CN205452494U - Coaxial cavity filter of low frequency - Google Patents
Coaxial cavity filter of low frequency Download PDFInfo
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- CN205452494U CN205452494U CN201521025093.XU CN201521025093U CN205452494U CN 205452494 U CN205452494 U CN 205452494U CN 201521025093 U CN201521025093 U CN 201521025093U CN 205452494 U CN205452494 U CN 205452494U
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- screw rod
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Abstract
The utility model relates to a filtering field, it discloses a coaxial cavity filter of low frequency, including single chamber, loading electric capacity, screw rod, resonance bar and dog, loading electric capacity, screw rod, resonance bar and dog are located in the single chamber, loading electric capacity and dog are connected through resonance bar, the screw rod is located resonance bar's top portion, the dog is located the below of loading electric capacity. The beneficial effects of the utility model are that: improve accuracy, the quickening design time of design and reduce research and development cost.
Description
Technical field
This utility model relates to filtering field, particularly relates to a kind of Low-frequency Coaxial cavity body filter.
Background technology
Wave filter is one of important devices in microwave telecommunication system running, and the coaxial cavity filter between this frequency range of especially 200MHz to 500MHz, it is more applied among private network communication project.For low frequency (200Mhz-500Mhz) coaxial cavity filter, although existing designing technique has substantially met the requirement of client, but existing design way does not the most all account for the control of cost and the size requirements of the volume of wave filter, or after client limits the overall dimensions size of cost and wave filter, existing technology can cause design and production difficulty to strengthen accordingly.For low frequency (200Mhz-500Mhz) coaxial cavity filter, although existing designing technique has substantially met the requirement of client, but existing design way does not the most all account for the control of cost and the size requirements of the volume of wave filter, or after client limits the overall dimensions size of cost and wave filter, existing technology can cause design and production difficulty to strengthen accordingly.40mm*40mm*45mm as a height of in the length and width of single-chamber, simulation result single-chamber resonant frequency is about at 490Mhz, if customer demand frequency is less than 400MHz, in order to meet the demand of client, then need to strengthen the volume of single-chamber, also imply that the size of whole wave filter complete machine can strengthen simultaneously.
Summary of the invention
In order to solve the problems of the prior art, this utility model provides a kind of Low-frequency Coaxial cavity body filter, solves the problem that in prior art, volume small frequency is low.
This utility model provides a kind of Low-frequency Coaxial cavity body filter, including single-chamber body, loading capacitance, screw rod, resonant rod and block；Described loading capacitance, screw rod, resonant rod and block are positioned at described single-chamber body；Described loading capacitance and block are attached by resonant rod；Described screw rod is positioned at the top ends of described resonant rod；Described block is positioned at the lower section of described loading capacitance.
As further improvement of the utility model: described block is provided with centre bore；Described resonant rod passes described block.
As further improvement of the utility model: described block slides in described single-chamber body with resonant rod.
The beneficial effects of the utility model are: improve the accuracy of design, accelerate the design time and reduce R&D costs.
[accompanying drawing explanation]
Fig. 1 is utility model works mode sectional view.
[detailed description of the invention]
This utility model is further illustrated by explanation and detailed description of the invention below in conjunction with the accompanying drawings.
Such as Fig. 1, a kind of Low-frequency Coaxial cavity body filter, including single-chamber body 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-chamber body；Described loading capacitance 1 and block 4 are attached by resonant rod 3；Described screw rod 2 is positioned at the top ends of described resonant rod 3；Described block 4 is positioned at the lower section of described loading capacitance 1, and cover plate 6 is used for covering described single-chamber body 5.
Described block 4 is provided with centre bore 41；Described resonant rod 3 is through described block 4.
Described block 4 slides in described single-chamber body 5 with resonant rod.
This utility model mainly provides a kind of new design, can design, under conditions of equal single-chamber and resonant rod, the wave filter that frequency is lower.
Its design purport is the resonant frequency being changed single-chamber by the size to ground level and metal backup centre bore of regulation metal backup so that it is resonant frequency can become lower.The resonant frequency height of single-chamber is mainly controlled by size and the single-chamber size of resonant rod.Single cavity resonator structure is as shown in figure 1 above, and along with the reducing of distance of metal backup and loading capacitance, in resonator cavity, resonant frequency can gradually step-down.Such as: in figure, metal backup distance loading capacitance is 1.5mm and block centre bore distance resonant rod is when being 1.5mm, and single-chamber resonant frequency at this moment is about about 380MHz, compared with simulation frequency 490MHz when being not added with block, about to partially low 100MHz.
Owing to this device is mounted in filter internal, in the case of block contacts well with cavity, wave filter volume will not there be is any change, under conditions of single-chamber size is equal, can be designed that again the wave filter that frequency is lower simultaneously, effectively improve low-frequency filter volume big, the shortcoming that cost is high.
Above content is to combine concrete preferred implementation further detailed description of the utility model, it is impossible to assert that of the present utility model being embodied as is confined to these explanations.For this utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, it is also possible to make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.
Claims (3)
1. a Low-frequency Coaxial cavity body filter, it is characterised in that: include single-chamber body, loading capacitance, screw rod, resonant rod and block；Described loading capacitance, screw rod, resonant rod and block are positioned at described single-chamber body；Described loading capacitance and block are attached by resonant rod；Described screw rod is positioned at the top ends of described resonant rod；Described block is positioned at the lower section of described loading capacitance；Described block is metal backup, and this metal backup distance loading capacitance is 1.5mm and block centre bore distance resonant rod is 1.5mm.
Low-frequency Coaxial cavity body filter the most according to claim 1, it is characterised in that: described block is provided with centre bore；Described resonant rod passes described block.
Low-frequency Coaxial cavity body filter the most according to claim 1, it is characterised in that: described block slides in described single-chamber body with resonant rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521025093.XU CN205452494U (en) | 2015-12-11 | 2015-12-11 | Coaxial cavity filter of low frequency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521025093.XU CN205452494U (en) | 2015-12-11 | 2015-12-11 | Coaxial cavity filter of low frequency |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205452494U true CN205452494U (en) | 2016-08-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521025093.XU Active CN205452494U (en) | 2015-12-11 | 2015-12-11 | Coaxial cavity filter of low frequency |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205452494U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106356595A (en) * | 2016-09-19 | 2017-01-25 | 深圳三星通信技术研究有限公司 | Cavity filter |
-
2015
- 2015-12-11 CN CN201521025093.XU patent/CN205452494U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106356595A (en) * | 2016-09-19 | 2017-01-25 | 深圳三星通信技术研究有限公司 | Cavity filter |
| CN106356595B (en) * | 2016-09-19 | 2019-07-30 | 深圳三星通信技术研究有限公司 | A kind of cavity body filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |