32mm*32mm*45mm, and simulation frequency is also 490Mhz; With the volume vs of single resonant cavity not adding block, long and widely to reduce all accordingly, while also meet the frequency requirement that design wants, for a filter comprising six resonant cavitys, adopt this scheme of metal backup, cost and volume can be reduced greatly.Calculating, emulation individual cell frequency time, by modeling and simulation accurately, improve the accuracy of design, accelerate design time and reduce R&D costs, then verified the feasibility of this device by the experiment of complexity.Look into by seeing; Experimental result, the constantly size of the Distance geometry centre bore of adjustment and control metal backup and loading capacitance, and finally determine the resonance frequency of filter.By technique scheme, overcome design and the production difficulty of the filter that volume small frequency is low in prior art.
Because this device is mounted in filter internal, when block contacts good with cavity, any change can not be had to filter volume, under the condition that single chamber size is equal, the lower filter of frequency can be designed again simultaneously, effectively improve low-frequency filter volume large, the shortcoming that cost is high.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. a Low-frequency Coaxial cavity body filter manufacture method, is characterized in that: comprise the steps: that (A) assembles block in single resonant cavity; (B) height of block is regulated; (C) adjustment of resonance frequency is completed.
2. Low-frequency Coaxial cavity body filter manufacture method according to claim 1, is characterized in that: in described step (A), the length and width of block and the internal diameter length and width of single resonant cavity are consistent, and this block moves in single resonant cavity.
3. Low-frequency Coaxial cavity body filter manufacture method according to claim 1, is characterized in that: in described step (B), regulate the distance between block loading capacitance in simulation software, regulates the diameter of block centre bore simultaneously.
4. Low-frequency Coaxial cavity body filter manufacture method according to claim 1, is characterized in that: in described step (C), determines resonance frequency and carries out corresponding adjustment according to different resonance frequencys to block.
5. Low-frequency Coaxial cavity body filter manufacture method according to claim 3, is characterized in that: the distance that the distance of described block and loading capacitance is greater than 1mm and block central through hole edge and resonant rod external diameter is greater than 1mm.
6. a Low-frequency Coaxial cavity body filter, is characterized in that: comprise single cavity, loading capacitance, screw rod, resonant rod and block; Described loading capacitance, screw rod, resonant rod and block are positioned at described single cavity; Described loading capacitance is connected by resonant rod with block; Described screw rod is positioned at the top ends of described resonant rod; Described block is positioned at the below of described loading capacitance.
7. Low-frequency Coaxial cavity body filter according to claim 6, is characterized in that: described block is provided with centre bore; Described resonant rod is through described block.
8. Low-frequency Coaxial cavity body filter according to claim 6, is characterized in that: described block slides in described single cavity with resonant rod, and the length and width of block and the length and width of single cavity internal diameter are consistent.
9. Low-frequency Coaxial cavity body filter according to claim 6, is characterized in that: the distance that the distance of described block and loading capacitance is greater than 1mm and block central through hole edge and resonant rod external diameter is greater than 1mm.
10. Low-frequency Coaxial cavity body filter according to claim 6, is characterized in that: the centre bore of block can carry out size adjustment, and the distance between block and loading capacitance can regulate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510912814.7A CN105337008B (en) | 2015-12-11 | 2015-12-11 | Low-frequency Coaxial cavity body filter and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510912814.7A CN105337008B (en) | 2015-12-11 | 2015-12-11 | Low-frequency Coaxial cavity body filter and preparation method thereof |
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| Publication Number | Publication Date |
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| CN105337008A true CN105337008A (en) | 2016-02-17 |
| CN105337008B CN105337008B (en) | 2019-04-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106229592A (en) * | 2016-09-20 | 2016-12-14 | 中国电子科技集团公司第五十四研究所 | A kind of low-frequency range cavity band-pass filter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1277469A (en) * | 1999-06-15 | 2000-12-20 | 奥根公司 | Tuning assembly of hollow intermediate electric resonator |
| WO2005020366A1 (en) * | 2003-08-23 | 2005-03-03 | Kmw Inc. | Variable radio frequency band filter |
| CN1717838A (en) * | 2003-03-18 | 2006-01-04 | 菲尔特朗尼克科姆特克有限公司 | Resonator filter |
| CN103650237A (en) * | 2013-08-09 | 2014-03-19 | 华为技术有限公司 | Filter tuning device and filter |
-
2015
- 2015-12-11 CN CN201510912814.7A patent/CN105337008B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1277469A (en) * | 1999-06-15 | 2000-12-20 | 奥根公司 | Tuning assembly of hollow intermediate electric resonator |
| CN1717838A (en) * | 2003-03-18 | 2006-01-04 | 菲尔特朗尼克科姆特克有限公司 | Resonator filter |
| WO2005020366A1 (en) * | 2003-08-23 | 2005-03-03 | Kmw Inc. | Variable radio frequency band filter |
| CN103650237A (en) * | 2013-08-09 | 2014-03-19 | 华为技术有限公司 | Filter tuning device and filter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106229592A (en) * | 2016-09-20 | 2016-12-14 | 中国电子科技集团公司第五十四研究所 | A kind of low-frequency range cavity band-pass filter |
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| Publication number | Publication date |
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| CN105337008B (en) | 2019-04-02 |
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