CN203553314U - A waveguide low-pass filter - Google Patents
A waveguide low-pass filter Download PDFInfo
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- CN203553314U CN203553314U CN201320657942.8U CN201320657942U CN203553314U CN 203553314 U CN203553314 U CN 203553314U CN 201320657942 U CN201320657942 U CN 201320657942U CN 203553314 U CN203553314 U CN 203553314U
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- waveguide
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- 239000002184 metal Substances 0.000 claims description 12
- 238000004891 communication Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 description 4
- 238000001914 filtration Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
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Abstract
The utility model relates to a waveguide low-pass filter which comprises a filter body. The filter body is in a flat plate shape. The waveguide low-pass filter is characterized in that a dumbbell-shaped pit used as a resonant cavity is formed on a side of the filter body, that five metallic resonant columns are arranged in the length direction of the resonant cavity, that three of the metallic resonant columns are uniformly distributed at a middle narrow section of the resonant cavity, that the other two metallic resonant columns are arranged on wide sections on the two ends of the middle section, that the two ends of the resonant cavity are respectively provided with a waveguide cavity, the waveguide cavities are communicated with each other, that the width of each waveguide cavity is larger than the width of the wide section, that an integrated cover plate is arranged on an opening of the resonant cavity and openings of the waveguide cavities, and that gaps are arranged between the integrated cover plate and the resonant columns. The waveguide low-pass filter is small in size, easy to install, good in uniformity, high in reliability, and strong in environment adaptability, and suitable for communication equipment in a wireless base station.
Description
Technical field
The utility model relates to a kind of filter.Specifically, be the waveguide lowpass on the communication equipment being applied in wireless base station.
Background technology
In electronic equipment production and application, all know, due to the inherent characteristic of electronic equipment, when operation, all can produce harmonic wave and spuious.These harmonic waves and the spuious normal work that can disturb electronic equipment after amplifier amplifies.On modern radar and communication equipment, often for pursuing farther operating distance, increase peak power and the average power of its output, obtain higher peak power and average power, just must improve the power of transmitter.High-power transmitter will inevitably bring too high harmonic power, and these high-power harmonic energies of transmitter can even burn electronic equipment by severe jamming.In addition, the underproof electronic equipment of output harmonic wave also cannot obtain the licence that dispatches from the factory of Wireless Management Committee.Therefore, just must low pass filter be set at radio-frequency front-end, with the harmonic spectrum energy of filtering electronic equipment output.
At present, the low pass filter that is used in radio-frequency front-end mainly contains coaxial sugarcoated haws shape low pass filter and broadband ridge waveguide low pass filter.Coaxial sugarcoated haws shape low pass filter has advantages of that volume is little, it is wide to be with, but uses when radio-frequency front-end, exists the shortcomings such as difficult, consistency is poor, reliability is not high, environmental suitability is poor are installed.Therefore, generally all avoid using this coaxial sugarcoated haws shape low pass filter.Broadband ridge waveguide low pass filter have advantages of and waveguide radio frequency front end between easy to connect, processing high conformity, reliability is high, but volume is larger, in frequency, compared with the place of low-frequency range and structural requirement compactness, uses more difficult.
Utility model content
Problem to be solved in the utility model is to provide a kind of waveguide lowpass.This waveguide lowpass, volume is little, easily installation, high conformity, reliability is high, environmental suitability is strong.
For overcoming the above problems, take following technical scheme:
Waveguide lowpass of the present utility model comprises filter body.Described filter body is tabular, is characterized in that the one side of filter body has the dumb-bell shape pit as resonant cavity.Along being furnished with five metal resonant columns on the length direction of resonant cavity, narrow section of centre that three metal resonant columns are wherein distributed on resonant cavity is upper, and another two metal resonant columns are separately positioned on wide section of interlude two ends.All there are waveguide cavity and the two connection in the two ends of resonant cavity, the width of wider section described in the width of described waveguide cavity is greater than.The oral area of described resonant cavity and waveguide cavity has integral type cover plate, between described integral type cover plate and resonant column, leaves gap.
Further improvement of the utility model scheme is, wider section of wider intersegmental, the described resonant cavity of described waveguide cavity and described resonant cavity with its in the middle of intersegmental all curved excessively.
Further improvement project of the present utility model is, the chamber base thickness degree of a described waveguide cavity is less than the chamber base thickness degree of wider section of the resonant cavity being adjacent, so that in the vertical direction has step between at the bottom of the wider section of chamber being adjacent at the bottom of the chamber of a described waveguide cavity.
Take such scheme, have the following advantages:
As can be seen from the above scheme, the one side due to described filter body has the dumb-bell shape pit as resonant cavity.Along being furnished with five metal resonant columns on the length direction of resonant cavity, wherein, narrow section of the centre that has three metal resonant columns to be distributed on resonant cavity is upper, and another two metal resonant columns are separately positioned on wide section of interlude two ends.All there are waveguide cavity and the two connection in the two ends of resonant cavity, the width of wider section described in the width of described waveguide cavity is greater than.The oral area of described resonant cavity and waveguide cavity has integral type cover plate, leakage of oil gap between described cover plate and resonant column.By the resonant cavity of waveguide cavity and the first rank resonator is set together, effectively dwindled the volume of low pass filter.By the formed loading capacitance in the gap between described cover plate and resonant column, realized the function of filtering far-end harmonic.By the spacing arranging between resonant column, can control bandwidth and adjust echo.Therefore, the utlity model has the advantages such as little, the easy installation of volume, high conformity, reliability is high, environmental suitability is strong.
Accompanying drawing explanation
Fig. 1 is waveguide lowpass structural representation of the present utility model;
Fig. 2 is the schematic top plan view of removing the Fig. 1 after cover plate.
Embodiment
As depicted in figs. 1 and 2, waveguide lowpass of the present utility model comprises filter body 2.Described filter body 2 is tabular, in its one side, is processed with the dumb-bell shape pit as resonant cavity 4.Along being furnished with equably five metal resonant columns 7 on the length direction of resonant cavity 4, make 7 of adjacent resonant columns all leave spacing 5.Wherein, narrow section of the centre that has three metal resonant columns 7 to be distributed on resonant cavity 4 is upper, and another two metal resonant columns 7 are separately positioned on wide section of interlude two ends; The two ends of resonant cavity 4 are all processed with waveguide cavity 1, and the two ends of resonant cavity 4 are all communicated with 1 of waveguide cavity, the width of wider section described in the width of described waveguide cavity 1 is greater than again.On the oral area of described resonant cavity 4 and waveguide cavity 1, be fixed with integral type cover plate 3,7 of described cover plate 3 and resonant columns leave gap 6.
Wherein, wider section of wider intersegmental, the described resonant cavity 4 of described waveguide cavity 1 and described resonant cavity 4 with its in the middle of intersegmental all process curved excessively.
The chamber base thickness degree of a described waveguide cavity 1 is less than the chamber base thickness degree of wide section of the resonant cavity 4 that is adjacent, so that in the vertical direction has step 8 between at the bottom of the wide section of chamber being adjacent at the bottom of the chamber of a described waveguide cavity 1.
The utility model, by the resonant cavity 4 of waveguide cavity 1 and the first rank resonator is set together, has effectively dwindled the volume of low pass filter.By the formed loading capacitance in gap 6 of 7 of described cover plate 3 and resonant columns, realized the function of filtering far-end harmonic.By the spacing 5 in 7 settings of resonant column, can control bandwidth and adjust clawback.The advantage such as make the utlity model has little, the easy installation of volume, high conformity, reliability is high, environmental suitability is strong.
Claims (3)
1. a waveguide lowpass, comprises filter body (2); Described filter body (2) is tabular, it is characterized in that the one side of filter body (2) has the dumb-bell shape pit as resonant cavity (4); Along being furnished with five metal resonant columns (7) on the length direction of resonant cavity (4), it is upper that three metal resonant columns (7) are wherein distributed on narrow section of the centre of resonant cavity (4), and another two metal resonant columns (7) are separately positioned on wide section of interlude two ends; All there are waveguide cavity (1) and the two connection in the two ends of resonant cavity (4), the width of wider section described in the width of described waveguide cavity (1) is greater than; The oral area of described resonant cavity (4) and waveguide cavity (1) has integral type cover plate (3), between described integral type cover plate (3) and resonant column (7), leaves gap (6).
2. waveguide lowpass as claimed in claim 1, it is characterized in that described waveguide cavity (1) and described resonant cavity (4) wider section of wider intersegmental, described resonant cavity (4) with its in the middle of intersegmental all curved excessively.
3. waveguide lowpass as claimed in claim 1, the chamber base thickness degree that it is characterized in that a described waveguide cavity (1) is less than the chamber base thickness degree of wider section of the resonant cavity (4) that is adjacent, so that in the vertical direction has step (8) between at the bottom of the wider section of chamber being adjacent at the bottom of the chamber of a described waveguide cavity (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320657942.8U CN203553314U (en) | 2013-10-24 | 2013-10-24 | A waveguide low-pass filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320657942.8U CN203553314U (en) | 2013-10-24 | 2013-10-24 | A waveguide low-pass filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203553314U true CN203553314U (en) | 2014-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320657942.8U Expired - Lifetime CN203553314U (en) | 2013-10-24 | 2013-10-24 | A waveguide low-pass filter |
Country Status (1)
| Country | Link |
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| CN (1) | CN203553314U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545583A (en) * | 2013-10-24 | 2014-01-29 | 江苏贝孚德通讯科技股份有限公司 | Waveguide low-pass filter |
| CN104241746A (en) * | 2014-09-09 | 2014-12-24 | 江苏贝孚德通讯科技股份有限公司 | Waveguide high-frequency low-pass filter |
| CN110707404A (en) * | 2015-10-15 | 2020-01-17 | 日本电产株式会社 | Waveguide device and antenna device having the same |
-
2013
- 2013-10-24 CN CN201320657942.8U patent/CN203553314U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545583A (en) * | 2013-10-24 | 2014-01-29 | 江苏贝孚德通讯科技股份有限公司 | Waveguide low-pass filter |
| CN104241746A (en) * | 2014-09-09 | 2014-12-24 | 江苏贝孚德通讯科技股份有限公司 | Waveguide high-frequency low-pass filter |
| CN110707404A (en) * | 2015-10-15 | 2020-01-17 | 日本电产株式会社 | Waveguide device and antenna device having the same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140416 |